【摘要】 通过DSC、偏光显微镜、TG以及热变形测试等分析方法 ,研究了聚对苯二甲酸乙二醇酯 (PET) /聚对萘二甲酸乙二醇酯 (PEN)共混物的结晶特征以及热稳定性能。结果表明 :PEN的结晶温度高 ,结晶历程长 ,快速降温会导致PEN结晶困难或不结晶。PET/PEN共混物结晶性能与PEN含量密切相关 ,含量低能结晶 ,含量达 3a %时基本不结晶。PET/PEN共混物的热分解温度比PEN提高了 4℃ ,总残留率比PET提高了 5 .5 7% ,其中空吹塑容器的热收缩率随PEN含量的增加而降低 ,表明PET/PEN共混材料的热稳定性能好于纯PET。更多还原

【Abstract】 The crystalline characteristic and heat stability of PET/PEN blends were studied through DSC,polarization microscope,TG and thermal deformation test.Results showed that crystalline temperature of PEN is high and its crystalline course is long.Meanwhile quick drop in temperature make it crystallize with difficulty or be incapable of crystallization.Crystalline properties of PET/PEN blends are dependent closely on PEN contents. PET/PEN blends can crystallize with low contents of PEN, but can’t crystallize with 3a % of PEN.Decomposition temperature of PET/PEN blends is 4 ℃ higher than that of PEN;its residual rate is 5.57 % higher than that of PET.Thermal shrinkage of PET/PEN container decreased with increasing contents of PEN,which showed that the heat stability of PET/PEN blends was better than that of PET.更多还原