Abstract Aliphatic polycarbonate (PDCM) was synthesized from dimethyl carbonate and 1,4-cyclohexanedimethanol via melting polymerization in this study. The molecular weight of PDCM was determined by gel permeation chromatography (GPC) to be ca. 49,900. The crystallization behavior and crystallinity of polyethylene terephthalate (PET) were significantly modified by adding 0.3–5.0 wt% PDCM, which was confirmed by differential scanning calorimetry (DSC), photomicrography with a heating stage and SAXS analysis. In nonisothermal crystallization kinetics analysis, the reciprocal of half-time crystallization (i.e., G parameter) for the 1.0 wt% PDCM/PET blends is 3.5 times greater than that of pristine PET at a cooling rate of 10 °C/min. Observation via polarized optical microscopy showed that the spherulites size of PET was condensed by PDCM. In addition, the fold surface energy (σe) decreased with the presence of PDCM. According to the results of dynamic mechanical analysis (DMA) examination, the mechanical strength of 1.0 wt% PDCM/PET thin film was enhanced as the transparency still maintained above 85%, which illustrated the transparent thin film has better thermal stability and has high potential to be used such as in the electronic appliances.

中文翻译：

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脂肪族聚碳酸酯与聚对苯二甲酸乙二醇酯共混物中的成核作用

摘要 本研究以碳酸二甲酯和1,4-环己烷二甲醇为原料，通过熔融聚合合成了脂肪族聚碳酸酯(PDCM)。PDCM 的分子量通过凝胶渗透色谱法 (GPC) 测定为大约 49,900。通过添加 0.3-5.0 wt% PDCM，聚对苯二甲酸乙二醇酯 (PET) 的结晶行为和结晶度得到显着改变，这通过差示扫描量热法 (DSC)、带加热台的显微照相术和 SAXS 分析得到证实。在非等温结晶动力学分析中，在 10 °C/min 的冷却速率下，1.0 wt% PDCM/PET 混合物的半衰期结晶的倒数（即 G 参数）是原始 PET 的 3.5 倍。通过偏光显微镜观察表明，PET 的球晶尺寸是由 PDCM 凝聚的。此外，随着 PDCM 的存在，折叠表面能 (σe) 降低。根据动态力学分析（DMA）检测结果，1.0 wt% PDCM/PET薄膜的机械强度有所提高，透明度仍保持在85%以上，说明透明薄膜具有更好的热稳定性和潜力用于电子设备等。