Details

Autor(en) / Beteiligte

• Cuervo-Rodriguez, Rocio
• Fernández-Monreal, Carmen
• Madruga, Enrique López

Titel

Kinetic study of the stable free-radical copolymerization of styrene with butyl methacrylate

Ist Teil von

• Journal of polymer science. Part A, Polymer chemistry, 2002-08, Vol.40 (16), p.2750-2758

Ort / Verlag

New York: Wiley Subscription Services, Inc., A Wiley Company

Erscheinungsjahr

2002

Quelle

Wiley Online Library

Beschreibungen/Notizen

• The radical copolymerization of styrene and n‐butyl methacrylate mediated by 1‐phenyl‐1‐(2′,2′,6′,6′‐tetramethyl‐1′‐piperidinyl‐oxy)ethane in bulk at 125 °C has been analyzed over a wide range of conversions and monomer feed compositions. Monomer reactivity ratios have been determined, and the Mayo–Lewis terminal model provides excellent predictions for the variations of the intermolecular structure over the entire conversion range. The kinetic analysis of this copolymerization system indicates an apparent propagation rate coefficient independent of the monomer feed composition as well as a limiting conversion that decreases as the styrene monomer feed decreases. This fact is attributed to side reactions leading to unsaturated end groups and the accumulation of nonactive adducts of n‐butyl methacrylate. The number‐average molecular weights linearly increase with conversion, and the copolymers present narrow molecular weight distributions. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 2750–2758, 2002 The stable free‐radical copolymerization of styrene with n‐butyl methacrylate has been analyzed over a wide range of conversions and monomer feed compositions. The apparent propagation rate coefficients seem to be independent of the monomer feed composition, the number‐average molecular weights linearly increase with conversion, and the copolymers present narrow molecular weight distributions. The monomer reactivity ratios have also been determined.