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首页> 外文期刊>Journal of Applied Polymer Science >Morphology and properties of poly(ethylene terephthalate) and thermoplastic polyester elastomer blends modified in the melt by a diisocyanate chain extender and filled with a short glass fiber
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Morphology and properties of poly(ethylene terephthalate) and thermoplastic polyester elastomer blends modified in the melt by a diisocyanate chain extender and filled with a short glass fiber

机译：二异氰酸酯链增量剂在熔体中改性的聚（对苯二甲酸乙二醇酯）和热塑性聚酯弹性体共混物的形态和性质，用短玻璃纤维填充

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摘要

The structural features and rheological, mechanical, and relaxation properties of poly(ethylene terephthalate) (PET) blends with 7-50 wt % polyester thermoplastic polyester elastomer (TPEE), a block copolymer of poly(butylene terephthalate) and poly(tetramethylene oxide), chemically modified by a diisocyanate chain extender (CE) and reinforced with 30% glass fibers (GF) were studied. The composites were obtained by reactive extrusion with a twin-screw reactor-mixer with a unidirectional rotation of screws. The molecular-structural changes in the materials were judged against data provided by differential scanning calorimetry, scanning electron microscopy, relaxation spectrometry, and rheological analysis of the melts. Regardless of the TPEE concentration in the blends with GF-reinforced PET, the addition of CE resulted in the growth of the indices of the mechanical properties at straining, bending, and impact loading and an increase in the melt viscosity. In addition, an increase in the average length of short GFs in the composites and an intensification of interphase adhesion in the polyester binder-GF surface system were observed. The introduction of CE promoted a slowdown in PET crystallization in the composites and intensified the interphase adhesion in the binder-GF system at temperatures higher and lower than the PET glass-transition temperature. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45711.
机译：聚（乙二醇酯）（PET）（PET）共混物的结构特征和流变，机械和弛豫特性，具有7-50wt％聚酯热塑性聚酯弹性体（TPEE），聚（丁二醇酯）和聚（四甲基氧化物）的嵌段共聚物，通过二异氰酸酯链增量剂（CE）化学改性并用30％玻璃纤维（GF）加强。通过用双螺杆反应器 - 混合器的反应挤出获得复合材料，具有单向螺钉的单向旋转。判断材料中的分子结构变化与差示扫描量热法提供的数据，扫描电子显微镜，弛豫光谱法和熔体流变分析。无论与GF加强PET中共混物中的TPEE浓度如何，加入CE导致机械性能的索引在紧张，弯曲和冲击载荷上的生长和熔体粘度的增加。另外，观察到复合材料中短GFS的平均长度的增加和聚酯粘合剂-GF表面系统中的间差异的强化。 CE引入在复合材料中促进了PET结晶的放缓，并在高于PET玻璃化转变温度下加强了粘合剂-GF系统中的相互粘附。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45711。

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