无机纳米粒子对PES性能的影响及其结晶动力学  

Effects of Inorganic Nanoparticles on Properties and Crystallization Kinetics of PES

作　　者：罗开举 朱峰 孙希萍 LUO Kaiju;ZHU Feng;SUN Xiping(Shanghai Pujing Chemical Industry Co.Ltd.,Shanghai 201512,China)

机构地区：[1]上海浦景化工技术股份有限公司,上海201512

出　　处：《塑料》2024年第6期76-81,105,共7页Plastics

基　　金：上海浦景化工技术股份有限公司内部项目(PJ-RD-2022-1125-12-XS)。

摘　　要：以丁二酸和乙二醇为原料,采用高温熔融聚合法制备了高特性黏度的聚丁二酸乙二醇酯(PES)。通过1H-NMR、FTIR、GPC、DSC、拉伸测试等方法对其结构和性能进行了详细表征。结果表明,PES的重均分子量可达14.2×10~4 Da,分布为1.61,特性黏度为1.13 dL/g,赋予其较好的拉伸强度(23.8 MPa)和断裂伸长率(620%)。制备的PES熔点为101.5℃、玻璃化温度为-11.6℃、结晶度为36.2%。探究了不同质量比的纳米碳酸钙和纳米滑石粉对PES各项性能的影响,进一步对0.10%纳米碳酸钙及0.15%纳米滑石粉改性PES的结晶动力学进行了研究。采用莫志深方程(Mo方程)对该过程进行了拟合表征,试验结果能够较好地描述纳米粒子改性PES的非等温冷结晶过程,但是,对纯PES的拟合效果较差。Polyethylene glycol succinate(PES)with high characteristic viscosity was prepared by high-temperature melt polymerization with succinic acid and ethylene glycol as raw materials.The structure and properties were characterized in details through testing methods such as~1H-NMR,FTIR,GPC,DSC,and tensile testing.The results indicated that the weight average molecular weight of PES could reach 14.2×10~4 Da,with a distribution of 1.61.The intrinsic viscosity reached as high as 1.13 dL/g,endowing the film with a satisfactory tensile strength of 23.8 MPa and elongation at break of 620%.The obtained PES had a melting point at 101.5℃,a glass transition temperature at-11.6℃,and a crystallinity of 36.2%.The effects of nanometer calcium carbonate and talc on the properties of PES were investigated,and the crystallization kinetics of PES modified by 0.10%nanometer calcium carbonate and 0.15%nanometer talc were further studied.The process was characterized by Mo equation,and the experimental results could describe the non-isothermal crystallization process of modified PES well,while expect for the pure PES.

关 键 词：PES聚酯 无机纳米粒子 非等温结晶 动力学 Mo方程 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]