نتایج جستجو برای: homopolymerization
تعداد نتایج: 160 فیلتر نتایج به سال:
Control over polymer sequence and architecture is crucial to both understanding structure-property relationships and designing functional materials. In pursuit of these goals, we developed a new synthetic approach that enables facile manipulation of the density and distribution of grafts in polymers via living ring-opening metathesis polymerization (ROMP). Discrete endo,exo-norbornenyl dialkyle...
Polyester synthesis activity of immobilized Humicola insolens (HiC) was systematically studied with three-series of substrates varying in (i) omega-hydroxyalkanoic acid (omegaHA), (ii) alpha,omega-n-alkane diol, and (iii) alpha,omega-n-alkane diacid chain length. Covalent immobilization of HiC on Amberzyme oxirane (AO) resin (i.e., AO-HiC) was prepared. HiC-AO's activity for omegaHA substrates ...
SUPERCRITICAL CO2 BY AN ELECTRON POOR NI(II) COMPLEX Damien Guironnet and Stefan Mecking* Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, Germany. Introduction Late transition metal catalysts for polymerization of olefins have been studied intensely. Due to their functional group tolerance, polymerizations can be carried out in oxygenated reaction media, am...
atom transfer radical polymerization of styrene (st) and methyl methacrylate (mma) was performed at 90oc in the absence and presence of nanoclay (cloisite 30b). trichloromethyl-terminated poly(vinyl acetate) telomerand cucl/ pmdeta were used as a macroinitiator and catalyst system, respectively. the experimental results showed that the atom transfer radical polymerization of st and mma in the a...
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