摘要
以苯乙烯(St)为共聚单体,以甲基丙烯酸缩水甘油酯(GMA)和马来酸酐(MAH)为接枝单体,将其与聚苯乙烯-乙烯-丁二烯苯乙烯(SEBS)共混,采用自由基熔融接枝技术制备SEBS-g-(GMA-co-St)、SEBS-g-(MAH-co-St)和SEBS-g-(GMA/MAH-co-St)接枝共聚物.将所制备的的接枝共聚物作为相容剂与聚丙烯(PP)和SEBS熔融共混,研究了接枝共聚物中接枝单体种类对PP/SEBS共混物的热学性能、光学性能、力学性能和微观结构的影响.结果表明:在PP/SEBS共混体系中引入SEBS接枝共聚物后,共混物的综合性能均有不同程度的增加;GMA被用作接枝单体制备的SEBS-g-(GMA-co-St)使PP/SEBS共混物的性能增幅最为显著,极大地改善了PP和SEBS的相容性,进而显著提高了共混物的冲击韧性;PP/SEBS/SEBS-g-(GMA-co-St)共混物的冲击强度和断裂伸长率均达到最大值,分别为30165.82 J/m^(2)和1482.40%,呈现出典型的韧性断裂特征,断面呈现出褶皱状韧性断裂、多层断裂的现象,且共混物的拉伸强度基本保持不变.此外,接枝共聚物的引入提高了共混物的热稳定性,并很好地保持了共混物的高透过率,使共混物整体表现出优异的光学性能.
Styrene(St)was utilized as a co-monomer,while glycidyl methacrylate(GMA)or maleic anhydride(MAH)was employed as graft monomers.These graft monomers were then blended with polystyrene-ethylene-butylene-styrene(SEBS)and prepared into SEBS-g-(GMA-co-St),SEBS-g-(MAH-co-St),and SEBS-g-(GMA/MAH-co-St)graft copolymers using the melt free radical grafting technique.Subsequently,these graft copolymers were utilized as compatibilizers for melt blending with polypropylene(PP)and SEBS,and their effects on the thermal,optical,mechanical properties,and microstructure of the PP/SEBS blends were investigated.The results showed that after introducing SEBS graft copolymers into PP/SEBS blends,the comprehensive properties of the blends increased to varying degrees,and the performance increase was most significant when GMA was used as the graft monomer.SEBS-g-(GMA-co-St)graft copolymer with GMA as the graft monomer greatly improved the compatibility between PP and SEBS,and significantly enhanced the impact toughness of the blends.The impact strength and elongation at break of the blends reached a maximum value,which were 30165.82 J/m^(2)and 1482.40%,respectively,exhibiting typical ductile fracture characteristics with folded toughening and multi-layer fracture on the fracture surface,while the tensile strength of the blends remained almost unchanged.In addition,the introduction of the graft copolymer improved the thermal stability of the blends and maintained their high transmittance,showing excellent optical properties.
作者
杨冰
王伟
迟卫瀚
丛飞
李永超
王元霞
宋立新
YANG Bing;WANG Wei;CHI Weihan;CONG Fei;LI Yongchao;WANG Yuanxia;SONG Lixin(Shenyang University of Chemical Technology,Shenyang 110142,China)
出处
《沈阳化工大学学报》
CAS
2023年第6期506-517,共12页
Journal of Shenyang University of Chemical Technology
基金
辽宁省教育厅青年科技人才“育苗”项目(LQ2020007)。
作者简介
杨冰(1999-),男,河南新乡人,硕士研究生在读,主要从事材料加工改性方面的研究;通信联系人:宋立新(1983-),男(满族),辽宁鞍山人,讲师,博士,主要从事高分子材料强韧化方面的研究.
