Polar, Functionalized Diene-Based Materials. 4. Polymerization Studies of 2,3-Bis(4-ethoxy-4-oxobutyl)-1,3-butadiene and Copolymerization with Styrene

Autor:	Valerie V. Sheares, Melissa K. Rath, Matt D. Beery
Rok vydání:	2000
Předmět:	Polymers and Plastics Bulk polymerization Diene Organic Chemistry Radical polymerization 1 3-Butadiene Chain transfer Styrene Inorganic Chemistry chemistry.chemical_compound chemistry Polymerization Polymer chemistry Materials Chemistry Copolymer
Zdroj:	Macromolecules. 34:2469-2475
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma001491a
Popis:	New ester and acid functionalized diene-based polymers were successfully synthesized by bulk and solution homopolymerizations and copolymerizations with styrene. The ester-containing diene chosen, 2,3-bis(4-ethoxy-4-oxobutyl)-1,3-butadiene, followed typical free-radical kinetics. For the bulk polymerizations, number-average molecular weights of 13 × 103−80 × 103 g/mol and polydispersities of 2.0−4.0 were seen. Solution polymerizations did not exhibit a chain transfer to solvent effect, but rather showed a dependence on chain transfer to monomer, with the highest molecular weight of 96 × 103 g/mol obtained in cumene. Copolymerizations with styrene led to random copolymers, with the expected increase in the glass transition temperature as the styrene concentration increased. Functional modification of the homopolymer from a diester to a diacid was obtained in quantitative yields via saponification in tetrahydrofuran and water. This modification elevated the glass transition temperature of the polymer from −...
Databáze:	OpenAIRE
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