Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1266597 | Ultrasonics Sonochemistry | 2008 | 6 Pages |
Abstract
Without any chemical initiators added, ultrasonically irradiated emulsion copolymerization of styrene and a cationic polymerizable surfactant (methacryloxyethyl dodecydimethyl ammonium bromide, C12N+) was successfully employed to prepare copolymer nanolatexes. Compared with the conventional ionic surfactants, C12N+ has much higher initiation efficiency and C12N+ system exhibits shorter induction period, much higher styrene conversions and polymerization rate Rp in short reaction time. A radical trapping experiment and gas chromatograph-mass spectrograph analysis proved that under ultrasonic irradiation, C12N+ undergoes bond scission between the two alkyl and ionic group, where both C-N bonds are weak along the chain, thereby producing much more original radicals to initiate the emulsion polymerization.
Related Topics
Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Ya Cao, Yuanyuan Zheng, Guangqin Pan,