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首页> 外文期刊>Journal of Applied Polymer Science >NONISOTHERMAL CRYSTALLIZATION OF POLY(ETHYLENE TEREPHTHALATE) AND ITS BLENDS IN THE INJECTION-MOLDING PROCESS
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NONISOTHERMAL CRYSTALLIZATION OF POLY(ETHYLENE TEREPHTHALATE) AND ITS BLENDS IN THE INJECTION-MOLDING PROCESS

机译：注射成型过程中聚乙烯对苯二甲酸的共结晶结晶及其共混物

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We investigated the nonisothermal crystallization during the cooling process of injection molding of poly(ethylene terephthalate) (PET), PET/talc, and PET/Surlyn blends. We applied the isothermal crystallization parameters obtained by the Hoffman-Lauritzen theory to the kinetics of nonisothermal crystallization and then calculated the relative crystallinity chi/chi(c) as a function of the mold temperature. chi/chi(c) were nicely interpreted by calculation without effect of the pressure history on crystallization in PET and PET/talc (1 wt %) blends. In contrast, in the PET/Surlyn (3 wt %) blend, crystallization occurred at a lower mold temperature than predicted by our calculation. The transmission electron micrograph near the surface of the injection-molded PET/Surlyn blend showed deformation and stretching of dispersed Surlyn particles, suggesting that orientation of the PET matrix proceeds with the flow in processing. The orientation of the PET matrix resulted in acceleration of the crystallization in the injection molding. (C) 1995 John Wiley & Sons, Inc. [References: 21]
机译：我们研究了聚对苯二甲酸乙二醇酯（PET），PET /滑石粉和PET / Surlyn共混物注塑成型冷却过程中的非等温结晶。我们将通过Hoffman-Lauritzen理论获得的等温结晶参数应用于非等温结晶动力学，然后计算相对结晶度chi / chi（c）作为模具温度的函数。通过计算可以很好地解释chi / chi（c），而不受压力历史记录对PET和PET /滑石粉（1 wt％）共混物中结晶的影响。相反，在PET / Surlyn（3 wt％）共混物中，结晶发生在比我们的计算所预测的更低的模具温度下。注塑PET / Surlyn共混物表面附近的透射电子显微照片显示分散的Surlyn颗粒发生变形和拉伸，表明PET基体的取向随加工过程的进行而进行。 PET基质的取向导致在注射成型中结晶的加速。 （C）1995 John Wiley＆Sons，Inc. [参考：21]

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