文献类型：期刊文献

中文题名：Ti-Mg复合催化剂合成聚对苯二甲酸1,3-丙二醇酯

英文题名：Synthesis of poly(tri-methylene terephthalate) catalyzed by Ti-Mg composite catalyst

作者：高庆龙[1];朱志庆[1];沈卫华[1];方云进[1]

机构：[1]华东理工大学化学工程联合国家重点实验室

年份：2019

卷号：48

期号：11

起止页码：2538

中文期刊名：应用化工

外文期刊名：Applied Chemical Industry

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金项目(21576083)

语种：中文

中文关键词：聚对苯二甲酸1,3-丙二醇酯;共沉淀法;钛系复合催化剂

外文关键词：poly(tri-methylene terephthalate);co-precipitation method;Ti-Mg composite catalyst

摘要：通过共沉淀法制备Ti-Mg复合催化剂,用于合成聚对苯二甲酸1,3-丙二醇酯(PTT)。考察了催化剂焙烧温度、催化剂用量及反应条件对合成PTT产品的影响。结果表明,经550℃焙烧的Ti-Mg复合催化剂具有良好的催化活性,在反应条件:催化剂用量为550 mg/L(基于对苯二甲酸的质量),酯化温度235℃,酯化时间180 min,缩聚反应温度260℃,缩聚时间140 min,磷酸三苯酯用量为150 mg/L(基于对苯二甲酸的质量)时,合成的PTT产品的特性粘度达到0.913 8 dL/g,b值为2.38,端羧基含量为17.24 mmol/kg。分别采用XRD和SEM表征催化剂,发现催化剂表面呈现光滑且规整的六角棒状结构。
Poly(tri-methylene terephthalate)(PTT) was synthesized through a direct esterification followed by a poly-condensation reaction under the catalysis of a self-made Ti-Mg composite catalyst prepared by a co-precipitation method.The effects of catalyst calcination temperature,catalyst dosage and reaction conditions on the final product quality were studied.The results showed that the Ti-Mg catalyst calcined at 550 ℃ had high activity in the process of synthesis.Under the conditions of the catalyst dosage(based on the mass of PTA) of 550 mg/L,the esterification temperature of 235 ℃,the esterification time of 180 min,and the poly-condensation reaction temperature of 260 ℃,the poly-condensation time of 140 min,and the tri-phenyl phosphate dosage(based on the mass of PTA) of 150 mg/L,the intrinsic viscosity,the terminal carboxyl group content and the b value were 0.913 8 dL/g,17.24 mmol/kg and 2.38,respectively.The results of XRD and SEM found that the Ti-Mg catalyst exhibited a smooth surface and a regular hexagonal rod-like structure.