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.     

PMAH—AM—MA的合成及其阻垢性能研究

以水为溶剂,马来酸酐（PMAH）、丙烯酰安（AM）、丙烯酸甲酯为单体,过氧化二苯甲酰为引发剂,合成了水溶性的聚合物聚马来酸酐-丙烯酰胺-丙烯酸甲酯,并研究了单体的配比,聚合浓度,以及投加量对阻垢性能的影响。试验结果表明,PMAM是一种水溶性的高效多功能阻垢剂。其阻碳酸钙垢的效果达86.79%,阻磷酸钙垢的效果达94.27%;阻硫酸钙垢的效果达90.08%,同时对稳定锌和分散氧化铁也具有一定的功效。