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Simultaneous Free‐Radical and Addition Miniemulsion Polymerization: Effect of the Chain Transfer Agent on the Microstructure of Polyurethane‐Acrylic Pressure‐Sensitive Adhesives
Author(s) -
Lopez Aitziber,
Reyes Yuri,
DegrandiContraires Elise,
Canetta Elisabetta,
Creton Costantino,
Keddie Joseph L.,
Asua José M.
Publication year - 2013
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201100390
Subject(s) - miniemulsion , materials science , microstructure , polymerization , adhesive , polyurethane , radical polymerization , chain transfer , polymer , polymer chemistry , composite material , chemical engineering , layer (electronics) , engineering
The effects of the CTA concentration on polymerization kinetics, polymer microstructure, particle morphology, and adhesive performance of waterborne hybrid PSAs prepared by simultaneous free‐radical and addition miniemulsion polymerizations are studied. The development of the microstructure is shown to differ from waterborne acrylic PSAs obtained by free‐radical polymerization because of the contribution of the addition reaction, which in turn causes marked differences in the adhesive performance of the final films. A computer simulation is developed to obtain detailed information about the microstructure of PU/acrylic hybrids and to correlate the microstructure with the final adhesive properties.