【作者】 查刘生； 章安东；

【Author】 Zha Liusheng;Zhang Andong;College of Materials Science and Engineering,Donghua University;

【机构】 东华大学材料科学与工程学院；

【摘要】 以碳酸二乙酯(DEC)、戊二醇(PDO)和己二醇(HDO)为单体,采用酯交换聚合法并结合精馏工艺合成了聚碳酸酯二元醇(PCDL)共聚物。当PDO/HDO摩尔比接近1:1时,产物为透明的粘稠液体。产物中戊二醇碳酸酯单元和己二醇碳酸酯单元的摩尔比与合成配方中PDO/HDO摩尔比接近。随着常压精馏回流比的增加,馏分中DEC含量减少,产物分子量增大。用合成的PCDL共聚物制备的热塑性聚氨酯(TPU)弹性体的拉伸强度、撕裂强度和断裂伸长率等物理机械性能要明显优于用日本旭化成株式会社产的同类PCDL制备的TPU弹性体。更多还原

【Abstract】 Polycarbonate diol(PCDL) copolymer was synthesized by transesterification polymerization method and rectification process using diethyl carbonate(DEC),pentanediol(PDO) and hexanediol(HDO) as monomers.When the molar ratio of PDO to HDO approaches1:1,the product is a transparent viscous liquid.The molar ratio of pentanediol carbonate unit to hexanediol carbonate unit in the product is close to the one of PDO to HDO in the synthesis recipe.With the increase of the reflux ratio of atmospheric rectification,the DEC content in the fraction is decreased and the molecular weight of the product is elevated.The physical mechanical properties of the thermoplastic polyurethane(TPU) elastomer prepared using the synthesized PCDL copolymer,such as tensile strength,tearing strength and elongation at break,are superior to the ones based on the PCDL produced by Asahi Kasei Co.in Japan.更多还原