采用丙烯腈-丁二烯-苯乙烯（ABS）核壳结构改性剂增韧聚对苯二甲酸丁二醇酯（PBT）/聚碳酸酯（PC）共混物。动态力学测试（DMTA）结果表明,PBT与PC为热力学不相容体系,ABS的引入导致PBT、PC玻璃化转变温度相互靠近,相容性提高;差示扫描量热（DSC）研究结果表明,随着ABS的加入,PBT/PC体系中PBT的结晶温度、熔融温度向低温方向移动,不利于PBT的结晶;扫描电镜（SEM）显示,ABS在PBT/PC基体中均匀分散,ABS的引入使PC在PBT中的相区尺寸变小;ABS对PBT/PC共混体系具有明显的增韧作用,当ABS质量分数为10%时,共混物缺口冲击强度达到1300 J/m,实现超韧。
Acrylonitrile-butadiene-styrene（ABS） was used to toughen poly（butylene terephthalate）（PBT） and polycarbonate（PC） blends.Dynamic mechanical thermal analysis（DMTA） test shows PBT and PC are thermodynamics immiscible.The addition of ABS makes the Tg of PBT and PC shift together and improve the miscibility of PBT and PC.Differential scanning calorimetry（DSC） test indicates that the crystallization and melt temperature of PBT phase in the PBT/PC blends shift to lower temperature since the ABS introduction which inhibits the crystallization process of PBT.Scanning electron microscope（SEM） shows that ABS disperses in PBT/PC matrix uniformly and the addition of ABS makes the phase domain size of PC decrease.The toughness of PBT/PC blends is improved significantly by ABS.When the mass fraction of ABS is 10%,notched impact strength of 1300 J/m is achieved,showing the super-toughness.
参考文献
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