Structure, chain orientation, and properties in thin films of aromatic polyimides with various chain rigidities
SCIE
SCOPUS
- Title
- Structure, chain orientation, and properties in thin films of aromatic polyimides with various chain rigidities
- Authors
- Ree, M; Kim, K; Woo, SH; Chang, H
- Date Issued
- 1997-01-15
- Publisher
- AMER INST PHYSICS
- Abstract
- Several high temperature polyimides, as model polymers with various chain rigidities and chain orders, were synthesized through the polycondensation of p-phenylene diamine (PDA) with five different aromatic dianhydrides [i.e., pyromellitic dianhydride (PMDA), biphenyltetracarboxylic dianhydride (BPDA), 4,4'-oxydiphthalic anhydride (ODPA), benzophenonetetracarboxylic dianhydride (BTDA), and 4,4'-hexafluoroisopropylidenediphthalic anhydride (6F)], and investigated in terms of structure and properties. Both fully rodlike PMDA-PDA and ether-linked ODPA-PDA polyimides showed excellent orientation and poor ordering of chain in x-ray diffraction patterns, whereas both biphenyl-linked (BPDA-PDA) and carbonyl-linked (BTDA-PDA) polyimides exhibited excellent orientation and high ordering of chain. However, hexafluoroisopropylidene-linked 6F-PDA polyimide is structureless. The coherence length along the chain axis, which is a measure of chain rigidity and ordering, was estimated from (00l) peaks of x-ray diffraction patters: 6F-PDA (could not be measured)
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/10473
- DOI
- 10.1063/1.364210
- ISSN
- 0021-8979
- Article Type
- Article
- Citation
- JOURNAL OF APPLIED PHYSICS, vol. 81, no. 2, page. 698 - 708, 1997-01-15
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