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Stannous oxalate as a novel catalyst for the synthesis of polytrimethylene terephthalate 被引量:3
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作者 Yu Rong Ren Shu Yong Jia Shou Cai Zhang Chun Ling Liu Yun Cheng Cui 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第7期872-874,共3页
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 polytri... 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. 展开更多
关键词 Polytrimethylene terephthalate POLYESTER stannous oxalate Esterification-route Intrinsic viscosity
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