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Influence of Initiator on Synthesis and Properties of Polyurethane-acrylate Hybrid Emulsion

查看全文 作　　者：[1,2]胡国文;SHEN [1]Huifang;FU [1]Heqing;CHEN [1]Huanqin 高影响力作者 机构地区：[1]School of Chemical Engineering, South China University of Technology, Guangzhou 510640, China;;[2]Department of Chemistry & Life Science, Xianning Colloge, Xianning 437100, China高影响力机构 出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2008年第23卷第1期,共5页高影响力期刊 基　　金：the Bidding Project of the Industrialization Technology of High Performance Polymer Emulsion and-Aqueous Wood Coating from YueGang Key Fields of Technology(No.B10-B2050260) 摘　　要：The prepolymer polyurethanes(PUs)based on isophorone diisocyanate(IPDI),poly(propylene glycol)(PPG),1,4-butanediol(BDO)and dimethylopropionic acid(DMPA)were synthesized at 75-80℃for 7-8 hours,using dibutyltin dilauate(DBTDL)as catalyzer,and polyurethane-acrylate hybrid emulsion was prepared after methyl methacrylate(MMA)was polymerized,using potassium persulfate and azobisisobutyronitrile (AIBN)as initiator,respectively.The influences of these factors such as the kind of initiator,the feed method of initiator and the addition of initiator on properties of polyurethane-acrylate were studied.The FTIR and GPC of aqueous polyurethane were analyzed.The FTIR spectra show that the degree of mierophase-separate between the soft segments and rigid segments is high.The analysis of molecular weights stated that molecular weights increased most significantly after amine was added.The experimental results reveal that the appearance of emulsion is excellent,the film is harder and the water absorption radio of the film is less when oil-solubility AIBN is used as initiator.The semi-continuous can increase the molecular weight of polymer and the optimum amount of the initiator was 3% for MMA. 关 键 词：聚氨酯-丙烯酸盐 乳状液 合成 性能
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