کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10638177 | 995407 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improvements on the synthesis and properties of fluorinated polyimide-clay nanocomposites by using double-swelling agents
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Improvements on the synthesis and properties of fluorinated polyimide-clay nanocomposites by using double-swelling agents Improvements on the synthesis and properties of fluorinated polyimide-clay nanocomposites by using double-swelling agents](/preview/png/10638177.png)
چکیده انگلیسی
Polyimide (6FBpA-6FDA)-montmorillonite nanocomposites (PiCN) were synthesized from modified montmorillonite (MMT) and poly(amic acid), using single- and double-swelling agents. The silicate layers of clay in the matrix of 6FBpA-6FDA were intercalated and became more exfoliated when double (DAETPB-ODA) swelling agents were used to modify the montmorillonite. Structures of exfoliation were confirmed by wide-angle X-ray diffraction (WAXRD) and transmission electron microscopy (TEM). The improved exfoliation of nanocomposites by the double-swelling agents resulted in enhanced thermal and mechanical properties. In particular, the maximum increase in Td, Tg, and storage modulus of these nanocomposites was found to be those with addition of 5.0 wt% DAETPB-ODA modified-MMT. The moisture absorption of these nanocomposites was also reduced by the addition of double-swelling agent-modified MMT. The dielectric properties of PiCN in the form of film with MMT loading from 1.0 to 5.0 wt% were measured under frequencies of 100 Hz-1 MHz at 35-150 °C. Reduced dielectric constants were observed for these fluorinated polyimide-clay nanocomposites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 94, Issue 1, 15 November 2005, Pages 42-51
Journal: Materials Chemistry and Physics - Volume 94, Issue 1, 15 November 2005, Pages 42-51
نویسندگان
Hong-Wen Wang, Rui-Xuan Dong, Hsuan-Chih Chu, Kung-Chin Chang, Wan-Chia Lee,