Effect of final heating temperature on crystallization of isotactic polypropylene nucleated with an aryl amide derivative as β-form nucleating agent

An aryl dicarboxylic acid amide compound TMB-5 is an efficient β -form nucleating agent for isotactic polypropylene ( i PP). Because of the solubility of TMB-5, superstructure and morphology of i PP crystals changed with melting conditions. Effects of final heating temperature ( T f ) on heterogeneo...

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Bibliographic Details
Published in:Chinese journal of polymer science 2011-05, Vol.29 (3), p.308-317
Main Authors: Dong, Mu, Jia, Ming-yin, Guo, Zhao-xia, Yu, Jian
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Industrial Chemistry/Chemical Engineering
Polymer Sciences
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Summary:An aryl dicarboxylic acid amide compound TMB-5 is an efficient β -form nucleating agent for isotactic polypropylene ( i PP). Because of the solubility of TMB-5, superstructure and morphology of i PP crystals changed with melting conditions. Effects of final heating temperature ( T f ) on heterogeneous nucleation of i PP/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 i PP 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 i PP crystals.
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-011-1031-0