SYNTHESIS OF HIGH MOLECULAR WEIGHT POLY[3-{TRIS(TRIMETHYLSILOXY)SILYL} TRICYCLONONENES-7] AND THEIR GAS PERMEATION PROPERTIESстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 апреля 2017 г.
Аннотация:A study was conducted to demonstrate the synthesis of high molecular weight polynorbornenes of poly[3-{tris(trimethylsiloxy)silyl}tricyclononenes-7] containing three pendant Me 3Si-O groups and investigate their gas permeation properties. The aim of the synthetic strategy was in shift of hindered Me 3Si groups from the double bond. This strategy allowed the synthesis of a novel 3-{tris(trimethylsiloxy)silyl}tricyclo[4.2.1.0] non-7-ene (III) on the basis of thermal condensation of vinyltrichlorosilane with quadricyclane. The monomer III was successfully polymerized by ring-opening metathesis polymerization (ROMP) mechanism in the presence of first generation Grubbs catalyst. The assumption of reactivation of norbornene double bond by the removal of bulky -Si(OSiMe 3) 3 groups was also confirmed by successful addition polymerization of III in the presence of Pd-containing catalyst systems