2011 Fiscal Year Final Research Report
Polymer crystallization via non-equilibrium intermediate state and control of higher order structure
| Project/Area Number |
20245045
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Polymer/Textile materials
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NISHIDA Koji 京都大学, 化学研究所, 准教授 (80189290)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 非平衡中間体 / 高分子結晶化 / 高分子高次構造制御 |
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| Research Abstract |
We have studied structure and structure formation mechanism of non-equilibrium intermediate states of polymers during the crystallization process using small-and wide-angle X-ray scattering, small-and wide-angle neutron scattering and light scattering. It was found in the study on polyamide that the structure formation during the incubation period before crystallization was closely related to the melt memory effects. We also investigated structure of intermediate state(or precursor) of shish-kebab during the shear-induced crystallization using micro-beam small-and wide-angle X-ray scattering to find there exist crystallites. In addition we revealed that the role of molecular weight in the shish-kebab formation using small-angle X-ray and neutron scattering. In the study of mesomorphic phase of isotactic polypropylene we found the best heating rate to obtain a giant single crystals. These findings surely provide many new insights on the crystallization mechanism via the non-equilibrium intermediate states and show new ways how to control the higher order structure of polymers.
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[Journal Article] Effect of Polylactide Stereocomplex on the Crystallization Behavior of Poly(L-lactic acid)2009
Author(s)
Rahman N, Kawai T, Matsuba G, Nishida K, Kanaya T, Watanabe H, Okamoto H, Kato M, Uski A, Matsuda M, Nakajima K, Honmma N
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Journal Title
Macromolecules
Volume: 42
Pages: 4739-4745
Peer Reviewed
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