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。
The surface ofpoly（ethylene terephthalate）（PET） films is inert, hydrophobic, and incompatible with blood, which has limited its practical bioapplication. In this case, better biocompatibility could be achieved by surface modification. In this study, the grafted copolymer of functional methoxypolyethylene glycol（mPEG） derivatives and styrene from the PET surfaces was prepared via surface-initiated atom transfer radical polymerization（SI-ATRP）. The structures, composition, properties and surface morphology of the grafted PET films were characterized by Fourier transform infrared spectroscopy（FTIR）, X-ray photoelectron spectroscopy（XPS）, contact angle measurements and scanning electronic microscopy（SEM）. The results indicate that the surface of the PET films has been covered by a thick targeted copolymer layer that converted the hydrophobic surface of PET to an amphiphilic surface. The bacte- rial adhesion and cell culture results indicate the copolymer-grafted PET film may possess good biocompatibility.
MA YanhongJIANG YanLIANG YuanZHANG WeiweiZHANG HongwenZHANG Rong
