星型和线性倍半硅氧烷-聚丙交酯杂化共聚物
Star-Shaped and Linear POSS-Polylactide Hybrid Copolymers.
作者信息
Rozga-Wijas Krystyna, Stanczyk Wlodzimierz A, Kurjata Jan, Kazmierski Slawomir
机构信息
Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
出版信息
Materials (Basel). 2015 Jul 17;8(7):4400-4420. doi: 10.3390/ma8074400.
Novel octakis-2[(6-hydroxyhexyl)thio]ethyl-octasilsesquioxane (POSS-S-OH) as well as heptaisobutyl-2[(6-hydroxyhexyl)thio]ethyl-octasilsesquioxane (iBu-POSS-S-OH) were synthesized. POSS structures, bearing both types of groups , 2[(6-hydroxyhexyl)thio]ethyl and the vinyl ones, pendant from the octahedral cage are also described. The synthetic pathway involved thiol-ene click reaction of 6-mercapto-1-hexanol (MCH) to octavinyloctasilsesquioxane (POSS-Vi), and heptaisobutylvinyloctasilsesquioxane (iBu-POSS-Vi), in the presence of 2,2'-azobisisobutyronitrile. The functionalized silsesquioxane cages of regular octahedral structure were used further as initiators for ring opening polymerization of L,L-dilactide, catalyzed by tin (II) 2-ethylhexanoate. The polymerization afforded biodegradable hybrid star shape and linear systems with an octasilsesquioxane cage as a core, bearing polylactide arm(s).
合成了新型八（2-[(6-羟基己基)硫代]乙基）倍半硅氧烷（POSS-S-OH）以及七异丁基-2-[(6-羟基己基)硫代]乙基倍半硅氧烷（iBu-POSS-S-OH）。还描述了八面体笼状结构上带有2-[(6-羟基己基)硫代]乙基和乙烯基这两种基团的POSS结构。合成途径涉及在2,2'-偶氮二异丁腈存在下，6-巯基-1-己醇（MCH）与八乙烯基倍半硅氧烷（POSS-Vi）以及七异丁基乙烯基倍半硅氧烷（iBu-POSS-Vi）发生硫醇-烯点击反应。具有规则八面体结构的功能化倍半硅氧烷笼进一步用作辛酸亚锡催化的L,L-二丙交酯开环聚合的引发剂。该聚合反应得到了以倍半硅氧烷笼为核心、带有聚丙交酯臂的可生物降解杂化星形和线性体系。
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