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首页> 外文期刊>Journal of Applied Polymer Science >A STUDY ON BLENDS OF LIQUID CRYSTALLINE COPOLYESTERS WITH POLYCARBONATE .2. TRANSESTERIFICATION CONTROL
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A STUDY ON BLENDS OF LIQUID CRYSTALLINE COPOLYESTERS WITH POLYCARBONATE .2. TRANSESTERIFICATION CONTROL

机译：聚碳酸酯与碳酸共聚物共混物的研究.2。酯交换控制

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摘要

The inhibited and catalyzed ester exchange (transesterification) during melt blending of poly(bisphenol-A carbonate) (PC) and liquid crystalline poly(oxybenzoate-co-ethylene terephthalate) (POB-PET 40/60; P46) was investigated with differential scanning calorimetry. It was found that the ester exchange between P46 and PC was effectively inhibited for a 20% P46 blend at 240 degrees C, as further confirmed by nuclear magnetic spectroscopy. When the blending temperature and P46 concentration increased, only the transesterification between the PET segment in P46 and PC took place under inhibition. The morphology of the blends was analyzed with scanning electron microscopy and displayed a disconnected interface between P46 and PC under inhibition. Conversely, the transesterification took place between the POB segment in P46 and PC when a catalyst was added. (C) 1996 John Wiley & Sons, Inc. [References: 7]
机译：用差示扫描技术研究了聚（双酚A碳酸酯）（PC）与液晶聚（氧苯甲酸酯-共-对苯二甲酸乙二醇酯）（POB-PET 40/60; P46）熔融共混期间的受抑制和催化的酯交换（酯交换）。量热法。已经发现，在240℃下，对于20％的P46共混物，P46和PC之间的酯交换被有效地抑制，如通过核磁谱进一步证实的。当共混温度和P46浓度增加时，只有P46中的PET链段和PC之间发生酯交换反应。用扫描电子显微镜分析共混物的形态，并显示在抑制下P46和PC之间的界面断开。相反，当添加催化剂时，酯交换发生在P46中的POB段和PC之间。 （C）1996 John Wiley＆Sons，Inc. [参考：7]

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