کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1584408 1514903 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Processing and characterization of polyethylene/Brazilian clay nanocomposites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Processing and characterization of polyethylene/Brazilian clay nanocomposites
چکیده انگلیسی

Nanocomposites containing polyethylene (PE) and montmorillonite clay organically modified (OMMT) with quaternary ammonium salts were obtained via direct melt intercalation. A montmorillonite sample from the Brazilian state of Paraíba was treated with four different types of quaternary ammonium salts. After the treatment, the powder was characterized by X-ray diffraction and scanning electron microscopy. The dispersion and morphologies of OMMT within PE were investigated by X-ray diffraction and transmission electron microscopy. The results revealed the formation of intercalated montmorillonite layers in the PE matrix. The thermal stability and flammability of the PE/montmorillonite clay nanocomposites were measured by thermogravimetry and horizontal burning tests for HB classification, Underwrites Laboratories (UL 94), respectively. It was shown that the samples do not degrade at the processing temperature. By adding only 3 wt.% montmorillonite, the burning rate of the nanocomposites was reduced by 17%, and, in general, the tensile test showed that the yield strength and modulus of the nanocomposites are close to the pure PE. However, for a selected salt for MMT treatment the mechanical properties of nanocomposites were improved.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 445–446, 15 February 2007, Pages 141–147
نویسندگان
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