Nitroxide-mediated free-radical copolymerization of styrene with butyl acrylate

Autor:	Enrique López Madruga, Vanesa Bordegé, Maria Carmen Fernández-Monreal, Marta Fernández-García, Rocío Cuervo-Rodríguez
Rok vydání:	2004
Předmět:	Nitroxide mediated radical polymerization Polymers and Plastics Chemistry Butyl acrylate Organic Chemistry Degree of polymerization Styrene chemistry.chemical_compound Monomer Polymer chemistry Materials Chemistry Copolymer Living polymerization Reactivity (chemistry)
Zdroj:	Journal of Polymer Science Part A: Polymer Chemistry. 42:4168-4176
ISSN:	0887-624X
DOI:	10.1002/pola.20183
Popis:	Controlled free-radical copolymerization of styrene (S) and butyl acrylate (BA) was achieved by using a second-generation nitroxide, N-tert-butyl-N-[1-diethylphosphono-(2,2-dimethylpropyl)] nitroxide (DEPN), and 2,2-azobisisobutyronitrile (AIBN) at 120 °C. The time-conversion first-order plot was linear, and the number-average molecular weight increased in direct proportion to the ratio of monomer conversion to the initial concentration, providing copolymers with low polydispersity. The monomer reactivity ratios obtained were rS = 0.74 and rBA = 0.29, respectively. To analyze the convenience of applying the Mayo–Lewis terminal model, the cumulative copolymer composition against conversion and the individual conversion of each monomer as a function of copolymerization time were studied. The theoretical values of the propagating radical concentration ratio were also examined to investigate the copolymerization rate behavior. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 4168–4176, 2004
Databáze:	OpenAIRE
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