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Production of Copolymers in a Tubular Reactors Through Nitroxide Mediated Controlled Free‐ R adical Polymerization
Author(s) -
Araujo Carolina L.,
Pinto José Carlos
Publication year - 2013
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201300080
Subject(s) - copolymer , nitroxide mediated radical polymerization , methyl methacrylate , polymer chemistry , monomer , styrene , toluene , polymerization , materials science , radical polymerization , chemistry , polymer , organic chemistry
Summary This work presents experimental results for styrene / methyl methacrylate (MMA) copolymerizations performed in a tubular reactor equipped with lateral feed lines through the nitroxide mediated controlled free‐radical mechanism. Reactions were carried out in solution with a primary feed containing a mixture of styrene, toluene, initiators and TEMPO (2,2,6,6‐tetramethyl‐1‐piperidinoxyl) and a lateral feed containing a mixture of comonomers and TEMPO. The obtained results show that copolymers can be obtained with weight average molecular weights ranging from 30 × 10 3 to 60 × 10 3 g/gmol and polydispersities ranging from 1.3 to 1.6, with monomer conversions ranging from 20 to 70 wt%. When the average residence time is manipulated, it can be observed that the average molecular weights increase linearly with time, confirming the “living” character of the reaction system.