摘要
用ＤＳＣ方法对环氧乙烷环氧丙烷共聚物及其ＬｉＣｌＯ＿４体系的非等温结晶进行了测试，用Ｍａｎｄｌｋｅｒｎ，Ｚｉａｂｉｃｋｉ－Ｊｅｚｉｏｒｎｙ，Ｏｚａｗａ和一种修正方法对该体系进行了研究，结果表明，在同一冷却速率下，试样开始结晶温度顺序为（ＥＯ∶ＰＯ∶ＬｉＣｌＯ＿４摩尔比）９０∶１０∶∞＞７０∶３０∶∞＞７０∶３０∶２０，ＰＯ和盐含量的增加都能使结晶温度降低，Ａｖｒａｍｉ指数ｎ随冷却速率的增加先增加，当Ｒ＞１０时趋于恒定，为１．２８。用Ｍａｎｄｅｌｋｅｒｎ方法求得的结晶动力学参数Ｚｃ随冷却速率的增加先增加，当Ｒ＞１０Ｋ／ｍｉｎ时趋于恒定为１．２０。共聚物的Ｇｃ值不随冷却速率的变化而变化，随ＰＯ含量增加而增加，处理结果表明Ｍａｎｄｅｌｋｅｒｎ，Ｏｚａｗａ和修正方法都不适合本体系，而Ｚｉａｂｉｃｋｉ理论适合于本体系。
The kinetics of non-isothermal crystallization of ethylene oxide and propylene oxide copolymer and LiClO_4 complex has been investigated by differential scaning calorimetry.Basic on the Mandelken,Ziabicki and Ozawa theories,the kinetic crystallizability G_c,rate constant Z_c have been determined and discussed.Avrami exponent n is dependent on cooling rate(R=2.5,5K/min)and it Is independent on cooling rate( R= 10,20,40,80 K/min),but it is increased with increasing amorphous component PO.The values of G_c are constnat with cooling rate at EO/PO copolymer and decrease with cooling rate at LiClO_4 complex.The values of Z_c increase with cooling rate,and have no significant change when the cooling rate is more than 10 K/min,in sum.The results show disagreement with the Mandelkern and Ozawa theories.This system accord with Ziabicki theory.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1996年第1期47-53,共7页
Polymer Materials Science & Engineering
关键词
环氧乙烷
共聚物
动力学
结晶
电解质
聚醚
s:ethylene oxide,copolymer,non-isothermal crystallization, kinetics,crystallization
