摘要
采用正交实验研究了以碳酸二苯酯(DPC)和双酚A(BPA)为原料、熔融酯交换法制备聚碳酸酯(PC)预聚体的合成工艺;考察了原料配比、出料温度、反应时间、催化剂种类及其用量等因素对PC预聚体的相对分子质量和透光率的影响。实验结果表明,以乙酸锂为催化剂,在原料配比n(DPC)∶n(BPA)=1.04∶1、出料温度270℃、反应时间105 min、催化剂用量0.100%(基于BPA的质量)的条件下,合成的PC预聚体的黏均相对分子质量最大。催化剂用量越大,PC预聚体的黏均相对分子质量越大;而催化剂用量越少,PC预聚体的透光率越高。
Polycarbonate (PC) precursors were synthesized from diphenyl carbonate (DPC) and bisphenol A (BPA) by melt transesterification. The effects of n (DPC) : n (BPA), discharging temperature, reaction time, catalyst type and catalyst dosage on the viscosity-average relative molecular mass and the light transmittance of the synthesized PC precursors were investigated by using orthogonal experimental design. The results showed that the viscosity-average relative molecular mass of PC precursors was the highest under the conditions of n (DPC) :n (BPA) 1.04: 1, discharge temperature 270℃, reaction time 105 min and LiAc as the catalyst with dosage of 0.100% (based on BPA mass). With increase of the catalyst dosage, the viscosity-average relative molecular mass of PC precursors increased but the light transmittance decreased.
出处
《石油化工》
CAS
CSCD
北大核心
2012年第1期76-81,共6页
Petrochemical Technology
关键词
碳酸二苯酯
双酚A
熔融酯交换
聚碳酸酯预聚体
diphenyl carbonate
bisphenol A
melt transesterification
polycarbonate precursor