کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
672753 | 1459452 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kinetics of isothermal miniemulsion polymerization of 1,6-hexanediol diacrylate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
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چکیده انگلیسی
Kinetics of miniemulsion polymerization of 1,6-hexanediol diacrylate (HDDA) was investigated. The particle size of microgel particles remained relatively constant (ca. 270 nm) during polymerization in the temperature range 65-75 °C. The model-fitting method in combination with the model-free method was used to determine the relevant kinetic parameters. The droplet nucleation involved in the miniemulsion polymerization process was satisfactorily predicted by the nucleation Avrami-Erofeyev model {g(α) = [âln(1 â α)]1/2}. The overall activation energy (E = ca. 75 kJ molâ1) determined by the model-fitting and model-free methods is quite close to the overall activation energy (ca. 80 kJ molâ1) for polymerization initiated by a thermal initiator. By contrast, the conventional model [g(α) = â1/2ln(1 â α)] was incapable of adequately predicting the polymerization kinetic data. The miniemulsion polymerization was characterized by DSC, DLS and TEM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 634, 20 June 2016, Pages 31-37
Journal: Thermochimica Acta - Volume 634, 20 June 2016, Pages 31-37
نویسندگان
Quoc-Thai Pham, Ming-Chin Hsu, Chorng-Shyan Chern,