ICCAS OpenIR
Processable polyimides with high glass transition temperature and high storage modulus retention at 400 degrees C
Hao, JY; Hu, AJ; Gao, SQ; Wang, XC; Yang, SY
2001-09-01
Source PublicationHIGH PERFORMANCE POLYMERS
ISSN0954-0083
Volume13Issue:3Pages:211-224
AbstractEnd-capped polyimide precursor solutions in ethyl alcohol were prepared by incorporating carbonyl groups into the polymer backbone of a second-generation PMR (in situ polymerization of monomer reactants) polyimide, PMR-II-50, which exhibited good features as a matrix resin for carbon-fibre-reinforced composites. Cured polyimides were prepared in an analogous process as the PMR-II polyimides. The thermal and thermo-oxidative stability of the cured polyimides was systemically investigated. It was found that the cured polyimide containing a 1:1 mole ratio of the carbonyl group [-C(O)-] to the hexafluoroisopropyl group [-C(CF3)(2)-] in the polymer backbone possessed a very high glass transition temperature (440 degreesC) and an excellent thermal decomposition temperature (576 degreesC). The onset temperature of the storage modulus curve was measured at about 400 degreesC with-high retention (> 55%) of the storage modulus at 400 degreesC, compared to 10-15% of the corresponding PMR-II polyimide. Carbon-fibre-reinforced composites also showed a high onset temperature of the storage modulus (420 degreesC) and high storage modulus retention (> 85%) at 400 degreesC. Preliminary results indicated that the composite laminate exhibited excellent mechanical strength retention at 371 degreesC, which was superior to that of CF/PMR-II composites.
Indexed BySCI
Language英语
WOS IDWOS:000171682100027
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/77884
Collection中国科学院化学研究所
Corresponding AuthorYang, SY
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, State Key Lab Engn Phys, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Hao, JY,Hu, AJ,Gao, SQ,et al. Processable polyimides with high glass transition temperature and high storage modulus retention at 400 degrees C[J]. HIGH PERFORMANCE POLYMERS,2001,13(3):211-224.
APA Hao, JY,Hu, AJ,Gao, SQ,Wang, XC,&Yang, SY.(2001).Processable polyimides with high glass transition temperature and high storage modulus retention at 400 degrees C.HIGH PERFORMANCE POLYMERS,13(3),211-224.
MLA Hao, JY,et al."Processable polyimides with high glass transition temperature and high storage modulus retention at 400 degrees C".HIGH PERFORMANCE POLYMERS 13.3(2001):211-224.
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