摘要
本研究使用纤维级对苯二甲酸(PTA)和1,4-丁二醇(BD)为原料,采用直接酯化—缩聚法合成 PBT,所得树脂特性粘度0.76—0.85,羧基含量21.9—37.1eq/10~6g,熔点224—229℃。BD 副反应消耗11.8%—13.7%。讨论了酯化反应温度、原料配比等主要影响因素。提出了在酯化反应完全结束之前转入缩聚阶段可降低 BD 副反应消耗。
Using fiber-grade high-purity terephthalic acid(PTA)and fiber-grade 1,4-butanediol as raw materials,through direct esterification-polycondensation process,the synthesis of poly(1,4-butylene terephthalate)(PBT)was performed,The result-ing resin has intrinsic viscosity 0.76—0.85,carboxyl group content 21.9—37.1eq/10~6g,melting point 224—229℃,the Consumption of BD side reaction 11.8%—13.7%.In thispaper,the influences of the main factors such as reaction temperature and raw ma-terial ratio etc.on the reaction have been discussed.It is put forward that theconsumption of BD side reaction would be reduced if polycondensation had begunbefore esterification finished.
出处
《合成纤维工业》
CAS
CSCD
1990年第2期10-13,共4页
China Synthetic Fiber Industry
