高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (8): 1305.

• 论文 • 上一篇    下一篇

芳香聚醚酮酮晶体结构及其晶型变化的研究(Ⅰ)

柯杨船1, 吴忠文1, 郑玉斌1, 姬相玲1, 杨德才2   

  1. 1. 吉林大学化学系, 长春 130023;
    2. 中国科学院长春应用化学研究所高分子物理开放研究室
  • 收稿日期:1995-07-19 出版日期:1996-08-24 发布日期:1996-08-24
  • 通讯作者: 柯杨船,男,31岁,博士,讲师.
  • 作者简介:柯杨船,男,31岁,博士,讲师.
  • 基金资助:

    中国科学院高分子物理联合开放实验室资助;国家“863”重大项目

Crystal Structure and Its Transition for Poly(aryl ether ketone ketone) s(Ⅰ)

KE Yang-Chuan1, WU Zhong-Wen1, ZHENG Yu-Bin1, JI Xiang-Ling1, YANG De-Cai2   

  1. 1. Department of Chemistry, Jilin University, Changchun 130023;
    2. Laboratory of Polymer Physics, Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1995-07-19 Online:1996-08-24 Published:1996-08-24

摘要: 利用X射线及热分析技术研究了聚醚酮酮(PEKK)的溶剂诱导结晶及从玻璃态结晶和从熔融态结晶的行为。发现PEKK有两种晶型结构(Ⅰ和Ⅱ),晶型Ⅱ的形成与热历史和溶剂诱导有关,其熔点始终低于Ⅰ型10℃左右。PEKK的低温熔融峰与其分子链极化有关,而与热历史无关,此低温熔融峰热焓占总热焓2%~10%,其平衡熔点为409℃。

关键词: 聚醚酮酮多晶型, 热分析, 分子链极化

Abstract: Poly(aryl ether ketone ketone)s (PEKK) was a high-performance engineering plastics, By means of Wide Angle X-ray Diffraction(WAXD)and DifferentiaI Scanning Calorimetry( DSC) methods, PEKKsamples crystallized in solvent induction, from glass state and from melting state were studied.Crystal formsⅠand Ⅱfor PEKKwere found.The formation of crystal formⅡwas dependent on thermal history and solvent induction, and this form Ⅱhad melting point 10 ℃ or so lower than that of formⅠcrystallized from glass state.All PEKKsamples had low melting peaks which were relevant to the polarization of PEKKmolecular chain, while they had nothing to do with thermal history.The heat of fusion for PEKKlow melting peaks accounted for percentage of 2 to 10 or so of the whole heat of fusion, And PEKKhas its equilibrium melting point of 409℃.

Key words: Polymorphism of poly(aryl ether ketone ketone)s, Thermal analysis, Polarization of molecular chain

TrendMD: