Enhanced β-crystallization in polypropylene random copolymer with a supported β-nucleating agent

被引：18
作者：
Li, Mei [1 ,2 ]
Li, Gu [2 ]
Zhang, Zishou [1 ,2 ]
Dai, Xin [1 ,2 ]
Mai, Kancheng [1 ,2 ]
机构：
[1] Sun Yat Sen Univ, Sch Chem & Chem Engn, Inst Mat Sci, Guangzhou 510275, Guangdong, Peoples R China
[2] Guangdong Prov Key Lab High Performance Resin Bas, Key Lab Polymer Composites & Funct Mat, Minist Educ, Guangzhou 510275, Guangdong, Peoples R China
来源：
THERMOCHIMICA ACTA | 2014年 / 598卷
关键词：
Polypropylene random copolymer; beta-Nucleating agent; Non-isothermal crystallization kinetics; Melting characteristics; Crystallization activation energy; Crystallization morphology; ISOTACTIC POLYPROPYLENE; MECHANICAL-PROPERTIES; THERMAL-DEGRADATION; PHASE-CHANGE; KINETICS; TOUGHNESS; BEHAVIOR; ALPHA; NANOPARTICLES; PARAMETERS;
D O I：
10.1016/j.tca.2014.11.004
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A great number of investigations demonstrated that it is more difficult for polypropylene random copolymer (PPR) to obtain high beta-crystal content. To increase the beta-crystallization in PPR, calcium pimelate (CaPA) supported on the surface of nano-CaCO3 (CC100) was used as a beta-nucleating agent. The crystallization behavior and morphology, melting characteristics and non-isothermal crystallization kinetics of CC100 nucleated PPR were compared with PPR nucleated by aryl amide compounds (TMB-5) and CaPA by DSC, XRD and POM. The non-isothermal crystallization kinetics of PPR and beta-nucleated PPR was examined by Jeziorny and Mo models. The crystallization activation energy and nucleation activity (NE) of PPR and beta-nucleated PPR were calculated according to Friedman and Dobreva methods, respectively. It indicated that the beta-nucleating efficiency of CC100 was higher than those of TMB-5 and CaPA. It is an effective method to enhance the beta-crystallization of PPR with a supported beta-nucleating agent. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：36 / 44
页数：9
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