高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 508.

• 研究快报 • 上一篇    下一篇

含磷全芳族热致液晶共聚酯的合成及热性能

陈晓婷, 唐旭东, 王玉忠   

  1. 四川大学化学学院, 降解与阻燃高分子材料研究中心, 成都 610064
  • 收稿日期:2001-07-02 出版日期:2002-03-24 发布日期:2002-03-24
  • 通讯作者: 王玉忠(1961年出生),男,博士,教授,博士生导师,主要从事高聚物阻燃和生物降解高分子研究.E-mail:yzwang@mail.sc.cninfo.net E-mail:yzwang@mail.sc.cninfo.net

Synthesis and Thermal Behavior of Phosphorus-containing Thermotropic Wholly Aromatic Copolyesters

CHEN Xiao-Ting, TANG Xu-Dong, WANG Yu-Zhong    

  1. Research Center for Degradable and Flame-Retardant Polymeric Materials, School of Chemistry, Sichuan University, Chengdu 610064, China
  • Received:2001-07-02 Online:2002-03-24 Published:2002-03-24

关键词: 液晶共聚酯, 热性能, 阻燃

Abstract: A series of flame retardant thermotropic wholly aromatic copolyesters were derived from acetylated 2-(6-oxido-6H-dibenz<c,e><1,2>oxa phosphorin-6-yl)-1,4-dihydroxy phenylene(DOPO-HQ), p-acetoxybenzoic acid(p-AHB), terephthalic acid(TPA) and isophthalic acid(IPA) by melting polycondensation. The structure and basic properties of polymers, such as glass transition temperature(Tg), melting temperature(Tm), thermal stability, and liquid crystallinity were investigated by FTIR, elemental analysis, differential scanning calorimetry(DSC), thermogravimetry analysis(TGA), and thermal polarized optical microscope. The copolyesters have relative high Tg values which range from 456 to 465 K. The Tm obtained from DSCcurves(P-20 and P-25) and initial flow temperatures(Tf) observed on hotstage polarizing microscope are from 544 to 568 K. The decomposing temperatures(Td50%) in nitrogen range from 704 to 735 K, and char yields at 923 Kare 41~52. All the copolyesters, except P-40, are thermotopic and nematic.

Key words: Thermotropic copolyesters, Thermal behaviour, Flame retardancy

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