Morphology and properties of PBT/nylon 6/EVA‐g‐MAH ternary blends prepared by reactive extrusion
Morphology and properties of PBT/nylon 6/EVA‐g‐MAH ternary blends prepared by reactive extrusion
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DOI：
10.1002/pen.10110
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发表时间：
2003-06
影响因子：
3.2
通讯作者：
Seon-Joon Kim;Dong-Keun Kim;W. Cho;C. Ha
中科院分区：
文献类型：
--
作者：
Seon-Joon Kim;Dong-Keun Kim;W. Cho;C. Ha
研究了聚对苯二甲酸丁二酯(PBT)/尼龙6 (PA6)/ EVA-g-MAH三元共混物的形态和性能。在旋转啮合双螺杆挤出机中制备了共混物。在PBT/PA6二元共混物中加入接枝的马来酸酐（MAH）后，拉伸和弯曲强度降低，但冲击强度增加，而PBT/PA6共混物的力学性能随PA6含量的增加而降低，无论EVA-g-MAH是否存在。三元共混物的形貌研究显示出明显的相分离。三元共混物的流变性能表明，尽管EVA-g-MAH有望作为PBT/PA6共混物的相容剂，但PA6与接枝的MAH胺端基团之间的反应性过高会使PBT与PA6之间的相容性变差。通过研究共混顺序对三元共混物性能的影响，考察了PBT、PA6和EVA-g-MAH中官能团之间的反应性程度。
Morphology and properties of poly(butylene terephthalate) (PBT)/nylon 6 (PA6)/ EVA-g-MAH ternary blends were investigated. The blends were prepared in a corotating, intermeshing, twin-screw extruder. The incorporation of maleic anhyride (MAH) grafted onto ethylene-vinyl acetate copolymer (EVA) (EVA-g-MAH) in the PBT/PA6 binary blends decreased the tensile and flexural strength but increased the impact strength, while the mechanical properties of the PBT/PA6 blends were decreased with increasing PA6 content regardless of the presence or absence of the EVA-g-MAH. The morphology studies of the ternary blends showed gross phase separation. The rheological properties of the ternary blends suggested that excessively high reactivity between amine end groups of PA6 and MAH grafted onto EVA makes the compatibility between PBT and PA6 worse, although EVA-g-MAH was expected to work as a compatibilizer for PBT/PA6 blends. The degree of reactivity between functional groups in PBT, PA6, and EVA-g-MAH was also examined by investigating the effect of blending sequence on the properties of the ternary blends.