کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1266597 972284 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Radical generation process studies of the cationic surfactants in ultrasonically irradiated emulsion polymerization
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Radical generation process studies of the cationic surfactants in ultrasonically irradiated emulsion polymerization
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 15, Issue 4, April 2008, Pages 320-325
نویسندگان
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