聚丙烯/乙烯-丙烯酸共混体系等温结晶行为研究  

Isothermal Crystallization Kinetics of Polypropylene/Ethylene-acrylic Acid Blends

作　　者：杨姗 杨红艳 李玉华 顾雪梅 YANG Shan;YANG Hong-yan;LI Yu-hua;GU Xue-mei(Guizhou Province Key Laboratory of Ecological Protection and Restoration of Typical Plateau Wetlands,Guizhou University of Engineering Science;The Coal Chemical Engineering 2011 Collaborative Innovation Center of Guizhou Province,Guizhou University of Engineering Science,Bijie,Guizhou551700,China)

机构地区：[1]贵州工程应用技术学院贵州省典型高原湿地保护与修复重点实验室 [2]贵州工程应用技术学院贵州省煤化工工程2011协同创新中心,贵州毕节551700

出　　处：《贵州工程应用技术学院学报》2023年第3期12-16,共5页Journal of Guizhou University Of Engineering Science

基　　金：贵州省普通高等学校青年科技人才成长项目“毕节市典型燃煤企业周边土壤中砷的环境风险评价及其预测-预警的研究”,项目编号:黔教合KY字[2020]159。

摘　　要：采用差示扫描量热法研究了熔融挤出制备的聚丙烯(PP)与乙烯-丙烯酸物(EAA)共混物与磷石膏(PhG)改性的PP/EAA共混体系在不同结晶温度(120℃、125℃和130℃)下的等温结晶行为。对比两种共混体系的结晶行为,PhG的加入可以有效缩短共混体系的结晶时间,从而提高共混体系的结晶速率,同时PhG加入后诱导共混体系生成了β晶型的晶体并提高了共混体系的熔融温度。由此可见,PhG在共混体系中起到了很好的异相成核作用。The isothermal crystallization behavior of polypropylene(PP),ethylene-acrylic acid(EAA)blends and phosphogypsum(PhG)modified PP/EAA blends prepared by melt extrusion at different crystallization temperatures(120℃,125℃ and 130℃)was studied by differential scanning calorimetry.With the isothermal crystallization temperature increasing,the crystallization rate and time of two blends decreased.The addition of PhG shortened the crystallization time and increased the crystallization rate of the blends.The Avrami equation was suitable for analyzing the isothermal crystallization behavior of the blend system.The addition of PhG shorted the time when the blend system reached the maximum crystallization rate and the half crystallization period,and increased the crystallization rate constant of the blend system.Adding PhG induced blend system producedβ-crystal and increased the melting temperature of the blend system.All these indicated that PhG played a good role in heterogeneous nucleation in the blend system.

关 键 词：共混体系 等温结晶 结晶速率 结晶时间 异相成核 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]