应用化学 ›› 1993, Vol. 0 ›› Issue (6): 66-70.

• 研究论文 • 上一篇    下一篇

环氧乙烷和环氧丙烷共聚体系的等温结晶和熔融

齐力, 宋永贤, 彭新生, 陈东霖   

  1. 中国科学院长春应用化学研究所 130022 长春
  • 收稿日期:1993-03-27 修回日期:1993-09-18 出版日期:1993-12-10 发布日期:1993-12-10

ISOTHERMAL CRYSTALLIZATION AND MELTING OF ETHYLENE OXIDEPROPYLENE OXIDE COPOLYMER

Qi Li, Song Yongxian, Peng Xinsheng, Cben Donglin   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun
  • Received:1993-03-27 Revised:1993-09-18 Published:1993-12-10 Online:1993-12-10

摘要: 环氧乙烷(EO)和环氧丙烷(PO)共聚体系的等温结晶前期符合Avrami方程。PO组分含量增加,Avrami指数n值由1.8到2.4,体系的结晶生长速率与共聚体系的组成和结晶度有关,EO/PO共聚体系的平衡熔点随PO含量的增加而降低。随Tc增大,△Hm与△Sm呈线性降低。

关键词: 环氧乙烷, 环氧丙烷, 共聚物, 等温结晶, 动力学

Abstract: The kinetics of isothermal crystallization of ethylene oxide and propylene oxide copolymers has been investigated by differential scanning calorimetry. The values of Avrami exponent n were found as 1.8~2.4. The nueleanlon process in crystallization temperature takes place according to regime Ⅱ The eqilibrium melting points of EO/PO copolymer decrease with increasing content of PO. The crystal growtb rate Gis in dependence on the composition of the copolymer and the crystalization temparature.

Key words: ethylene oxide, propylene oxide, copolymer, isothermal crystallization, kinetics