以羟基封端的聚二甲基硅氧烷和α-溴代异丁酰溴为原料,制备了双官能度Br-PDMS-Br,并以此为大分子引发剂,CuCl和2,2’-联吡啶为催化剂,通过原子转移自由基聚合制备了聚甲基丙烯酸丁酯-聚二甲基硅氧烷-聚甲基丙烯酸丁酯(PBMA-b-PDMS-b-PBMA)三嵌段聚合物。利用傅里叶变换红外光谱仪(FT-IR)、核磁(1 H NMR)、凝胶渗透色谱分析仪(GPC)、热失重分析仪(TGA)、接触角测试仪、扫描电子显微镜(SEM)对三嵌段聚合物的结构及聚合反应进行了表征与测试。结果表明三嵌段聚合物具有较好的热稳定性、疏水性和微相分离。
Polymers grafted from solid surface are being extensively studied with a range of objectives.The most popular living/controlled polymerization used in polymers grafted from solid surfaces is the surface-initiated atom transfer radical polymerization(SI-ATRP)[1,2].An attractive feature of atom transfer radical polymerization(ATRP) is to simultaneously grow chains from multifunctional surface.Thus the grafted polymer with well-defined structures could be designed and controlled.ATRP has proven to be a powerful tool to synthesize homopolymers and copolymers,under easily accessible experimental conditions[3-7].Furthermore it is useful for the functionalization of material surfaces by grafting certain polymers.
