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Evidence of Branching in Poly(butyl acrylate) Produced in Pulsed‐Laser Polymerization Experiments
Author(s) -
Plessis Christophe,
Arzamendi Gurutze,
Alberdi Juan M.,
van Herk Alex M.,
Leiza José R.,
Asua José M.
Publication year - 2003
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200390030
Subject(s) - arrhenius plot , branching (polymer chemistry) , arrhenius equation , activation energy , materials science , polymerization , pulsed laser , polymer chemistry , acrylate , laser , thermodynamics , analytical chemistry (journal) , chemistry , polymer , composite material , monomer , organic chemistry , optics , physics
Branched poly(butyl acrylate) was obtained from pulsed‐laser polymerizations carried out in bulk and in solution between −16 and 60 °C. The predominantly short branches are formed by backbiting. The Arrhenius temperature dependence of the backbiting rate is calculated, and the activation energy of this process was found to be remarkably higher than that of propagation. Branching thus increases with temperature leading to broader SEC traces and difficulties in the accurate determination of k p .Arrhenius plot of k fp2 versus 1/ T determined experimentally.