马来酸酐改性聚醋酸乙烯酯乳液的研究  

Study on polyvinyl acetate emulsion modified by maleic anhydride

作　　者：肖富昌[1] 刘海英[1] 张彦华[1] 顾继友[1] 

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,黑龙江哈尔滨150040

出　　处：《中国胶粘剂》2013年第6期6-8,共3页China Adhesives

基　　金：国家自然科学基金项目(31270609);中央高校基本科研业务费专项基金项目(DL09BB13)

摘　　要：以马来酸酐(MA)作为醋酸乙烯酯(VAc)的改性共聚单体,采用半连续种子乳液聚合法合成了改性聚醋酸乙烯酯(PVAc)乳液,并考察了MA含量对VAc/MA共聚乳液性能的影响。结果表明:当w(MA)=0.3%～0.4%(相对于VAc质量而言)时,改性乳液的聚合稳定性、储存稳定性和稀释稳定性良好;随着MA含量的不断增加,种子反应阶段回流时间延长,共聚速率变慢,最终合成的改性乳液黏度逐渐增大;当w(MA)=0.4%时,改性乳液的综合性能相对最好,其粘接强度(9.70 MPa)比VAc均聚乳液增加了70%。With maleic anhydride （MA） as a modified comonomer of vinyl acetate （VAc）, a modified polyvinyl acetate（PVAc） emulsion was synthesized by semi-continuous seed-emulsion polymerization method, and the influences of MA contents on properties of VAc/MA copolymer emulsion were investigated. The results showed that the modified emulsion had good polymerization stability, storage stability and dilution stability when mass fraction of MA was 0.3%-0.4% in VAc. The refluence time was extended at seed reaction stage,eopolymerization speed was slowed down, and the viscosity of finally synthetical modified emulsion was gradually increased with increasing MA contents. The modified emulsion had the relatively optimal combination property because the bonding strength（9.70 MPa） of modified emulsion was 70% more than that of VAc homopolymer emulsion when mass fraction of MA was 0.4%.

关 键 词：醋酸乙烯酯 马来酸酐 共聚改性 乳液聚合 

分 类 号：TQ433.433[化学工程]