成核聚丙烯的非等温结晶及熔融行为研究  

Study of Non-isothermal Crystallization and Melting Characteristics of Nucleated Polypropylene

作　　者：李谷[1] 刘文志 卢江[1] 

机构地区：[1]中山大学化学与化学工程学院,广东广州510275 [2]从化市聚赛龙工程塑料有限公司,广东广州510954

出　　处：《广州化工》2011年第7期54-55,72,共3页GuangZhou Chemical Industry

基　　金：广东省重大科技专项项目(2009A080208003)

摘　　要：运用DSC手段研究了高耐热性成核PP的非等温结晶行为和熔融转变行为,用Jeziorny法对DSC数据进行处理,同时分析了成核PP熔融转变特性。研究表明:采用NA-11的成核PP的非等温结晶速率Zc比PP明显提高,n值较小。添加Phosphiteester或NA-11成核剂后,PP的熔融峰对称性变差,峰温时熔化程度较高,其耐热性能、拉伸强度及弯曲强度较好,维卡软化点温度由纯PP的99.5℃,分别提高到104℃和107.4℃,对应的拉伸强度较纯PP均提高约10%,弯曲强度提高约27%。成核PP的耐热性提高,与其能在较高温度下成核结晶有关。The kinetics of non-isothermal crystallization behavior and melting process of high heat resistant nucleated PP were studied by means of differential scanning calorimetry（DSC）.Jeziorny theories and a new self-written program were used to analysis the DSC results and the melting process of nucleated PP.The results showed that PP with the nucleating agent NA-11 exhibit higher crystallizing temperature and Zc data,faster crystallizing rate and more asymmetric DSC melting curve.The heat resistant temperature improved from 99.5 ℃ for purified PP to 108 ℃ for nucleated PP,and tensile strength and flexural strength enhanced 10% and 27%,respectively.

关 键 词：非等温结晶行为 熔融行为 耐热性 成核聚丙烯 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]