کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7215163 | 1469502 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Segmental dynamics and rheology of miscible poly(vinylidene fluoride)/poly(methyl methacrylate) (70/30 by weight) blend filled with titania or poly(methyl methacrylate)-grafted titania
ترجمه فارسی عنوان
پویایی و رئولاسیون نسبی پلی وینیلیدین فلوراید مخلوط / پلی (متیل متاکریلات) (70/30 درصد وزنی) مخلوط پر از تیتانیوم یا پلی (متیل متاکریلات)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
Titania (TiO2) or poly (methyl methacrylate) (PMMA)-grafted titania (TiO2-g-PMMA) were incorporated into miscible poly (vinylidene fluoride) (PVDF)/PMMA (70/30 by weight) blend by melt mixing. TiO2 particles exhibited aggregation in the composites as displayed by scanning electron microscopy observations and the storage modulus (Gâ²) plateau in the low frequency (Ï) region. This is accompanied with the restriction of molecular mobility and the elevation of glass transition temperature (Tg). Conversely, TiO2-g-PMMA nanoparticles with well-defined cross-linked PMMA shells of 5 nm in thickness are well-distributed in the matrix, without the influence on Tg and the appearance of low-Ï plateau. The dispersion of TiO2 is not stable during the thermal annealing of the composite in the melt while the TiO2-g-PMMA nanoparticles demonstrate excellent dispersion stability. Broadband dielectric spectroscopies indicate that TiO2 influenced the molecular relaxations of αa and αc, while the effect of TiO2-g-PMMA was negligible. Furthermore, the core-shell structured TiO2-g-PMMA nanoparticles produced considerable smaller interfacial polarization than TiO2 in the composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 123, 8 February 2016, Pages 39-48
Journal: Composites Science and Technology - Volume 123, 8 February 2016, Pages 39-48
نویسندگان
Yunxiang Zhang, Min Zuo, Ting Liu, Yihu Song, Qiang Zheng,