Citation: Mu Dong, Ming-yin Jia, Zhao-xia Guo, Jian Yu. EFFECT OF FINAL HEATING TEMPERATURE ON CRYSTALLIZATION OF ISOTACTIC POLYPROPYLENE NUCLEATED WITH AN ARYL AMIDE DERIVATIVE AS b-FORM NUCLEATING AGENT[J]. Chinese Journal of Polymer Science, ;2011, 29(3): 308-317. doi: 10.1007/s10118-011-1031-0 shu

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

Received Date: 18 March 2010
Revised Date: 7 July 2010

An aryl dicarboxylic acid amide compound TMB-5 is an efficient b-form nucleating agent for isotactic polypropylene (emPP). Because of the solubility of TMB-5, superstructure and morphology of emPP crystals changed with melting conditions. Effects of final heating temperature (Tf) on heterogeneous nucleation of emPP/TMB-5 were investigated. It was discovered that the crystallization temperature increased with decreasing Tf value. The optical microscopic images indicated that when TMB-5 partially dissolved in emPP 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 emPP crystals.
- Isotactic polypropylene,
- Heterogeneous nucleation,
- Crystallization,
- Polymer processing,
- Melting temperature
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