ABS接枝共聚物核壳比对ABS树脂性能的影响
|
摘要
采用乳液聚合技术,通过改变聚丁二烯(PB)与共聚单体的投料比合成了一系列不同核壳比的ABS(丙烯腈-丁二烯-苯乙烯)接枝共聚物,将其与SAN树脂熔融共混制备ABS树脂。利用动态力学分析仪(DMA)和扫描电子显微镜(SEM)对ABS树脂的结构与性能进行了表征。结果发现:共混物(ABS树脂)的冲击强度随着接枝共聚物核壳比的增加呈现先增大后减小的趋势,而拉伸强度变化则不明显;橡胶相最大介质损耗因数((tanδ)_(max))的大小取决于接枝共聚物的核壳比;由核壳比为70/30的接枝共聚物制备的共混物表现出明显的韧性断裂特征,这与力学测试的结果相符。
A series of ABS(acrylonitrile-butadiene-styrene) grafted copolymers with different coreshell ratio were synthesized by changing the feeding proportion of polybutadiene(PB) and comonomer. And ABS resin was successfully prepared by means of melt blending ABS grafted copolymer with SAN copolymer. The structure and performance of the blends(ABS resin) were investigated by using DMA and SEM. It is found that with the increase of core-shell ratio of ABS grafted copolymer, the Izod impact strength of the blends increases first and then decreases, but the tensile behavior almost unchanges. The(tanδ)_(max) of rubber phase depends on the coreshell ratio of ABS grafted copolymers. The blends prepared by ABS grafted copolymer with 70/30 core-shell ratio fracture in ductile mode, which is consistent with the mechanical test results.
A series of ABS(acrylonitrile-butadiene-styrene) grafted copolymers with different coreshell ratio were synthesized by changing the feeding proportion of polybutadiene(PB) and comonomer. And ABS resin was successfully prepared by means of melt blending ABS grafted copolymer with SAN copolymer. The structure and performance of the blends(ABS resin) were investigated by using DMA and SEM. It is found that with the increase of core-shell ratio of ABS grafted copolymer, the Izod impact strength of the blends increases first and then decreases, but the tensile behavior almost unchanges. The(tanδ)_(max) of rubber phase depends on the coreshell ratio of ABS grafted copolymers. The blends prepared by ABS grafted copolymer with 70/30 core-shell ratio fracture in ductile mode, which is consistent with the mechanical test results.
引文
[1]何曼君,陈维孝,董西侠.高分子物理[M].上海:复旦大学出版社,1990.
[2]王荣伟,杨为民.ABS树脂及其应用[M].北京:化学工业出版社,2011.
[3]张明耀.ABS树脂的形态结构设计和性能优化[D].沈阳:东北大学,2003.
[4]张明耀,徐新峰,杨海东,等.橡胶粒子的粒径和粒径分布对ABS树脂形态结构和力学性能的影响[J].塑料工业,2000,28(4):32-33.
[5]陈斌,任亮.ABS改性剂的核壳比对CPVC/ABS共混物性能的影响[J].化工新型材料,2011,39(9):135-137.
[6]陈斌,张占梅,王旭东.PB橡胶粒径对CPVC/PVC/ABS共混体系结构与性能的影响[J].广州化工,2011,39(21):64-66.
[7]L Morbitzer,D Kranz,G Humme,et al.Structure and properties of ABS polymers.X.Influence of particle size and graft structure on loss modulus temperature dependence and deformation behavior[J].Journal of Applied Polymer Science,1976,20:2 691-2 704.
[2]王荣伟,杨为民.ABS树脂及其应用[M].北京:化学工业出版社,2011.
[3]张明耀.ABS树脂的形态结构设计和性能优化[D].沈阳:东北大学,2003.
[4]张明耀,徐新峰,杨海东,等.橡胶粒子的粒径和粒径分布对ABS树脂形态结构和力学性能的影响[J].塑料工业,2000,28(4):32-33.
[5]陈斌,任亮.ABS改性剂的核壳比对CPVC/ABS共混物性能的影响[J].化工新型材料,2011,39(9):135-137.
[6]陈斌,张占梅,王旭东.PB橡胶粒径对CPVC/PVC/ABS共混体系结构与性能的影响[J].广州化工,2011,39(21):64-66.
[7]L Morbitzer,D Kranz,G Humme,et al.Structure and properties of ABS polymers.X.Influence of particle size and graft structure on loss modulus temperature dependence and deformation behavior[J].Journal of Applied Polymer Science,1976,20:2 691-2 704.