The feasibility of in-situ microfibrillar method on recycling poly(ethylene terephthalate)(PET) and high-density polyethylene(HDPE) mixtures was carried out by four repetitive extrusion.
研究了原位微纤化方法在回收聚对苯二甲酸乙二醇酯（PET）和高密度聚乙烯（HDPE）混合物方面的应用。
The synthesis and the crystallization of poly (ethylene terephthalate) (PET) with the novel coordination complex catalysts were investigated.
采用新型络合催化剂，对聚对苯二甲酸乙二酯(PET)的合成和结晶行为进行了研究。
The changes of intrinsic viscosity and end carboxyl group content with temperature and time were studied for poly(trimethylene terephthalate)(PTT), PET and CDP.
研究了聚对苯二甲酸丙二醇酯（ PTT） ， PET ，C DP在不同温度和时间下的特性粘数和端羧基含量的变化。
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