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首页> 外文期刊>Journal of Applied Polymer Science >Key properties to understand the performance of polycarbonate reprocessed by injection molding
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Key properties to understand the performance of polycarbonate reprocessed by injection molding

机译：了解注塑成型后聚碳酸酯性能的关键特性

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The reprocessing of injection-molded polycarbonate was studied in an attempt to understand the physical background for the variation of its performance upon sequential molding cycles. The effect of reprocessing on different properties of the moldings and the regrind is presented and discussed. A quantitative analysis of the Fourier transform IR spectra indicates that phenol and carbon dioxide are released during the initial cycles, probably due to molecular scission near the chain ends. Most of the results obtained agree well with the findings reported elsewhere. Essentially, the molecular weight, the free volume, and the specific volume were found to be critical properties for understanding the global performance of the moldings. Both the free volume and the reciprocal of the molecular weight depend linearly on the number of reprocessing cycles. Based on these properties, it is possible to develop relatively simple relations to estimate the variation of the rheological, optical, and mechanical properties with the number of reprocessing operations. (C) 2000 John Wiley & Sons, Inc. [References: 19]
机译：对注塑聚碳酸酯的后处理进行了研究，以试图了解其物理性能，以了解其在连续模塑周期中性能的变化。介绍并讨论了再加工对模制品和再磨料不同性能的影响。傅立叶变换红外光谱的定量分析表明，苯酚和二氧化碳在初始循环中释放，这可能是由于链端附近的分子断裂所致。获得的大多数结果与其他地方报告的结果非常吻合。实质上，发现分子量，自由体积和比体积是理解模制品整体性能的关键性能。自由体积和分子量的倒数均线性地取决于后处理循环的数目。基于这些性质，可以开发相对简单的关系，以估计流变，光学和机械性质随后处理操作次数的变化。 （C）2000 John Wiley＆Sons，Inc. [参考：19]

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