Stannous oxalate as a novel catalyst for the synthesis of polytrimethylene terephthalate  

作　　者：Yu Rong Ren Shu Yong Jia Shou Cai Zhang Chun Ling Liu Yun Cheng Cui 

机构地区：[1]Department of Chemistry, Jilin Normal University, Siping 136000, China

出　　处：《Chinese Chemical Letters》2007年第7期872-874,共3页中国化学快报（英文版）

摘　　要：Stannous oxalate was prepared efficiently and characterized by XRD and FT-IR. It exhibited higher catalytic activity and had profitable effect than tetrabutyl titanate and stannous octoate for the synthesis of polytrimethylene terephthalate （PTT） via esterification-route. Over this catalyst, the degree of esterification of pure terephthalic acid was up to 94.4% at 260 ℃ after 1.5 h,while the intrinsic viscosity and content of terminal carboxyl groups of the corresponding PTT polyester, polymerized at 260 ℃,60 Pa for 2 h, was 0.8950 dL/g and 15 mol/t, respectively. Stannous oxalate was a promising catalyst for the synthesis of PTT polyester.Stannous oxalate was prepared efficiently and characterized by XRD and FT-IR. It exhibited higher catalytic activity and had profitable effect than tetrabutyl titanate and stannous octoate for the synthesis of polytrimethylene terephthalate （PTT） via esterification-route. Over this catalyst, the degree of esterification of pure terephthalic acid was up to 94.4% at 260 ℃ after 1.5 h,while the intrinsic viscosity and content of terminal carboxyl groups of the corresponding PTT polyester, polymerized at 260 ℃,60 Pa for 2 h, was 0.8950 dL/g and 15 mol/t, respectively. Stannous oxalate was a promising catalyst for the synthesis of PTT polyester.

关 键 词：Polytrimethylene terephthalate POLYESTER Stannous oxalate Esterification-route Intrinsic viscosity 

分 类 号：O632.52[理学—高分子化学]