负载型β-成核剂对无规共聚聚丙烯等温结晶行为与熔融特性的影响  

The influence of supported β-nucleating agent on isothermal crystallization behavior and melting characteristics of polypropylene random copolymer

作　　者：李美 章自寿[2] 麦堪成[2] LI Mei;ZHANG Zishou;MAI Kancheng(Technology Development Center for Polymer Processing Engineering of Guangdong Colleges and Universities∥Advance Technology Development Center for Polymer Processing Engineering of Guangdong∥Guangdong Industry Technical College, Guangzhou 510300, China;Materials Science Institute, School of Chemistry, Sun Yat sen University∥ Key Laboratory of Polymeric Composites and Functional Materials of Ministry of Education ∥ Guangdong ProvincialKey Laboratory of High Performance Resin Based Composites, Guangzhou 510275, China)

机构地区：[1]广东轻工职业技术学院∥广东高校高分子材料加工工程技术开发中心∥广东省高分子材料先进加工工程技术研究中心,广东广州510300 [2]中山大学化学院材料科学研究所∥聚合物基复合材料及功能材料教育部重点实验室∥广东省高性能树脂基复合材料重点实验室,广东广州510275

出　　处：《中山大学学报（自然科学版）》2017年第6期111-115,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：2016年广东省高性能树脂基复合材料重点实验室开放课题;2017年度广东轻工职业技术学院人才类项目(KYRC2017-0013)

摘　　要：采用负载型β-成核剂制备了β-成核无规共聚聚丙烯(β-PPR),通过差示扫描量热法(DSC)对比研究了纯PPR和β-PPR等温结晶行为和熔融特性,采用Avrami方法描述了PPR和β-PPR等温结晶动力学,结果表明负载型β-成核剂加入明显提高PPR结晶速率,缩短结晶时间;且等温结晶行为受结晶温度影响小,主要形成β-晶,在低温等温结晶,有利于β-PPR形成。PPR were prepared with supportedβnucleating agent in this paper,the isothermal crystallization behavior and melting characteristics of PPR andβPPR were studied with Differential Scanning Calorimeter(DSC).The isothermal crystallization kinetics of PPR andβPPR were examined by Avrami model.It is indicated that the addition of supportedβnucleating agent improve the crystallization rate of PPR apparently and shorten the half crystallization time.Furthermore,the isothermal crystallization behavior ofβPPR depend little on the crystallization temperature and it mainly formedβcrystal.It is apt to formβcrystal for PPR when crystallization at low temperature.

关 键 词：无规共聚聚丙烯 β-成核剂 等温结晶动力学 

分 类 号：O6312[理学—高分子化学]