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首页> 外文期刊>Journal of Applied Polymer Science >Quiescent crystallization kinetics and morphology of isotactic polypropylene resins for injection molding. I. Isothermal crystallization
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Quiescent crystallization kinetics and morphology of isotactic polypropylene resins for injection molding. I. Isothermal crystallization

机译：等规聚丙烯树脂的静态结晶动力学和形态。一，等温结晶

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摘要

The quiescent isothermal crystallization kinetics of polypropylene was studied as a function of molecular weight (M-w), amount of ethene, and amount of maleic anhydride and acrylic acid grafting. Differential scanning calorimetry and polarized light optical microscopy were used to follow this kinetics. It was observed that the linear growth rate, G, decreased with the increase of M-w, but increased with the amount of ethene. In the grafted polymers, as the amount of grafting increased, G decreased. The fold surface free energy, sigma(e), was found to increase with the increase in M-w. The heterophasic and grafted polymers had sigma(e) values higher than the homopolymers. All samples showed spherulitic morphology, except the acrylic acid-grafted polypropylene that showed axialitic morphology. (C) 1998 John Wiley & Sons, Inc. [References: 23]
机译：研究了聚丙烯的静态等温结晶动力学，该动力学是分子量（M-w），乙烯量以及马来酸酐和丙烯酸接枝量的函数。差示扫描量热法和偏光光学显微镜用来追踪这一动力学。观察到线性增长率G随M-w的增加而降低，但随乙烯量的增加而增加。在接枝聚合物中，随着接枝量的增加，G降低。发现折叠表面自由能sigma（e）随着M-w的增加而增加。多相和接枝聚合物的sigma（e）值高于均聚物。除丙烯酸接枝的聚丙烯显示出轴性形态外，所有样品均显示出球状形态。 （C）1998 John Wiley＆Sons，Inc. [参考：23]

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