N-（4-羟基苯基）马来酰亚胺改性水性聚氨酯—丙烯酸酯的制备及性能

Preparation and Properties of Waterborne Polyurethane?acrylate Modified by 4-Maleimidophenol

摘要:

采用原位聚合法，以异佛尔酮二异氰酸酯（IPDI）、聚己内酯二元醇（PCL）、2，2-二羟甲基丙酸（DMPA）、三羟甲基丙烷（TMP）、N-（4-羟基苯基）马来酰亚胺（4-HPM）、甲基丙烯酸甲酯（MMA）和丙烯酸丁酯（BA）等为主要原料，制备得到了4-HPM改性的阴离子水性聚氨酯—丙烯酸酯（MWPUA）乳液。利用傅里叶变换红外光谱（FT-IR）、透射电镜（TEM）、X射线衍射（XRD）、热失重分析（TGA）、拉伸测试等表征了聚合物的结构与性能，并研究了4-HPM用量对MWPUA乳液及其膜性能的影响。结果表明，MWPUA乳胶粒呈球形，具有核—壳结构。当w(4-HPM)=3.0wt%时，所得乳液粒径较小且分布窄，平均粒径为97.8nm，与水性聚氨酯（WPU）相比，合成的MWPUA胶膜的结晶性较好，热稳定性得到提高，最大热分解速率降低至8.1%，拉伸强度达到24.9MPa，接触角达到103.2?，吸水率低至8.8%。

Abstract:

A series of 4-maleimidophenol modified anionic waterborne polyurethane—acrylate (MWPUA) emulsions were prepared by in-situ polymerization with isophorone diamine (IPDI), poly-caprolactone diol (PCL), 2,2-dimethylolpropionic acid (DMPA), trimethylol propane (TMP), 4-maleimidophenol (4-HPM), methyl methacrylate (MMA) and butyl acrylate (BA) as main raw materials. Structure and properties of polymer were characterized by FT-IR, TEM, XRD, TGA and tensile testing. The effects of the content of 4-HPM on the properties of MWPUA emulsion and its films were also studied. The results showed that latex particle is ball-like, and has a core-shell structure. When w(4-HPM)=3.0wt%, the average particle size was 97.8 nm with narrow particle size distribution. Compared with the pure waterborne polyurethane (WPU), the crystallinity and thermal stability of MWPUA latex film has improved. The maximum decomposition rate of film decreased 8.1%, the tensile strength was up to 24.9MPa, water contact angle reached 103.2? water absorption ratio was as low as 8.8%.