摘要
以异山梨醇(IS)和碳酸二苯酯(DPC)为主要原料,利用熔融酯交换法合成了异山梨醇型聚碳酸酯(PIC)。考察了原料摩尔比、缩聚温度、预聚温度、预聚压力、催化剂种类及用量对PIC特性黏度的影响,并对其外观、结构、热性能和分子质量进行了测试。较优的合成工艺条件为:乙酰丙酮锂为催化剂,用量为13.5×10-4mol/(mol IS),DPC和IS的摩尔比为1∶1,缩聚温度为210℃,预聚温度为110℃,预聚压力为0.04 MPa。在该条件下所得PIC的特性黏度为46.72 m L/g,数均分子质量为1.98×104,色差为3.89,玻璃化转变温度(Tg)为144℃。
Polyisosorbide carbonate（ PIC） is synthesized by melt transesterification using isosorbide（ IS） and diphenyl carbonate（ DPC） as raw materials. The effects of molar ratio of raw materials,polycondensation temperature,prepolymerization temperature,prepolymerization pressure and types and dosage of catalyst on the intrinsic viscosity of PIC are investigated. The appearance,structure,thermal properties and molecular weight of PIC are also detected. The optimum synthesis conditions for PIC are obtained as follows： lithium acetylacetonate is used as catalyst and its dosage is13. 5×10-4mol·（ mol IS）-1,molar ratio between DPC and IS is 1 ∶ 1,polycondensation temperature is at 210℃,prepolymerization temperature is at 110℃ and prepolymerization pressure is 0. 04 MPa. The intrinsic viscosity,the number average molecular weight,the color difference and Tgof PIC synthesized under the optimum conditions are 46. 72 m L·g^-1,1. 98×104,3. 89 and 144 ℃ respectively.
作者
沈陶
周同心
王涛
魏永梅
田恒水
SHEN Tao ZHOU Tong-xin WANG Tao WEI Yong-mei TIAN Heng-shui(School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, Chin)
出处
《现代化工》
CAS
CSCD
北大核心
2017年第8期158-161,共4页
Modern Chemical Industry
关键词
异山梨醇型聚碳酸酯
熔融酯交换
乙酰丙酮锂
合成
polyisosorbide carbonate
melt transesterification
lithium acetylacetonate
synthesis
