標題: Miscibility in blends of liquid crystalline poly(p-oxybenzoate-co-p-phenyleneisophthalate) and polycarbonate
作者: Wei, KH
Jang, HC
Ho, JC
交大名義發表
材料科學與工程學系
National Chiao Tung University
Department of Materials Science and Engineering
關鍵字: miscibility;transesterification;liquid crystalline polymer blends
公開日期: 1-七月-1997
摘要: The miscibility of liquid crystalline poly(p-oxybenzoate-co-p-phenyleneisophthalate) (HIQ) and polycarbonate (PC) was investigated with differential scanning calorimetry (d.s.c.). It was found that blends of liquid crystalline HIQ and PC showed a single glass transition temperature across the whole composition range. Annealing these blends at temperatures slightly above the melting point of HIQ, ester exchange occurred as confirmed both by i.r. and n.m.r. spectroscopy. The apparent miscibility of HIQ and PC was caused by this reaction. The blends retained liquid crystalline characteristics in the first few reaction minutes. As the transesterification continued, the bisphenol-A segment in PC reacted with both isophthalate and oxybenzoate segments in HIQ. This resulted in amorphous polymers. These amorphous polymers exhibited a single glass transition temperature higher than that for both pure polymers. (C) 1997 Elsevier Science Ltd.
URI: http://hdl.handle.net/11536/454
ISSN: 0032-3861
期刊: POLYMER
Volume: 38
Issue: 14
起始頁: 3521
結束頁: 3532
顯示於類別:期刊論文


文件中的檔案:

  1. A1997XF31700012.pdf