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Vinyl Addition Copolymerization of Norbornene/5-Vinyl-2-norbornene with Cationic $\eta^{3_}$-Allyl Palladium Catalyst and Their Post-Reaction  

안재철 (한국과학기술연구원 광전자재료 연구센터)
박수현 (인하대학교 고분자공학과)
이광희 (인하대학교 고분자공학과)
박기홍 (한국과학기술연구원 광전자재료 연구센터)
Publication Information
Polymer(Korea) / v.27, no.5, 2003 , pp. 429-435 More about this Journal
Abstract
Vinyl addition copolymerizations of norbornene (NB) and 5-vinyl-2-norbomene (VNB) were carried out using a cationic η$^3$-allyl palladium catalyst in the various mole ratio of comonomers. The copolymers could be obtained in good yield (65∼85%) with high weight-average molecular weights (M$_{w}$ > 760,000). Depending on increasing VNB contents, the molecular weight and yield of the copolymers decreased. FT-IR analysis confirmed that actual contents of VNB in polymer were proportional to the feeding content of VNB. From $^1$H-NMR spectroscopy, we found that both exo and endo VNB isomer were copolymerized with NB. Thermal stabilities of NB-VNB copolymers were independent on the VNB content and their initial decomposition temperatures were about 300 C. The NB-VNB copolymers were followed by epoxidation by using m-CPBA and hydroxylation by 9-BBN, respectively, and these post-polymers were characterized by FT-IR spectroscopy and $^1$H-NMR analysis..
Keywords
allyl palladium; norbornene; 5-vinyl-2-norbornene; vinyl addition polymerization; epoxidation; hydroxylation;
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