PBT 固相缩聚的影响因素分析

摘要

通过 PBT切片固相缩聚（SSP）实验，分析讨论了温度、时间、氮气流量和基础切片性能指标等因素对 PBT固相缩聚反应的影响。结果表明温度、氮气流速、端羧基值对于 PBT 固相缩聚有显著影响，并均有明显的拐点：温度为190℃，氮气流速为50 mL ／min，端羧基值为17．33 mol ／t。%To reveal the influence factors on solid state polymerization of PBT,we conducted a series of PBT SSP experiments.By these experiments,the effects on PBT SSP reaction,such as temperature,reaction time,Ni-trogen flow and the reaction chip′s physicochemical property,were all discussed in detail.It showed that the tem-perature,nitrogen flow rate and the amount of carboxyl end groups all had important influence on the PBT SSP, which had significant inflection point,that was temperature at 1 90 ℃,nitrogen flow rate at 50 mL /min and termi-nal carboxyl at 1 7.33 mol /t.