Telechelic polymers by living and controlled/living polymerization methods

Telechelic polymers, defined as macromolecules that contain two reactive end groups, are used as cross-linkers, chain extenders, and important building blocks for various macromolecular structures, including block and graft copolymers, star, hyperbranched or dendritic polymers. This review article describes the general techniques for the preparation of telechelic polymers by living and controlled/living polymerization methods; namely atom transfer radical polymerization, nitroxide mediated radical polymerization, reversible addition-fragmentation chain transfer polymerization, iniferters, iodine transfer polymerization, cobalt mediated radical polymerization, organotellurium-, organostibine-, organobismuthine-mediated living radical polymerization, living anionic polymerization, living cationic polymerization, and ring opening metathesis polymerization. The efficient click reactions for the synthesis of telechelic polymers are also presented.     

高气压脉冲DBD等离子体聚合羧基功能薄膜的研究

在40kHz脉冲介质阻挡放电（DBD）产生等离子体，以丙烯酸为单体，在2000Pa的高气压下，聚合带羧基的功能薄膜。采用接触角测试仪（WCA）、傅里叶红外光谱仪（FTIR）、X光电子能谱（XPS）研究了占空比对沉积薄膜化学结构、表面性能的影响。实验得到，中频脉冲DBD放电在高气压下制备的薄膜官能团含量较高；结果同时表明薄膜的性能受脉冲放电占空比的影响较大，占空比越小，薄膜的化学结构与单体更相近，官能团密度越多，但薄膜的稳定性较差。     

介质阻挡放电等离子体合成羧基功能薄膜及其细胞黏附性研究

本文的目的是利用介质阻挡放电制备聚丙烯酸生物功能薄膜.利用接触角测量仪,傅立叶变换红外光谱(FT-IR),原子力显微镜(AFM),X射线光电子能谱(XPS)对功能薄膜进行表征.通过体外细胞培养和富血血小板黏附实验,讨论了含有羧基功能团薄膜的结构、成分以及性能对其生物相容性的影响.实验表明:等离子放电参数对合成羧基功能薄膜的结构和成分有较大影响,且聚合的羧基功能薄膜能较好地促进细胞在其表面的黏附以及生长.