|
1
|
Zhang R, Fall WS, Hall KW, Gehring GA, Zeng X, Ungar G. Roughening Transition and Quasi-continuous Melting of Monolayers of Ultra-long Alkanes: Why Bulk Polymer Melting Is Strongly First-Order. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01377] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ruibin Zhang
- Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
- State Key Laboratory for Mechanical Behavior of Materials, Shaanxi International Research Centre for Soft Materials, Xi’an Jiaotong University, Xi’an 710049, China
- Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - William S. Fall
- State Key Laboratory for Mechanical Behavior of Materials, Shaanxi International Research Centre for Soft Materials, Xi’an Jiaotong University, Xi’an 710049, China
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK
- Institut Charles Sadron, Université de Strasbourg, CNRS, UPR 22, 67034 Strasbourg, France
| | - Kyle Wm. Hall
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Gillian A. Gehring
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK
| | - Xiangbing Zeng
- Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - Goran Ungar
- Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
- State Key Laboratory for Mechanical Behavior of Materials, Shaanxi International Research Centre for Soft Materials, Xi’an Jiaotong University, Xi’an 710049, China
- Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
| |
Collapse
|
|
2
|
Kohn P, Huettner S, Steiner U, Sommer M. Fractionated Crystallization of Defect-Free Poly(3-hexylthiophene). ACS Macro Lett 2012; 1:1170-1175. [PMID: 35607189 DOI: 10.1021/mz3003769] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fractionated crystallization (FC), a chain-sorting mechanism by length, is identified in well-defined, low molecular weight, and defect-free regioregular poly(3-hexylthiophene) by X-ray scattering and calorimetry of bulk samples. While wide-angle X-ray scattering (WAXS) qualitatively suggests that the degree of crystallinity is similar in all investigated samples, the melting enthalpies are largely different. We ascribe this to intricacies in the integration of the melting and crystallization peaks in calorimetric experiments, which is caused by FC occurring over a large temperature range. The extent of FC decreases with increasing molecular weight and increases with increasing polydispersity. The temperature-dependent investigation of the long period LP and the (100)-WAXS reflection of a sample in which FC is absent allows to disentangle effects from main-chain and side-chain crystallization.
Collapse
Affiliation(s)
- P. Kohn
- Cavendish Laboratory, Department of Physics, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - S. Huettner
- Cavendish Laboratory, Department of Physics, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - U. Steiner
- Cavendish Laboratory, Department of Physics, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - M. Sommer
- Melville Laboratory
for Polymer Synthesis, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| |
Collapse
|
|
3
|
Cong Y, Liu H, Wang D, Zhao B, Yan T, Li L, Chen W, Zhong Z, Lin MC, Chen HL, Yang C. Stretch-Induced Crystallization through Single Molecular Force Generating Mechanism. Macromolecules 2011. [DOI: 10.1021/ma201249y] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuanhua Cong
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
| | - Hao Liu
- CAS Key Lab for Softmatter Chemistry, University of Science and Technology of China, Hefei, China
| | - Daoliang Wang
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
| | - Baijin Zhao
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
| | - Tingzi Yan
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
| | - Liangbin Li
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
- CAS Key Lab for Softmatter Chemistry, University of Science and Technology of China, Hefei, China
| | | | | | | | | | | |
Collapse
|
|
4
|
Zeng XB, Xie F, Ungar G. Semicrystalline and Superlattice Structures in an Asymmetrically Methyl-Branched Long-Chain Alkane. Macromolecules 2007. [DOI: 10.1021/ma070992u] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- X. B. Zeng
- Department of Engineering Materials, Sheffield University, Sheffield S1 3JD, U.K
| | - F. Xie
- Department of Engineering Materials, Sheffield University, Sheffield S1 3JD, U.K
| | - G. Ungar
- Department of Engineering Materials, Sheffield University, Sheffield S1 3JD, U.K
| |
Collapse
|
|
5
|
Zeng X, Ungar G, Spells SJ, King SM. Real-Time Neutron Scattering Study of Transient Phases in Polymer Crystallization. Macromolecules 2005. [DOI: 10.1021/ma0510486] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiangbing Zeng
- Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, UK; Sheffield Hallam University, City Campus, Sheffield S1 1WB, UK; and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK
| | - Goran Ungar
- Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, UK; Sheffield Hallam University, City Campus, Sheffield S1 1WB, UK; and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK
| | - Stephen J. Spells
- Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, UK; Sheffield Hallam University, City Campus, Sheffield S1 1WB, UK; and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK
| | - Stephen M. King
- Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD, UK; Sheffield Hallam University, City Campus, Sheffield S1 1WB, UK; and ISIS, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK
| |
Collapse
|
|
6
|
Ungar G, Putra EGR, de Silva DSM, Shcherbina MA, Waddon AJ. The Effect of Self-Poisoning on Crystal Morphology and Growth Rates. ADVANCES IN POLYMER SCIENCE 2005. [DOI: 10.1007/b107232] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
|
|
7
|
Zeng XB, Ungar G. Triple-Layer Superlattice in Deuterium-Labeled Binary Ultralong Alkanes: A Study by Small-Angle Neutron and X-ray Scattering. Macromolecules 2003. [DOI: 10.1021/ma034370u] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- X. B. Zeng
- Department of Engineering Materials, Sheffield University, Sheffield S1 3JD, UK
| | - G. Ungar
- Department of Engineering Materials, Sheffield University, Sheffield S1 3JD, UK
| |
Collapse
|