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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله

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
Journal: Ultrasonics Sonochemistry - Volume 15, Issue 4, April 2008, Pages 320-325
نویسندگان
Ya Cao, Yuanyuan Zheng, Guangqin Pan,