摘要
目的研究苯乙烯-马来酸酐无规共聚物(R-SMA)增强的室温硫化硅橡胶的制备方法及力学性能。方法以过氧化苯甲酰(BPO)为引发剂,使苯乙烯(St)和马来酸酐(M a)在α,ω-羟基聚二甲基硅氧烷(PDMS)中无规共聚,得到宏观上稳定的PDMS/R-SMA共混物。在该共混物中加入过量的甲基三乙氧基硅烷(MTES)对其进行室温硫化,得到R-SMA增强的室温硫化硅橡胶,并测定其力学性能。结果当PDMS/St=70/30(w/w),St/M a=96.5/3.5(w/w),BPO用量为单体总量的0.08 wt%,反应时间为5 h时,目标硅橡胶的力学性能最佳,其拉伸强度可达到2.162 MPa,断裂伸长率为332.7%。结论目标硅橡胶的力学性能明显优于未增强的PDMS弹性体,R-SMA组分的存在起到了明显的增强效果。
Objective:To study the preparation and mechanical properties of room temperature vulcanized silicone rubber reinforced by styrene-maleic anhydride random copolymer(R-SMA).Methods: PDMS/R-SMA blends were prepared by random copolymerization of styrene(St) and maleic anhydride(Ma) in the presence of α,ω-dihydroxy-polydimethylsiloxane(PDMS),using benzoyl peroxide(BPO) as initiator.The blends obtained with this method were stable gums without macroscopic phase separation.The objective silicone rubber was prepare...
出处
《泰山医学院学报》
CAS
2008年第4期248-250,共3页
Journal of Taishan Medical College
基金
泰安市大学生科技创新引导计划项目资助(编号:2007D1042)
关键词
室温硫化硅橡胶
苯乙烯-马来酸酐无规共聚物
力学性能
room temperature vulcanized silicone rubber
styrene-maleic anhydride random copolymer
mechanical properties
