کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9783042 1511868 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of epoxide equivalent on microstructure of epoxy/rectorite nanocomposite studied by positrons
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Effect of epoxide equivalent on microstructure of epoxy/rectorite nanocomposite studied by positrons
چکیده انگلیسی
The epoxy/rectorite nanocomposites with different epoxide equivalent ranging from 188 to 1110 were prepared and the effects of epoxide equivalent on microstructure of materials were studied by X-ray diffraction (XRD) and positron annihilation lifetime spectroscope (PALS). In nanocomposites, the formation of exfoliated structure was observed from XRD pattern at epoxide equivalent >263. The PALS measurements reveal that the fractional free volume in nanocomposites was strongly affected by epoxide equivalent, in particular, the free-volume concentration was dramatically decreased with the increasing epoxide equivalent from 188 to 263, and the S parameter indicates the rectorite structure change and the high sensitivity of positron annihilation to the entry of rectorite into epoxy. These results indicate that positron annihilation characteristics are useful for study the microstructure of epoxy/rectorite nanocomposites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 92, Issues 2–3, 15 August 2005, Pages 361-365
نویسندگان
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