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Reactive blending of modified polypropylene and polyamide 12: Effects of compatibilizer content on crystallization and blend morphology

机译:改性聚丙烯和聚酰胺12的反应共混:相容剂含量对结晶和共混物形态的影响

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摘要

The crystallization behavior and morphology of nonreactive and reactive melt-mixed blends of polypropylene (PP) and polyamide (PA12; as the dispersed phase) were investigated. It Was found that the crystallization behavior and the size of the PA12 particles were dependent on the content of the compatibilizer (maleic anhydride-modified polypropylene) because an in situ reaction occurred between the maleic anhydride groups of the compatibilizer and the amide end groups of PA12. When the amount of compatibilizer was more than 4%, the PA12 did not crystallize at temperatures typical for bulk crystallization. These finely dispersed PA12 particles crystallized co-incidently with the 1313 phase. The changes in domain size with compatibilizer content were consistent with Wu's theory. These investigations showed that crystallization of the dispersed phase Could not be explained solely by the size of the dispersion. The interfacial tension between the polymeric components in the blends may yield information on the fractionation of crystallization. (c) 2006 Wiley Periodicais, Inc.
机译:研究了聚丙烯(PP)和聚酰胺(PA12;作为分散相)的非反应性和反应性熔融混合共混物的结晶行为和形态。已经发现,PA12颗粒的结晶行为和尺寸取决于相容剂(马来酸酐改性的聚丙烯)的含量,因为相容剂的马来酸酐基团和PA12的酰胺端基之间发生了原位反应。 。当相容剂的量大于4%时,PA12在通常用于本体结晶的温度下不结晶。这些细分散的PA12颗粒与1313相同时结晶。随增容剂含量而变化的畴尺寸与吴的理论是一致的。这些研究表明,不能仅通过分散体的大小来解释分散相的结晶。共混物中聚合物组分之间的界面张力可产生有关结晶分级的信息。 (c)2006年Wiley Periodicais,Inc.

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