EFFECT OF FINAL HEATING TEMPERATURE ON CRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE NUCLEATED WITH AN ARYL AMIDE DERIVATIVE AS β-FORM NUCLEATING AGENT附视频

被引：0
|
作者：
于建
机构：
[1] InstituteofPolymerScienceandEngineering,DepartmentofChemicalEngineering,SchoolofMaterialsScienceandEngineering,TsinghuaUniversity
来源：
Chinese Journal of Polymer Science | 2011年 / 03期
关键词：
Isotactic polypropylene; Heterogeneous nucleation; Crystallization; Polymer processing; Melting temperature;
D O I：
暂无
中图分类号：
TQ320.1 [基础理论];
学科分类号：
摘要：
<正>An aryl dicarboxylic acid amide compound TMB-5 is an efficientβ-form nucleating agent for isotactic polypropylene（iPP）.Because of the solubility of TMB-5,superstructure and morphology of iPP crystals changed with melting conditions.Effects of final heating temperature（T_f）on heterogeneous nucleation of iPP/TMB-5 were investigated.It was discovered that the crystallization temperature increased with decreasing T_f value.The optical microscopic images indicated that when TMB-5 partially dissolved in iPP melt,the remaining（non-dissolved）TMB-5 facilitated the recrystallization of dissolved nucleating agent from the melt,which promoted crystallization.Complete solubility of nucleating agent caused the decreasing efficiency.TMB-5 recrystallized in the form of tiny needles,whose aggregates induced dendritic iPP crystals.
引用
收藏
页码：308 / 317
页数：10
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