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Monodisperse, Temperature‐Sensitive Microgels Crosslinked by SiOSi Bonds
Author(s) -
Zhang JianTao,
Pan ChangJiang,
Keller Thomas,
Bhat Rahila,
Gottschaldt Michael,
Schubert Ulrich S.,
Jandt Klaus D.
Publication year - 2009
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.200900038
Subject(s) - comonomer , materials science , dispersity , siloxane , copolymer , hydrolysis , polymer chemistry , decomposition , chemical engineering , polymerization , precipitation , condensation , phase (matter) , precipitation polymerization , radical polymerization , organic chemistry , composite material , polymer , chemistry , thermodynamics , physics , meteorology , engineering
A series of novel temperature‐sensitive microgels were prepared through precipitation polymerization using MPTMS as the comonomer as well as the crosslinker. APS acted as the initiator to initiate the radical copolymerization of NIPAAm and MPTMS, at the same time, the acid environment resulting from the decomposition of APS catalyzed the hydrolysis/condensation of the siloxane groups to generate crosslinking points. The experimental results revealed that the microgels exhibited temperature sensitivity and the phase transition temperature was approximately 31 °C. An increase of SDS concentration or a decrease of MPTMS content resulted in a reduction of the final hydrodynamic diameters of the microgels.