乙烯基单体改性蓖麻油基水性聚氨酯的研究

涂料工业 ›› 2013, Vol. 43 ›› Issue (2): 43-47.

乙烯基单体改性蓖麻油基水性聚氨酯的研究

鲍利红^1，2，兰云军²，张淑芬³

1、北京服装学院材料科学与工程学院，北京 100029; 2、温州大学化学与材料工程学院，浙江温州 325027; 3、大连理工大学精细化工国家重点实验室，辽宁大连 116024

出版日期:2013-02-28 发布日期:2019-05-31
作者简介:鲍利红(1977—)，女，博士，讲师，研究方向:功能高分子材料。

Study on Vinyl Monomer Modified Waterborne Polyurethane Based on Castor Oil

Bao Lihong^1,2, Lan Yunjun ², Zhang Shufen³

1. School of Material Science and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China; 2. College of Chemistry and Material Engineering, Wenzhou University, Wenzhou, Zhejiang 325027,China; 3. State Key Lab of Fine Chemical, Dalian University of Technology, Dalian, Liaoning 116024, China

Online:2013-02-28 Published:2019-05-31

摘要/Abstract

摘要： 采用改性蓖麻油合成了软段中含不饱和双键的阴离子聚氨酯水分散液(MCPU)，将其作为可聚合乳化剂和种子成分，分别与甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、苯乙烯(St)单体进行共聚，制得了PUA复合乳液MCPUA-MMA、MCPUA-BA和 MCPUA-St。利用 TEM、FT-IR、TG、DSC、XRD等手段考察了乳液及成膜的微观结构和性能。结果表明:MCPUA-MMA粒子形态不规整，MCPUA-BA和 MCPUA-St粒子具有较清晰的核壳结构;红外谱图中3300~3350cm^-1处氢键化—NH吸收峰位置显示由 MCPU到 MCPUA-St、MCPUA-BA、MCPUA-MMA依次向低波移动;DSC研究表明 PUA的 T_g1相对于 MCPU升高，MCPUA-BA和 MCPUA-St的 T_g2对应于 MCPU下降，而MCPUA-MMA的 T_g2相对 MCPU升高;PUA胶膜的 T_max2相对 MCPU均明显移向高温，膜的热稳定性提高;XRD表明合成的复合乳液膜均呈现出无定形形态。

关键词: 水性聚氨酯, 乙烯基单体, 复合乳液, 性能

Abstract: A kind of anionic polyurethane dispersion(MCPU) containing unsaturated double bonds in the soft segments was synthesized with modified castor oil, and it was treated as polymerisable emulsifier and seed composition for emulsion copolymerization of MCPU and different vinyl monomers, such as methyl methacrylate(MMA), butyl acrylate(BA) and styrene (St)to prepare MCPUA-MMA, MCPUA-BA and MCPUA-St hybrid emulsions. Then TEM, laser particle size distribution analyzer, FT-IR,TG, DSC and XRD were used to characterize the morphology and properties of the emulsions and films. The results showed that MCPUA- MMA had irregular particle form, while MCPUA-B and MCPUA-St showed clear core-shell structures.The position of hydrogen bonded -NH absorptions at 3 300-3 350 cm^-1decreased at a sequence of MCPU, MCPUA-St, MCPUA-BA and MCPUA-MM. The DSC tests indicated that T_g1 of PUA increased compared with MCPU, T_g2 of MCPUA -BA and MCPUA-St decreased compared with MCPU, but T_g2 of MCPUA-MMA increased. T_max2 of all the PUA films moved to the high temperature compared with MCPU, the heat stability of al the PUA films increased. XRD results showed that all the films were amorphous.

Key words: waterborne polyurethane, vinyl monomer, hybrid emulsions, properties

鲍利红, 兰云军, 张淑芬. 乙烯基单体改性蓖麻油基水性聚氨酯的研究[J]. 涂料工业, 2013, 43(2): 43-47.

Bao Lihong , Lan Yunjun , Zhang Shufen. Study on Vinyl Monomer Modified Waterborne Polyurethane Based on Castor Oil[J]. Paint & Coatings Industry, 2013, 43(2): 43-47.

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