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