Effects of ordered structure on non-isothermal crystallization kinetics and subsequent melting behavior of β-nucleated isotactic polypropylene/graphene oxide composites

被引：20

作者：

Yu, Yansong ^{[1
]}

Zeng, Fangxinyu ^{[1
]}

Chen, Jinyao ^{[1
]}

Kang, Jian ^{[1
]}

Yang, Feng ^{[1
]}

Cao, Ya ^{[1
]}

Xiang, Ming ^{[1
]}

机构：

[1] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2019年 / 136卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Non-isothermal crystallization kinetics; Graphene oxide; Isotacticpolypropylene; beta-Nucleating agent; Ordered structure; MECHANICAL-PROPERTIES; POLYMORPHIC BEHAVIOR; SELF-NUCLEATION; GROWTH; SHEAR; ALPHA; MICROSTRUCTURE; NANOCOMPOSITES; CRYSTALS; STRENGTH;

D O I：

10.1007/s10973-018-7776-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this paper, effects of ordered structure on non-isothermal crystallization kinetics and subsequent melting behavior of beta-nucleated isotactic polypropylene/graphene oxide composites were investigated. Under all cooling rates, as fusion temperature T-f stepped into the range of 168-178 degrees C, the ordered structure survived in the melt, resulting in the increase in crystallization peak temperature T-p, the decrease in crystallization activation energy Delta E and the decrease in the half crystallization time t(1/2). When endset temperature of cooling T-end=50 degrees C, lower cooling rate encouraged the formation of more -phase. Moreover, the influence of ordered structure on beta-alpha recrystallization was studied by adjusting the T-end. When T-end = 105 degrees C, higher cooling rate encouraged the formation of more beta-phase. The ordered structure was favorable for the improvement of the thermal stability of the beta-phase during beta-alpha recrystallization.

引用

页码：1667 / 1678

页数：12

共 63 条

[1] Influence of Annealing on Microstructure and Mechanical Properties of Isotactic Polypropylene with β-Phase Nucleating Agent [J].