固相缩聚法合成双酚A型聚碳酸酯的催化剂筛选  

Catalyst Screening for Synthesis of Bisphenol A Polycarbonate by Solid Phase Polycondensation

作　　者：赵文焕[1] 王涛[1] 魏永梅[1] 田恒水[1] Zhao Wenhuan;Wang Tao;Wei Yongmei;Tian Hengshui(School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)

机构地区：[1]华东理工大学化工学院,上海200237

出　　处：《工程塑料应用》2017年第5期131-135,共5页Engineering Plastics Application

摘　　要：采用固相缩聚(SSP)法,以双酚A(BPA)和碳酸二苯酯(DPC)为原料,在不同催化剂的作用下,反应得到双酚A型聚碳酸酯(BAPC)。测定了产物的特性黏数和色差,并对产物进行了傅立叶变换红外光谱(FTIR)、核磁共振氢谱(1H–NMR)和热重(TG)分析。结果表明,四苯硼钠(Na TPB)为较优的催化剂,在1 mol的BPA中加入催化剂Na TPB用量为1×10–4 mol时,通过非光气熔融酯交换法合成并经部分结晶处理、筛分得到180~250μm预聚物颗粒,其在210℃、近真空(压力<100 Pa)条件下,采用SSP法,反应3 h,可得色差较小(0.52%)、特性黏数为90.36 m L/g、热稳定性良好的BAPC。Bisphenol A polycarbonate(BAPC)was obtained with bisphenol A(BPA)and diphenyl carbonate(DPC)as raw materials under different catalyst by solid phase polycondensation(SSP).The intrinsic viscosities and color differences of the products were tested,and the products were analyzed by Fourier transform infrared spectroscopy(FTIR),1H nuclear magnetic resonance(1H-NMR)and thermogravimetric(TG)analysis.The results show that sodium tetraphenylborate(NaTPB)is the better catalyst.Prepolymer of low molecular weight is obtained through non-phosgene melting transesterification when the amount of catalyst NaTPB is1×10-4mol in1mol of BPA.After fraction crystallization and screening,180-250μm prepolymer particles are used as the reactant of SSP method.Then BAPC is got with intrinsic viscosity of90.36mL/g,small color difference(0.52%)and good thermal stability by SSP for3h at210℃under near vaccum(pressure<100Pa).

关 键 词：双酚A型聚碳酸酯 固相缩聚 四苯硼钠 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]