SUPERIOR TENSILE EXTENSIBILITY OF PETG/PC AMORPHOUS BLENDS INDUCED VIA UNIAXIAL STRETCHING  

作　　者：傅强 

机构地区：[1]Department of Polymer Science & Materials,Sichuan University,State Key Laboratory of Polymer Materials Engineering

出　　处：《Chinese Journal of Polymer Science》2011年第1期125-132,共8页高分子科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.50533050,20874064 and 50873063)

摘　　要：A simultaneous increase of both stiffness and extensibility ofpoly（ethylene glycol-co-cyclohexane-1,4-dimethanol terephthalate） （PETG）/polycarbonate （PC） blends prepared through the slit die extrusion-uniaxial cold stretching process was observed. The stretched sheets have a unique mechanical character that an increased tensile modulus is accompanied by an increased extensibility with increasing the draw ratio. Especially, a sharp increasing of the extensibility is observed for PETG/PC （70/30 wt%） blends at draw ratios between 8.2 and 20.0, where a nine times increase of extensibility is achieved. The mechanism of stretching-induced superior extensibility is investigated via micrograph observation, rheometry and calorimetric analysis. The observed superior extensibility could be tentatively explained by the bridging effect of the PC microfibrils on the crack development during tensile failure.A simultaneous increase of both stiffness and extensibility ofpoly（ethylene glycol-co-cyclohexane-1,4-dimethanol terephthalate） （PETG）/polycarbonate （PC） blends prepared through the slit die extrusion-uniaxial cold stretching process was observed. The stretched sheets have a unique mechanical character that an increased tensile modulus is accompanied by an increased extensibility with increasing the draw ratio. Especially, a sharp increasing of the extensibility is observed for PETG/PC （70/30 wt%） blends at draw ratios between 8.2 and 20.0, where a nine times increase of extensibility is achieved. The mechanism of stretching-induced superior extensibility is investigated via micrograph observation, rheometry and calorimetric analysis. The observed superior extensibility could be tentatively explained by the bridging effect of the PC microfibrils on the crack development during tensile failure.

关 键 词：In situ fibrillation Amorphous blends EXTENSIBILITY Uniaxial stretching 

分 类 号：TB332[一般工业技术—材料科学与工程]