聚氨酯-丙烯酸酯-环氧大豆油复合乳液的合成与性能  

Preparation and Properties of Waterborne Polyurethane-acrylate-epoxidized Soybean Oil Hybrid Emulsion

作　　者：郭文杰[1] 傅和青[1] 司徒粤[1] 徐丽[1] 蓝仁华[1] 陈焕钦[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《林产化学与工业》2009年第3期31-37,共7页Chemistry and Industry of Forest Products

基　　金：广东省关键领域重点突破招标项目(20050106)

摘　　要：采用环氧大豆油(ESO)、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、丙烯酸-2-羟丙酯(HPA)改性水性聚氨酯,制得以丙烯酸酯为核、聚氨酯为壳的核壳结构聚氨酯-丙烯酸酯-环氧大豆油复合乳液。用红外光谱仪(FT-IR)、马尔文粒度分析仪等测试手段对合成产物进行了结构和性能的表征。考察了工艺参数对聚合过程的影响,以及ESO和MMA用量对复合乳液及其胶膜性能的影响。结果表明,较佳的工艺条件为预聚温度80℃,时间1.5h;扩链温度70℃,时间4～5h;中和温度40℃,加水乳化分散时间为10min,转速为6000r/min;乳液聚合温度70℃,时间为4～5h;当ESO用量为4%～6%、甲基丙烯酸甲酯用量为30%时,可制得粒径较小贮存稳定性好的聚氨酯-丙烯酸酯-环氧大豆油复合乳液,该复合乳液的胶膜耐介质性好、吸水率低。Waterborne polyurethane （WPU） was modified by epoxidized soybean oil （ ESO）, methyl methacrylate （ MMA ）, butyl acrylate （BA） and 2-hydroxypropyl acrylate （ HPA）, to obtain polyurethane-acrylate-ESO hybrid emulsion which has a core-shell structure with acrylate as core and polyurethane as shell. The structure and properties of the hybrid emulsion were characterized by Fourier transform infrared （FT-IR） spectra and particle size analyzer. Effects of process parameters on polymerization and dosages of ESO and MMA on properties of the hybrid emulsion and its films were investigated. Results showed that the optimal process was as follows： temperatures of prepolymerization, chain-extending, neutralization and emulsion polymerization were 80, 70,40 and 70℃, respectively, times of prepolymerization, chain-extending, emulsion polymerization were 1.5,4-5 and 4-5 h, respectively, and rotation rate was 6 000 r/min. When contents of ESO and MMA were 4 %-6 % and 30 % , respectively, hybrid emulsion with small particle size and good store stability was prepared. Its film had good media resistance and low water absorption.

关 键 词：聚氨酯 丙烯酸酯 环氧大豆油 复合乳液 核壳 

分 类 号：TQ433[化学工程]