Abstract
Highly syndiotactic PMMA macromonomer having methacryloyl group as a polymerizable function was prepared from the corresponding living PMMA anion formed with t-C4H9Li/(n-C4H9)3Al (1/3) in toluene at −78°C. Anionic copolymerization of the macromonomer with methyl (MMA) or ethyl methacrylate was carried out with anionic initiators. Copolymerization with 1,1-diphenylhexyllithium in tetrahydrofuran at −78°C gave graft polymers with syndiotactic main chain in high yields. Copolymerization with t-C4H9MgBr in toluene at −78°C afforded graft polymers with highly isotactic main chain in good yields, although the molecular weight distributions were broad. The graft polymer with main-chain MMA units obtained in the latter system exhibited melting endotherm due to stereocomplex formation between isotactic main chain and syndiotactic side chains.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
