Synthesis and properties of polydimethylsiloxane-containing block copolymers via living radical polymerization

Autor:	Ezat Khoshdel, Laurence Bes, Kim Huan, David M. Haddleton
Rok vydání:	2001
Předmět:	Telechelic polymer Polymers and Plastics Chemistry Organic Chemistry Radical polymerization Solution polymerization End-group chemistry.chemical_compound Polymerization Polymer chemistry Materials Chemistry Copolymer Living polymerization Methyl methacrylate
Zdroj:	Journal of Polymer Science Part A: Polymer Chemistry. 39:1833-1842
ISSN:	1099-0518 0887-624X
DOI:	10.1002/pola.1161
Popis:	Polydimethylsiloxane (PDMS) block copolymers were synthesized by using PDMS macroinitiators with copper-mediated living radical polymerization. Diamino PDMS led to initiators that gave ABA block copolymers, but there was low initiator efficiency and molecular weights are somewhat uncontrolled. The use of mono- and difunctional carbinol–hydroxyl functional initiators led to AB and ABA block copolymers with narrow polydispersity indices (PDIs) and controlled number-average molecular weights (Mn's). Polymerization with methyl methacrylate (MMA) and 2-dimethylaminoethyl methacrylate (DMAEMA) was discovered with a range of molecular weights produced. Polymerizations proceeded with excellent first-order kinetics indicative of living polymerization. ABA block copolymers with MMA were prepared with between 28 and 84 wt % poly(methyl methacrylate) with Mn's between 7.6 and 35 K (PDI
Databáze:	OpenAIRE
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