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首页> 外文期刊>Polymers for advanced technologies >Reactive compatibilization of nylon copolymer/EPDM blends: experimental aspects and their comparison with theory
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Reactive compatibilization of nylon copolymer/EPDM blends: experimental aspects and their comparison with theory

机译：尼龙共聚物/ EPDM共混物的反应相容性：实验方面及其与理论的比较

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摘要

In situ reactive compatibilization was first time applied to a low melting nylon (nylon 6 and 66 copolymer) and EPDM blend system. The effects of in situ compatibilization and concentration of compatibilizer on the morphology and mechanical properties of nylon/EPDM blends have been investigated. The influence of EPM-g-MA on the phase morphology was examined by the scanning electron microscopy (SEM) after preferential extraction of the minor phase. The SEM micrographs were quantitatively analyzed for domain size measurements. The compatibilizer concentrations used were 0, 1, 2.5, 5, and 10wt%. The graft copolymer (nylon-g-EPM) formed at the interface showed relatively high emulsifying activity. A maximum phase size reduction was observed when 2.5 wt% of compatibilizer was added to the blend system. This was followed by a leveling-off at higher loadings indicating interfacial saturation. The conformation of the compatibilizer at the interface was deduced based on the area occupied by the compatibilizer at the blend interface. The experimental compatibilization results were compared with theoretical predictions of Noolandi and Hong. It was concluded that the molecular state of compatibilizer at interface changes with concentration. The in situ compatibilized blends showed considerable improvement in mechanical properties. Measurement of tensile properties shows increased elongation as well as enhanced modulus and strength up on compatibilization. At higher concentrations of compatibilizer, a leveling-off of the tensile properties was observed. A good correlation has been observed between the mechanical properties and morphological parameters. Copyright (c) 2007 John Wiley & Sons, Ltd.
机译：现场反应性增容首次应用于低熔点尼龙（尼龙6和66共聚物）和EPDM共混体系。研究了原位增容和增容剂浓度对尼龙/ EPDM共混物形态和力学性能的影响。优先提取次要相后，通过扫描电子显微镜（SEM）检查了EPM-g-MA对相形态的影响。 SEM显微照片被定量分析以用于域尺寸测量。使用的相容剂浓度为0、1、2.5、5和10wt％。在界面处形成的接枝共聚物（尼龙-g-EPM）表现出较高的乳化活性。当将2.5重量％的增容剂添加到共混体系中时，观察到最大的相尺寸减小。随后在较高的载荷下出现稳定现象，表明界面饱和。根据增容剂在共混物界面处所占的面积推导增容剂在界面处的构象。将实验相容性结果与Noolandi和Hong的理论预测进行了比较。结论是，界面上的增容剂分子状态随浓度而变化。原位相容的共混物显示出机械性能的显着改善。拉伸性能的测量显示出增加的伸长率以及增强的模量和强度，直至相容。在较高浓度的增容剂下，观察到拉伸性能的稳定。已经观察到机械性能和形态参数之间的良好相关性。版权所有（c）2007 John Wiley＆Sons，Ltd.

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