环氧乙烷和环氧丙烷共聚体系的等温结晶和熔融  

ISOTHERMAL CRYSTALLIZATION AND MELTING OF ETHYLENE OXIDEPROPYLENE OXIDE COPOLYMER

作　　者：齐力[1] 宋永贤[1] 彭新生[1] 陈东霖 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《应用化学》1993年第6期66-70,共5页Chinese Journal of Applied Chemistry

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T_c增大,△H_m与△S_m呈线性降低。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.

关 键 词：环氧乙烷 环氧丙烷 共聚物 结晶 

分 类 号：O633.13[理学—高分子化学]