2003 Fiscal Year Final Research Report Summary
Study on Control of Higher Order Structure of Composites by In-situ Polymerization and Their Mechanical Properties
| Project/Area Number |
13450383
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
高分子合成
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| Research Institution | Sophia University |
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Principal Investigator |
SANUI Kohei Sophia University, Faculty of Science and Technology, Professor, 理工学部, 教授 (30053664)
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| Project Period (FY) |
2001 – 2003
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| Keywords | In-situ polymerization / Composite materials / Control of higher order structure / Mechanical properties / Matrix polymer / Reinforcing polymer / Acid-base interaction / Poly(4-vinylpyridine -co-styrene) / スチレン共重合体 |
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| Research Abstract |
The purpose of this project is to clarify the relationship between the higher order structure and the mechanical properties of the polymer composites prepared by in-situ polymerization and then to establish a principle of molecular design of nano-composite materials. The following results were obtained in this project.
(1)High-performance composites of reinforcing polymers and flexible matrix polymers were prepared by two in-situ polymerization methods : by the in-situ method(I), where polymerization of monomers of reinforcing polymers was carried out in a solution of flexible matrix polymers, and by the in-situ method(II), where polymerization of monomers of flexible matrix polymers was carried out in a solution of reinforcing polymers. The in-situ method(I) was found to give polymer composites with higher tensile strength than the in-situ method(II), because the in-situ method(I) gave much more fine dispersion of reinforcing polymer in the resulting polymer composites.
(2)The acid-base interaction was found to be best for preparation of high performance composites of reinforcing polymers and flexible matrix polymers by the in-situ polymerization. Furthermore, the tensile strengths of the composite films prepared by the in-situ polymerization method were much higher than those of the films prepared by the blend method.
(3)Free carboxylic acid groups were introduced into side chains of polyimide(PI) in order to improve the mechanical properties of the poly(4-vinylpyridine-co-styrene) (P4VPy-St) and PI composites, and the carboxyl group content dependence of the tensile strength of the resulting composite films was investigated. The tensile strength of the resulting composite films increased with increasing carboxyl group content in PI and was higher than that of either of the individual polymer components.
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Research Products
(6 results)
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[Book] 物質の科学・有機高分子2002
Author(s)
西 敏夫, 讃井浩平, 平川暁子
Total Pages
257
Publisher
(財)放送大学教育振興会
Description
「研究成果報告書概要(和文)」より
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