聚氨酯表面接枝丙烯酸甲酯改性研究  

Surface modification of polyurethane by grafting methyl acrylate via ATRP

作　　者：邓锋杰[1] 李卫凡[1] 徐少华[1] 陈义旺[2] 

机构地区：[1]南昌大学化学系,南昌330031 [2]南昌大学材料科学与工程学院,南昌330031

出　　处：《化工新型材料》2008年第3期68-70,共3页New Chemical Materials

摘　　要：对聚氨酯(PU)的表面进行除油、除污等预处理,然后表面经甲苯-2,4-二异氰酸酯(TDI)活化,在表层形成未反应的自由异氰酸酯基团(NCO)。再通过2-溴乙醇与表面自由的异氰酸酯基团反应,在表层形成溴原子端基。该原子在催化剂氯化亚铜(CuCl)和配体2,2-联二吡啶(Bpy)的存在下,将丙烯酸甲酯通过原子转移自由基聚合(ATRP)接枝到PU表面。动力学研究揭示,丙烯酸甲酯的接枝率与反应时间成线性关系:表明表面链增长反应为可控活性聚合。使用衰减全反射傅立叶红外光谱(ATR-FTIR)和X-射线光电子能谱(XPS)表征分析每一步处理后的PU膜片。After treatment of removing oil and cleaning the surface, polyurethane membrane surface was activated by toluene diisocyanate （TDI）, so as to form free isocyanate groups （NCO） on the membrane surface. And Br group was grafted by the reaction of free NCO and the hydroxyl group of 2-Bromoethanol. Such Br group can initiate polymerization of methyl acrylate via atom transfer radial polymerization （ATRP）, in the condition of Copper （I） Chloride （CuCl） and 2, 2-Bipyridine （Bpy）. Kinetics study showed a linear increase in the grafting polymerization of methyl acrylate with the reaction time, which was indicating that the chain growth from the surface is a ‘living＇ process. The chemical composition and topography of each step modified polyurethane membrane were detected by attenuated total reflectance spectroscopy （ATR- FTIR） and X-ray photoelectron spectroscopy （XPS）.

关 键 词：聚氨酯 表面处理 丙烯酸甲酯 

分 类 号：TQ316.343[化学工程—高聚物工业]