The microstructures of the hybrid core-shell latex synthesized by emulsion copolymerization of 3-trimethoxysilyl propyl methacrylate（MPS） and styrene were investigated.The polymers obtained under different operating...The microstructures of the hybrid core-shell latex synthesized by emulsion copolymerization of 3-trimethoxysilyl propyl methacrylate（MPS） and styrene were investigated.The polymers obtained under different operating conditions were characterized by（）29Si solid state NMR,FTIR,DSC and elemental analysis.It was found that under a neutral condition all of the MPS monomers were copolymerized into the polymer chain,small part of SiOR groups were hydrolyzed into SiOH groups and crosslinked by hydrogen bonds,the content of crosslinking is increased by MPS addition amount.Under basic condition,part of MPS were hydrolyzed and condensed into oligomers firstly,then these resultants were grafted into the polymer chain as pendent chain by both free radical polymerization and hydrolysis-condensation reaction.And under acidic condition,MPS in the system was easily hydrolyized and acted as crosslinker so that the emulsion became gels rapidly.展开更多
文摘The microstructures of the hybrid core-shell latex synthesized by emulsion copolymerization of 3-trimethoxysilyl propyl methacrylate（MPS） and styrene were investigated.The polymers obtained under different operating conditions were characterized by（）29Si solid state NMR,FTIR,DSC and elemental analysis.It was found that under a neutral condition all of the MPS monomers were copolymerized into the polymer chain,small part of SiOR groups were hydrolyzed into SiOH groups and crosslinked by hydrogen bonds,the content of crosslinking is increased by MPS addition amount.Under basic condition,part of MPS were hydrolyzed and condensed into oligomers firstly,then these resultants were grafted into the polymer chain as pendent chain by both free radical polymerization and hydrolysis-condensation reaction.And under acidic condition,MPS in the system was easily hydrolyized and acted as crosslinker so that the emulsion became gels rapidly.
