利用差示扫描热法(DSC)和偏光显微镜(POM)研究了乙烯-甲基丙烯酸离子键聚合物Surlyn对聚对苯二甲酸乙二醇酯(PET)/聚萘二甲酸乙二醇酯(PEN)共混物的结晶性能和力学性能的影响.研究结果表明,Surlyn对PET/PEN共混物具有化学成核作用.适量添加Surlyn,能促进PET/PEN共混物的成核结晶,明显提高结晶速度、结晶温度和结晶度,减小球晶尺寸,提高球晶均匀性,并有助于改善PET和PEN相容性,从而提高PET/PEN共混材料的拉伸强度、弯曲强度、弯曲模量和缺口冲击强度等力学性能.本研究体系Surlyn的最佳用量为2 phr.
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