Synthesis and characterization of hyperbranched polymers via Cp2TiCl-catalyzed self-condensing vinyl polymerization using glycidyl methacrylate as inimer

✍ Scribed by Xiao-hui Liu; Zhong-min Dong; Xiu-lan Tang; Yue-sheng Li

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 493 KB
• Volume: 51
• Category: Article
• ISSN: 0032-3861
• DOI: 10.1016/j.polymer.2009.12.042

✦ Synopsis

Hyperbranched polymers were produced using glycidyl methacrylate (GMA)/Cp 2 TiCl 2 /Zn as selfcondensing vinyl polymerization (SCVP) system. The polymerization is firstly initiated by the epoxide radical ring opening catalyzed by Cp 2 Ti(III)Cl generated in situ via the reaction of Cp 2 TiCl 2 with Zn. By optimizing the molar ratio of the SCVP inimer (GMA) to the mediator (Cp 2 Ti(III)Cl), the active propagation chains are reversibly transformed to the dormant species and the cross-linking does not occur until a higher level of monomer conversion (ca. 80%). We detail this facile one-step polymerization technique to prepare highly branched polymers with a multiplicity of particular end reactive functionalities including Ti alkoxide, hydroxyl and vinyl functional groups, which differs from most previously reported SCVP systems.