|
1
|
Zaręba J, Jenczyk J, Dobies M, Makrocka-Rydzyk M, Woźniak-Braszak A, Jarek M, Jancelewicz M, Banaszak M. Block copolymer interfaces investigated by means of NMR, atomic force microscopy and dielectric spectroscopy. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
|
|
2
|
Chintapalli M, Timachova K, Olson KR, Mecham SJ, DeSimone JM, Balsara NP. Lithium Salt Distribution and Thermodynamics in Electrolytes Based on Short Perfluoropolyether- block-Poly(ethylene oxide) Copolymers. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b01637] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mahati Chintapalli
- Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Ksenia Timachova
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kevin R. Olson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Sue J. Mecham
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Joseph M. DeSimone
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Nitash P. Balsara
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Joint Center for Energy Storage Research (JCESR), Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|
|
3
|
Sakurai S, Shirouchi K, Munakata S, Kurimura H, Suzuki S, Watanabe J, Oda T, Shimizu N, Tanida K, Yamamoto K. Morphology Reentry with a Change in Degree of Chain Asymmetry in Neat Asymmetric Linear A1BA2 Triblock Copolymers. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01606] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Shinichi Sakurai
- Department
of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki,
Sakyo-ku, Kyoto 606-8585, Japan
- Institute
of Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Kimiyuki Shirouchi
- Department
of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki,
Sakyo-ku, Kyoto 606-8585, Japan
| | - Shunsuke Munakata
- Department
of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki,
Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroyuki Kurimura
- Electronic
Materials Research Department, Shibukawa Plant, Denka Company Limited, 1135 Nakamura, Shibukawa-City, Gunma 377-8520, Japan
| | - Shigeru Suzuki
- Advanced
Polymer Research Department, Advanced Technologies Research Institute, Denka Company Limited, 3-5-1 Asahi-Machi, Machida-City, Tokyo 194-8560, Japan
| | - Jun Watanabe
- Advanced
Polymer Research Department, Advanced Technologies Research Institute, Denka Company Limited, 3-5-1 Asahi-Machi, Machida-City, Tokyo 194-8560, Japan
| | - Takeshi Oda
- Research
and Development Department, Denka Company Limited, 2-1-1 Nihonbashi-Muromachi,
Chuo-ku, Tokyo 103-8338, Japan
| | - Norihiro Shimizu
- Denka Company Limited, 2-1-1 Nihonbashi-Muromachi,
Chuo-ku, Tokyo 103-8338, Japan
| | | | | |
Collapse
|
|
4
|
Chintapalli M, Timachova K, Olson KR, Banaszak M, Thelen JL, Mecham SJ, DeSimone JM, Balsara NP. Incipient microphase separation in short chain perfluoropolyether-block-poly(ethylene oxide) copolymers. SOFT MATTER 2017; 13:4047-4056. [PMID: 28517013 DOI: 10.1039/c7sm00738h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Incipient microphase separation is observed by wide angle X-ray scattering (WAXS) in short chain multiblock copolymers consisting of perfluoropolyether (PFPE) and poly(ethylene oxide) (PEO) segments. Two PFPE-PEO block copolymers were studied; one with dihydroxyl end groups and one with dimethyl carbonate end groups. Despite having a low degree of polymerization (N ∼ 10), these materials exhibited significant scattering intensity, due to disordered concentration fluctuations between their PFPE-rich and PEO-rich domains. The disordered scattering intensity was fit to a model based on a multicomponent random phase approximation to determine the value of the interaction parameter, χ, and the radius of gyration, Rg. Over the temperature range 30-90 °C, the values of χ were determined to be very large (∼2-2.5), indicating a high degree of immiscibility between the PFPE and PEO blocks. In PFPE-PEO, due to the large electron density contrast between the fluorinated and non-fluorinated block and the high value of χ, disordered scattering was detected at intermediate scattering angles, (q ∼ 2 nm-1) for relatively small polymer chains. Our ability to detect concentration fluctuations was enabled by both a relatively large value of χ and significant scattering contrast.
Collapse
Affiliation(s)
- Mahati Chintapalli
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
| | | | | | | | | | | | | | | |
Collapse
|
|
5
|
Wołoszczuk S, Jurga S, Banaszak M. Towards entropy-driven interstitial micelles at elevated temperatures from selective A1BA2 triblock solutions. Phys Rev E 2016; 94:022502. [PMID: 27627353 DOI: 10.1103/physreve.94.022502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Indexed: 11/07/2022]
Abstract
We simulate selective A1BA2-A and A1BA2-B triblock solutions (that is, mixtures of the A1BA2 triblock with a solvent of either type A or type B) using a lattice Monte Carlo method. Although the simulated triblock chains are compositionally symmetric in terms of the A to B volume ratio, the A1 block is significantly shorter than the A2 block. For the pure A1BA2 melt the phase behavior is relatively well known, including the existence and stability of the recently discovered interstitial micelles which were found at the very strong segregation limit. In this paper, we investigate the stability of the interstitial micelles as a function of triblock volume fraction in a selective solvent of either type A or type B. The main finding of this paper is that adding a selective solvent of type A shifts the stability of the interstitial micelles into significantly higher temperatures which may provide a pathway towards experimental studies of interstitial micelles in real triblock solutions. We also find that adding selective solvents to the A1BA2 melt gives rise to a variety of nonlamellar nanostructures for temperatures and compositions at which the interstitial micelles are stable.
Collapse
Affiliation(s)
- S Wołoszczuk
- Faculty of Physics, Adam Mickiewicz University, ulica Umultowska 85, 61-614 Poznan, Poland
| | - S Jurga
- Department of Macromolecular Physics, NanoBioMedical Centre, Adam Mickiewicz University, ulica Umultowska 85, 61-614 Poznan, Poland
| | - M Banaszak
- Faculty of Physics, Adam Mickiewicz University, ulica Umultowska 85, 61-614 Poznan, Poland
| |
Collapse
|
|
6
|
Knychała P, Dzięcielski M, Banaszak M, Balsara NP. Phase Behavior of Ionic Block Copolymers Studied by a Minimal Lattice Model with Short-Range Interactions. Macromolecules 2013. [DOI: 10.1021/ma400078y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. Knychała
- Faculty of Physics, A. Mickiewicz University, ul. Umultowska 85, 61-614
Poznan, Poland
| | - M. Dzięcielski
- Faculty of Physics, A. Mickiewicz University, ul. Umultowska 85, 61-614
Poznan, Poland
| | - M. Banaszak
- Faculty of Physics, A. Mickiewicz University, ul. Umultowska 85, 61-614
Poznan, Poland
| | - N. P. Balsara
- Environmental
Energy Technologies
Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California,
94720, United States
- Department
of Chemical and Biomolecular
Engineering, University of California,
Berkeley, California, 94720, United States
| |
Collapse
|