کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9694211 | 1459642 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystallization kinetics and nucleation activity of filler in polypropylene/surface-treated SiO2 nanocomposites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Crystallization kinetics and nucleation activity of filler in polypropylene/surface-treated SiO2 nanocomposites Crystallization kinetics and nucleation activity of filler in polypropylene/surface-treated SiO2 nanocomposites](/preview/png/9694211.png)
چکیده انگلیسی
Isothermal and non-isothermal crystallization kinetics of polypropylene (PP)/surface-treated SiO2 nanocomposites were extensively studied. Analysis of the isothermal crystallization showed that the phenomenon is characterized by faster rates as the amount of silica is increased. In the case of non-isothermal crystallization, it was found that the Ozawa analysis was rather inapplicable for the nanocomposites. In contrast, the modified Avrami method, as well as the method proposed by Mo was applied giving satisfactory results. The effective energy barrier for non-isothermal crystallization was estimated as a function of the relative degree of crystallinity using the isoconversional analysis of calorimetric data. This was found to vary with the degree of conversion, as well as with the presence of filler. Finally, the nucleation activity of the silica nanoparticles on the polymer matrix was explored and it was proved that when the content of filler exceeds 7.5Â wt.% the nucleation is not drastically improved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 427, Issues 1â2, March 2005, Pages 117-128
Journal: Thermochimica Acta - Volume 427, Issues 1â2, March 2005, Pages 117-128
نویسندگان
George Z. Papageorgiou, Dimitris S. Achilias, Dimitris N. Bikiaris, George P. Karayannidis,