کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8021925 | 1517279 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low dielectric constant nanoporous silica/PMMA nanocomposites with improved thermal and mechanical properties
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
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چکیده انگلیسی
Periodic mesoporous organosilicas (PMOs) with 3D cubic framework and worm-hole framework, inorganic mesoporous silica with 3D cubic framework and organic-inorganic nanometer sized hollow spheres were synthesized with different molar ratios of 1,2-bis(triethoxysilyl)ethane (BTESE) and tetraethylorthosilicate (TEOS) as silica precursors, and were used to prepare nanoporous silica/poly(methyl methacrylate) (PMMA) nanocomposites with lower dielectric constant, higher thermal and mechanical properties. The micro-structures of above nanoporous silicas (NPSs) were retained in NPS/PMMA nanocomposites with 2 wt% loading of NPS. NPSs provided composites with lower dielectric constant (κâ2.73) in comparison to pure PMMA (κ=2.91) due to introduction of voids. All the composites exhibited improved mechanical properties, glass transmission temperature (Tg) and thermal stability in comparison to PMMA. The tensile strength, tensile modulus, flexural strength and flexural modulus of the composites increased with the molar percentage of BTESE increased from 0% to 100%, and only slight compromised elongation at break and impact strength were observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 109, 15 October 2013, Pages 158-162
Journal: Materials Letters - Volume 109, 15 October 2013, Pages 158-162
نویسندگان
Jian Jiao, lei Wang, Panpan Lv, Peng Liu, Yu Cai,