- Lyotropic liquid crystalline poly(aryl ether ketone) copolymer containing phthalazinone moiety and biphenyl mesogen
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- 论文类型： 期刊论文
- 发表时间： 2007-08-01
- 发表刊物： EUROPEAN POLYMER JOURNAL
- 收录刊物： SCIE、EI、Scopus
- 卷号： 43
- 期号： 8
- 页面范围： 3683-3687
- ISSN号： 0014-3057
- 关键字： copolymerization; liquid-crystalline polymers (LCP); lyotropic; poly(ether ketones); phthalazinone
- 摘要： A novel lyotropic liquid crystalline material poly(aryl ether ketone) copolymer containing phthalazinone moiety and biphenyl mesogen named P-8515 was developed by a mild solution polycondensation method, The molecular weight (M-n) was 53,000 and the value of molecular weight distribution index (MDI) was 2.49 detected by GPC. The critical concentration (C*) of P-8515 was 36 wt% and P-8515 exhibited characteristic nematic lyotropic liquid crystalline phases in NMP solution at different concentrations and the phase morphology changed to a typical threaded texture when shear forces were induced from PLM observations. The T-g value was 238 degrees C and the value for 5% weight loss temperature was 515 degrees C in nitrogen from DSC and TGA determinations, respectively. (c) 2007 Elsevier Ltd. All rights reserved.
