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Degaki H, Taniguchi I, Deguchi S, Koga T. Critical role of lattice vacancies in pressure-induced phase transitions of baroplastic diblock copolymers. SOFT MATTER 2024; 20:3728-3731. [PMID: 38516820 DOI: 10.1039/d4sm00098f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Baroplastic diblock copolymers exhibit order-disorder transitions and melt upon compression at low temperatures, in some cases even at ambient temperatures. Their unique low-temperature processability makes them promising candidates for sustainable polymeric materials. Despite their potential, however, the molecular mechanisms governing the pressure-induced phase transitions of these copolymers remain largely unexplored. This study develops a compressible self-consistent field theory for baroplastic copolymers based on a simple lattice vacancy model that explicitly incorporates voids to account for compressibility. The theory shows that the selective presence of voids in compressible domains stabilizes the ordered phase, while a reduction of voids under compression leads to the order-disorder transition. In addition, this work demonstrates for the first time the critical role of gas absorption rates in each segment in the pressure-induced order-disorder transition of baroplastic diblock copolymers. These findings have significant implications for the rational design of baroplastic polymers with tailored low-temperature processability.
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Affiliation(s)
- Hiroki Degaki
- Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
- Research Center for Bioscience and Nanoscience, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| | - Ikuo Taniguchi
- Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Research Center for Bioscience and Nanoscience, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| | - Shigeru Deguchi
- Research Center for Bioscience and Nanoscience, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| | - Tsuyoshi Koga
- Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
- Research Center for Bioscience and Nanoscience, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
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2
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Zhao M, Li X, Cho J. Pressure Effects on Self-Assembly in Mixtures Containing Zwitterionic Amphiphiles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3882-3896. [PMID: 33754727 DOI: 10.1021/acs.langmuir.1c00024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
To understand the responses of self-assembly in mixtures containing zwitterionic amphiphilic chains to high pressure, we introduce a self-consistent field theory in combination with a molecular equation-of-state model for them in a primitive way. The free energy density for those in the bulk state is first formulated. Its locally equilibrated excess part is then incorporated into Edwards Hamiltonian along with the electrostatic energy contributions to elicit the saddle point approximation to the partition function with proper self-consistent field equations. It is shown that charge-charge correlations enhance self-assembling tendency for the amphiphiles with the opposite charges on one component side, as the medium dielectric constant εr decreases. Those with the opposite charges at the two chain ends respond in a more complicated way to εr. Densification by applied pressure strengthens the self-assembly for both at a moderate εr, similar to typical phospholipids, but pressure effects are strongly dependent on the position of charges along the chains at a lower εr. It is argued that the manipulation of the dielectric environment and disparity in component dispersion interactions can yield useful materials exhibiting various types of baroresponsivity or thermoresponsivity with re-entrant self-assembly.
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Affiliation(s)
- Mingge Zhao
- Department of Polymer Science & Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi-do 16890, Korea
| | - Xiang Li
- Department of Polymer Science & Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi-do 16890, Korea
| | - Junhan Cho
- Department of Polymer Science & Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi-do 16890, Korea
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4
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Lee Y, Lee H, Kim SW, Park S, Kim E, Han YS, Ryu DY. Baroplastic behavior of miscible block copolymer blends. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.11.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Lee DH, Lee H, Lee Y, Kim Y, Ryu DY. Enthalpic and Volumetric Changes at Phase Transitions of Polystyrene-b-poly(alkyl methacrylate) Copolymers and Their Pressure Dependence. Macromolecules 2014. [DOI: 10.1021/ma402535w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong Hyun Lee
- Department
of Polymer Science and Engineering, Dankook University, Yongin, Gyeonggi-do 448-701, Korea
| | - Hoyeon Lee
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Korea
| | - Yonghoon Lee
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Korea
| | - Yoonkeun Kim
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Korea
| | - Du Yeol Ryu
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Korea
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6
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OSAKA N. Phase Behavior and Physical Properties of Polymers Under Pressure. KOBUNSHI RONBUNSHU 2014. [DOI: 10.1295/koron.71.430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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7
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Cho J. Superposition in Flory-Huggins χ and Interfacial Tension for Compressible Polymer Blends. ACS Macro Lett 2013; 2:544-549. [PMID: 35581815 DOI: 10.1021/mz400111x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigate theoretically the response of interfacial tension γ for compressible polymer blends to thermodynamic variables. Helfand's self-consistent field theory is first extended to be combined with an off-lattice equation-of-state model to describe compressibility. Typical incompatible blends reveal that the effects of temperature and pressure (T-P) on γ are superposed into a single curve by a dimensionless pressure variable through the superposition in Flory-Huggins χ and density. In the case of polymer blends with strong compressibility difference, γ shows an anomaly upon pressurization with no T-P superposition, even though χ still follows the superposition.
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Affiliation(s)
- Junhan Cho
- Department of Polymer Science & Engineering and Center for Photofunctional Energy Materials, Dankook University, 126 Jukjeon-dong, Suji-gu, Yongin-si, Gyeonggi-do 448-701, Korea
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8
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Osaka N, Shibayama M. Pressure Effects on Cononsolvency Behavior of Poly(N-isopropylacrylamide) in Water/DMSO Mixed Solvents. Macromolecules 2012. [DOI: 10.1021/ma2027116] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Noboru Osaka
- Department of Organic and Polymer
Materials Chemistry, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan
| | - Mitsuhiro Shibayama
- Neutron Science Laboratory,
Institute for Solid State Physics, The University of Tokyo, 106-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
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Voelkel A, Strzemiecka B, Adamska K, Milczewska K. Inverse gas chromatography as a source of physiochemical data. J Chromatogr A 2009; 1216:1551-66. [DOI: 10.1016/j.chroma.2008.10.096] [Citation(s) in RCA: 161] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Revised: 10/21/2008] [Accepted: 10/22/2008] [Indexed: 10/21/2022]
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11
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Castelletto V, Newby GE, Hamley IW, Noirez L, Baroni P. Pressure effects revealed by small angle neutron scattering on block copolymer gels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8319-8324. [PMID: 18564866 DOI: 10.1021/la801025n] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We study the effects of hydrostatic pressure (P) on aqueous solutions and gels of the block copolymer B(20)E(610) (E, oxyethylene; B, oxybutylene; subscripts, number of repeats), by performing simultaneous small angle neutron scattering/pressure experiments. Micellar cubic gels were studied for 9.5 and 4.5 wt % B(20)E(610) at T = 20-80 and 35-55 degrees C, respectively, while micellar isotropic solutions where studied for 4.5 wt % B(20)E(610) at T > 55 degrees C. We observed that the interplanar distance d 110 (cubic unit cell parameter a = [see text for formula]) decreases while the correlation length of the cubic order (delta) increases, upon increasing P at a fixed T for 9.5 wt % B(20)E(610). The construction of master curves for d(110) and delta corresponding to 9.5 wt % B(20)E(610) proved the correlation between changes in T and P. Neither d(110) and delta nor the cubic-isotropic phase transition temperature was affected by the applied pressure for 4.5 wt % B(20)E(610). The dramatic contrast between the pressure-induced behavior observed for 9.5 and 4.5 wt % B(20)E(610) suggests that pressure induced effects might be more effectively transmitted through samples that present wider domains of cubic structure order (9.5 wt % compared to 4.5 wt % B(20)E(610)).
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Affiliation(s)
- V Castelletto
- School of Chemistry, Food Biosciences and Pharmacy, The University of Reading, P.O. Box 226, Whiteknights, Reading, UK.
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Nakamura KI, Nishitsuji S, Takenaka M, Ouchi M, Sawamoto M. Architecture dependence of thermal fluctuation effects on the order–disorder transition of block copolymer melts. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.04.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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14
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Xu H, Liu H, Hu Y. The Effect of Pressure on the Microphase Separation of Diblock Copolymer Melts Studied by Dynamic Density Functional Theory Based on Equation of State. MACROMOL THEOR SIMUL 2007. [DOI: 10.1002/mats.200600078] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Cho J, Wang ZG. A Simple Field-Theoretic Simulation Method for Compressible Block Copolymer Systems. Macromolecules 2006. [DOI: 10.1021/ma052565r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Junhan Cho
- Department of Polymer Science and Engineering, and Hyperstructured Organic Materials Research Center, Dankook University, San-8, Hannam-dong, Yongsan-gu, Seoul, 140-714, Korea, and Department of Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Zhen-Gang Wang
- Department of Polymer Science and Engineering, and Hyperstructured Organic Materials Research Center, Dankook University, San-8, Hannam-dong, Yongsan-gu, Seoul, 140-714, Korea, and Department of Chemical Engineering, California Institute of Technology, Pasadena, California 91125
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Yamauchi K, Hasegawa H, Hashimoto T, Tanaka H, Motokawa R, Koizumi S. Direct Observation of Polymerization-Reaction-Induced Molecular Self-Assembling Process: In-Situ and Real-Time SANS Measurements during Living Anionic Polymerization of Polyisoprene-block-polystyrene. Macromolecules 2006. [DOI: 10.1021/ma052696s] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kazuhiro Yamauchi
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai-mura, Ibaraki-ken 319-1195, Japan, and Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Hirokazu Hasegawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai-mura, Ibaraki-ken 319-1195, Japan, and Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Takeji Hashimoto
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai-mura, Ibaraki-ken 319-1195, Japan, and Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Hirokazu Tanaka
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai-mura, Ibaraki-ken 319-1195, Japan, and Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Ryuhei Motokawa
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai-mura, Ibaraki-ken 319-1195, Japan, and Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Satoshi Koizumi
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai-mura, Ibaraki-ken 319-1195, Japan, and Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
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17
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Inverse gas chromatographic and chemometric tools for determination of interactions between the components of polymeric composition. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2005.12.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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19
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Jiang S, An L, Jiang B, Wolf BA. Temperature and pressure dependence of phase separation of trans-decahydronaphthalene/polystyrene solution. Chem Phys 2004. [DOI: 10.1016/j.chemphys.2003.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Gonzalez-Leon JA, Acar MH, Ryu SW, Ruzette AVG, Mayes AM. Low-temperature processing of ‘baroplastics’ by pressure-induced flow. Nature 2003; 426:424-8. [PMID: 14647377 DOI: 10.1038/nature02140] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2003] [Accepted: 10/21/2003] [Indexed: 11/09/2022]
Abstract
The manufacturing of plastics traditionally involves melt processing at temperatures typically greater than 200 degrees C-to enable extrusion or moulding under pressure into desired forms-followed by solidification. This process consumes energy and can cause substantial degradation of polymers and additives (such as flame retardants and ultraviolet stabilizers), limiting plastics performance and recyclability. It was recently reported that the application of pressure could induce melt-like behaviour in the block copolymer polystyrene-block-poly(n-butyl methacrylate) (PS-b-PBMA), and this behaviour has now been demonstrated in a range of other block copolymer systems. These polymers have been termed baroplastics. However, in each case, the order-to-disorder transition, which gives rise to the accompanying change in rheology from soft solid to melt, was observed at temperatures far exceeding the glass transition temperatures (T(g)) of both components. Here we show that baroplastic systems containing nanophase domains of one high-T(g) and one low-T(g) component can exhibit melt-like flow under pressure at ambient temperature through an apparent semi-solid partial mixing mechanism that substantially preserves the high-T(g) phase. These systems were shredded and remoulded ten times with no evident property degradation. Baroplastics with low-temperature formability promise lower energy consumption in manufacture and processing, reduced use of additives, faster production and improved recyclability, and also provide potential alternatives to current thermoplastic elastomers, rubber-modified plastics, and semi-crystalline polymers.
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Affiliation(s)
- Juan A Gonzalez-Leon
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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21
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Cho J. A Landau free energy for diblock copolymers with compressibility difference between blocks. J Chem Phys 2003. [DOI: 10.1063/1.1599278] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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22
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Cavicchi KA, Lodge TP. Self-Diffusion and Tracer Diffusion in Sphere-Forming Block Copolymers. Macromolecules 2003. [DOI: 10.1021/ma0346815] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kevin A. Cavicchi
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455
| | - Timothy P. Lodge
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455
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23
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Ryu DY, Lee DJ, Kim JK, Lavery KA, Russell TP, Han YS, Seong BS, Lee CH, Thiyagarajan P. Effect of hydrostatic pressure on closed-loop phase behavior of block copolymers. PHYSICAL REVIEW LETTERS 2003; 90:235501. [PMID: 12857269 DOI: 10.1103/physrevlett.90.235501] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2003] [Indexed: 05/24/2023]
Abstract
The effect of hydrostatic pressure (P) on closed-loop phase behavior of deuterated polystyrene-block-poly(n-pentyl methacrylate) copolymers [dPS-PnPMA] was investigated by using small-angle neutron scattering and birefringence. For P<20.7 bar, dPS-PnPMA exhibited a lower disorder-to-order transition temperature (T(LDOT)) at 175 degrees C, and then an upper order-to-disorder transition temperature (T(UODT)) at 255 degrees C. With increasing pressure both T(LDOT) and T(UODT) were markedly changed, where dT(LDOT)/dP was 725 degrees C/kbar and dT(UODT)/dP was -725 degrees C/kbar. These are consistent with predictions by the Clausius-Clapeyron equation using measured values of the volume and enthalpy changes of both transitions. The large pressure coefficients imply that the closed-loop phase behavior observed for PS-PnPMA is an entropic-driven phase transition.
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Affiliation(s)
- Du Yeol Ryu
- Department of Chemical Engineering and Polymer Research Institute, Electronic and Computer Engineering Divisions, Pohang University of Science and Technology, Kyungbuk 790-784, Korea
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24
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Ruzette AVG, Mayes AM, Pollard M, Russell TP, Hammouda B. Pressure Effects on the Phase Behavior of Styrene/n-Alkyl Methacrylate Block Copolymers. Macromolecules 2003. [DOI: 10.1021/ma021394c] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - B. Hammouda
- Cold Neutron Research Facility, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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25
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Jiang S, Jiang W, Wolf BA, An L, Jiang B. Pressure-Induced Compatibility in PEO/P(EO- b-DMS) Polymer Mixtures. Macromolecules 2002. [DOI: 10.1021/ma012054e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shichun Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China, and Institute für physikalische Chemie, Johannes Gutenberg-Universität, Jakob-Welder Weg 13, D-55099 Mainz, Germany
| | - Wei Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China, and Institute für physikalische Chemie, Johannes Gutenberg-Universität, Jakob-Welder Weg 13, D-55099 Mainz, Germany
| | - Bernhard A. Wolf
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China, and Institute für physikalische Chemie, Johannes Gutenberg-Universität, Jakob-Welder Weg 13, D-55099 Mainz, Germany
| | - Lijia An
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China, and Institute für physikalische Chemie, Johannes Gutenberg-Universität, Jakob-Welder Weg 13, D-55099 Mainz, Germany
| | - Bingzheng Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China, and Institute für physikalische Chemie, Johannes Gutenberg-Universität, Jakob-Welder Weg 13, D-55099 Mainz, Germany
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26
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Affiliation(s)
- Junhan Cho
- Department of Polymer Science and Engineering, and Hyperstructured Organic Materials Research Center, Dankook University, San-8, Hannam-dong, Yongsan-gu, Seoul 140-714, Korea
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27
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Vogt BD, Watkins JJ. Phase Behavior of Diblock Copolymers Dilated with Light Alkanes: Influence of Solvent Compressibility on Upper and Lower Ordering Transitions. Macromolecules 2002. [DOI: 10.1021/ma012154k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bryan D. Vogt
- Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003
| | - James J. Watkins
- Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003
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28
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Some anomalies in pressure-induced ordering of glassy spheres in a rubbery matrix of a microphase-separated triblock copolymer. POLYMER 2002. [DOI: 10.1016/s0032-3861(01)00780-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Schwahn D, Frielinghaus H, Mortensen K, Almdal K. Abnormal Pressure Dependence of the Phase Boundaries in PEE−PDMS and PEP−PDMS Binary Homopolymer Blends and Diblock Copolymers. Macromolecules 2001. [DOI: 10.1021/ma0002545] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dietmar Schwahn
- Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany, and Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - Henrich Frielinghaus
- Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany, and Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - Kell Mortensen
- Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany, and Risø National Laboratory, DK-4000 Roskilde, Denmark
| | - Kristoffer Almdal
- Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany, and Risø National Laboratory, DK-4000 Roskilde, Denmark
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30
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Frielinghaus H, Pedersen WB, Larsen PS, Almdal K, Mortensen K. End Effects in Poly(styrene)/Poly(ethylene oxide) Copolymers. Macromolecules 2001. [DOI: 10.1021/ma001477y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Henrich Frielinghaus
- Risø National Laboratory, Department of Solid State Physics, DK-4000 Roskilde, Denmark
| | | | - Peter Sommer Larsen
- Risø National Laboratory, Department of Solid State Physics, DK-4000 Roskilde, Denmark
| | - Kristoffer Almdal
- Risø National Laboratory, Department of Solid State Physics, DK-4000 Roskilde, Denmark
| | - Kell Mortensen
- Risø National Laboratory, Department of Solid State Physics, DK-4000 Roskilde, Denmark
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31
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Grigoriew H, Chmielewski A, Amenitsch H. Structural temperature transformation of the cellulose–water system using time-resolved SAXS. POLYMER 2001. [DOI: 10.1016/s0032-3861(00)00335-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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32
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Lefebvre AA, Lee JH, Balsara NP, Hammouda B. Neutron Scattering from Pressurized Polyolefin Blends near the Limits of Metastability. Macromolecules 2000. [DOI: 10.1021/ma000462x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amy A. Lefebvre
- Department of Chemical Engineering, Chemistry and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Joon H. Lee
- Department of Chemical Engineering, Chemistry and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Nitash P. Balsara
- Department of Chemical Engineering, Chemistry and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Boualem Hammouda
- National Institute of Standards and Technology, Building 235, E 151, Gaithersburg, Maryland 20899
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33
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Watkins JJ, Brown GD, RamachandraRao VS, Pollard MA, Russell TP. Phase Separation in Polymer Blends and Diblock Copolymers Induced by Compressible Solvents. Macromolecules 1999. [DOI: 10.1021/ma9906377] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rittig F, Fleischer G, Kärger J, Papadakis CM, Almdal K, Štěpánek P. Anisotropic Self-Diffusion in a Hexagonally Ordered Asymmetric PEP−PDMS Diblock Copolymer Studied by Pulsed Field Gradient NMR. Macromolecules 1999. [DOI: 10.1021/ma990548u] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Frank Rittig
- Fakultät für Physik und Geowissenschaften, Institut für Experimentelle Physik I, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
| | - Gerald Fleischer
- Fakultät für Physik und Geowissenschaften, Institut für Experimentelle Physik I, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
| | - Jörg Kärger
- Fakultät für Physik und Geowissenschaften, Institut für Experimentelle Physik I, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
| | - Christine M. Papadakis
- Fakultät für Physik und Geowissenschaften, Institut für Experimentelle Physik I, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
| | - Kristoffer Almdal
- Condensed Matter Physics and Chemistry Department, Risø National Laboratory, P.O. Box 49, DK-4000 Roskilde, Denmark
| | - Petr Štěpánek
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, CZ-16202 Prague, Czech Republic
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Lefebvre AA, Lee JH, Balsara NP, Hammouda B, Krishnamoorti R, Kumar S. Relationship between Internal Energy and Volume Change of Mixing in Pressurized Polymer Blends. Macromolecules 1999. [DOI: 10.1021/ma990392y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. A. Lefebvre
- Department of Chemical Engineering, Chemistry, and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201; National Institute of Standards and Technology, Building 235, E 151, Gaithersburg, Maryland 20899; Department of Chemical Engineering, University of Houston, 4800 Calhoun, Houston, Texas 77204; and Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - J. H. Lee
- Department of Chemical Engineering, Chemistry, and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201; National Institute of Standards and Technology, Building 235, E 151, Gaithersburg, Maryland 20899; Department of Chemical Engineering, University of Houston, 4800 Calhoun, Houston, Texas 77204; and Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - N. P. Balsara
- Department of Chemical Engineering, Chemistry, and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201; National Institute of Standards and Technology, Building 235, E 151, Gaithersburg, Maryland 20899; Department of Chemical Engineering, University of Houston, 4800 Calhoun, Houston, Texas 77204; and Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - B. Hammouda
- Department of Chemical Engineering, Chemistry, and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201; National Institute of Standards and Technology, Building 235, E 151, Gaithersburg, Maryland 20899; Department of Chemical Engineering, University of Houston, 4800 Calhoun, Houston, Texas 77204; and Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - R. Krishnamoorti
- Department of Chemical Engineering, Chemistry, and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201; National Institute of Standards and Technology, Building 235, E 151, Gaithersburg, Maryland 20899; Department of Chemical Engineering, University of Houston, 4800 Calhoun, Houston, Texas 77204; and Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
| | - S. Kumar
- Department of Chemical Engineering, Chemistry, and Materials Science, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201; National Institute of Standards and Technology, Building 235, E 151, Gaithersburg, Maryland 20899; Department of Chemical Engineering, University of Houston, 4800 Calhoun, Houston, Texas 77204; and Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
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Montes H, Monkenbusch M, Willner L, Rathgeber S, Fetters L, Richter D. Neutron spin echo investigation of the concentration fluctuation dynamics in melts of diblock copolymers. J Chem Phys 1999. [DOI: 10.1063/1.478891] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pollard M, Russell TP, Ruzette AV, Mayes AM, Gallot Y. The Effect of Hydrostatic Pressure on the Lower Critical Ordering Transition in Diblock Copolymers. Macromolecules 1998. [DOI: 10.1021/ma980316f] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Y. Gallot
- Institut Charles Sadron, Strasbourg, France
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Hino T, Prausnitz JM. Lower and Upper Critical Ordering Temperatures in Compressible Diblock Copolymer Melts from a Perturbed Hard-Sphere-Chain Equation of State. Macromolecules 1998. [DOI: 10.1021/ma970796v] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Toshiaki Hino
- Department of Chemical Engineering, University of California, Berkeley, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720
| | - John M. Prausnitz
- Department of Chemical Engineering, University of California, Berkeley, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720
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Migler KB, Han CC. Static and Kinetic Study of a Pressure Induced Order−Disorder Transition: Birefringence and Neutron Scattering. Macromolecules 1998. [DOI: 10.1021/ma971295c] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kalman B. Migler
- Building 224, Room B210, Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Charles C. Han
- Building 224, Room B210, Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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Steinhoff B, Rüllmann M, Wenzel M, Junker M, Alig I, Oser R, Stühn B, Meier G, Diat O, Bösecke P, Stanley HB. Pressure Dependence of the Order-to-Disorder Transition in Polystyrene/Polyisoprene and Polystyrene/Poly(methylphenylsiloxane) Diblock Copolymers. Macromolecules 1998. [DOI: 10.1021/ma970659y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | | | | | - G. Meier
- MPI Polymerforschung, P.O. Box 3148, D-55021 Mainz, Germany
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Guenza M, Schweizer KS. Local and Microdomain Concentration Fluctuation Effects in Block Copolymer Solutions. Macromolecules 1997. [DOI: 10.1021/ma970173h] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marina Guenza
- Departments of Materials Science & Engineering and Chemistry and Materials Research Laboratory, University of Illinois, 1304 West Green Street, Urbana, Illinois 61801
| | - Kenneth S. Schweizer
- Departments of Materials Science & Engineering and Chemistry and Materials Research Laboratory, University of Illinois, 1304 West Green Street, Urbana, Illinois 61801
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