Fractionation and crystallization of wholly aromatic rigid polymer
| Project/Area Number |
16550177
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Okayama University |
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Principal Investigator |
SHIMAMURA Kaoru Okayama University, Graduate School of Natural Science and Technology, Professor, 大学院・自然科学研究科, 教授 (80013506)
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| Co-Investigator(Kenkyū-buntansha) |
UCHIDA Tetsuya Okayama University, Graduate School of Natural Science and Technology, Assistant, 大学院・自然科学研究科, 助手 (90284083)
KIMURA Kunio Okayama University, Graduate School of Environmental Science, Professor, 大学院・環境学研究科, 教授 (40274013)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2005: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2004: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | rigid Polymer / fractionation / distribution of molecular length / single crystal / crystallization |
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| Research Abstract |
Fractionation of the rigid polymer, poly(p-phenylene benzobisthiazole) (PBZT) was carried out in dilute solution in conc. methane sulfuric acid using silica gels as packing material of a column. Several combinations of the average chain length of the fractionating materials and the average pore diameter of the gels were examined to improve fractionation resolution. The gels with the average pore diameter near to the average chain length resulted in high fractionation resolution. Single crystals of the fractionated and unfractionated PBZT's were observed by TEM. Both single crystals were fundamentally composed of rod crystals with the chain orienting normal to the rods. The unfractionated PBZT made a cluster of parallel rod crystals, where longer chains penetrated a few rod crystals leaving their chain ends within the crystalline core. On the contrary, with the fractionated polymer, extended- chain rod-like crystals were dispersed isolated from each other. This morphology enables us to estimate the chain length visibly by TEM, for which a few milligrams of the material is enough for the observation.
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Report
(3 results)
Research Products
(2 results)
