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 as1H-NMR,FTIR,GPC,DSC,and tensile testing.The results indicated that the weight average molecular weight of PES could reach 14.2 × 104 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
Key words
PES polyester/inorganic nanoparticles/non-isothermal/kinetics/Mo equation
维普
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