嵌段大分子偶联剂的合成及其对三元乙丙橡胶复合材料性能的影响

Synthesis of block macromolecular coupling agent and its effect on ethylene-propylene-diene monomer composite

以苯乙烯(St)、甲基丙烯酸丁酯(BMA)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)为单体,通过原子转移自由基聚合(ATRP)制备嵌段形大分子偶联剂。通过红外光谱(FT-IR)、核磁共振(1 H-NMR)和凝胶渗透色谱(GPC)对大分子偶联剂的结构和组成进行表征。对比研究不同分子量的大分子偶联剂对三元乙丙橡胶(EPDM)/二氧化硅(SiO2)复合材料性能的影响。结果表明:经大分子偶联剂处理SiO2后,复合材料的界面相容性得到改善,拉伸强度为4.76MPa,比未添加偶联剂的复合材料提高了68.20%。

Block macromolecular coupling agent was synthesized by atom transfer radical polymerization（ATRP）using styrene（St）,butyl methacrylate（BMA）andγ-methacryloxypropyltrimethoxy silane（KH-570）as monomers.The infrared spectrum（FT-IR）,nuclear magnetic resonance spectroscopy（1 H-NMR）and gel permeation chromatography（GPC）were used to characterize the structure and composition of macromolecular coupling agent.The results showed that the interface adhesion of composite was improved significantly after SiO2 surface treated by macromolecular coupling agents.Furthermore,the tensile strength of composites was increased up to 68.20% when comparing with that of composite without coupling agent.