聚萘二甲酸乙二醇酯工业丝的制备及性能研究

采用酯交换法合成聚萘二甲酸乙二醇酯（PEN），通过聚合纺丝、捻线、织布、浸胶制备浸胶帘布．并对其性能进行研究。结果表明：PEN T业丝是一种高强高模低缩纤维，其模量是聚对苯二甲酸乙二醇酯（PET）的2倍，收缩率是PET的1/2；PEN的热稳定性、尺寸稳定性和化学稳定性好，玻璃化温度比PET高40-50℃，比水的沸点高15-20℃。;ln this study， the polyethylene naphthalate （PEN） was synthesized by transesterification. Then the dipped tire cord fabric was prepared through spinning， twisting，knitting and dipping，and its property was investigated. The results showed that， PEN industrial filament fiber possessed high strength， high modulus and low shrinkage. The modulus was twice as that of PET， and the shrinkage ratio was only half of that of PET. PEN had good thermal stability， dimensional stability and chemical stability. The glass transition temperature of PEN was around 115一120 ℃ ， which was 45～50℃ higher than that of PET