کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5206251 | 1502955 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal, viscoelastic and mechanical behavior of polypropylene with synthetic boehmite alumina nanoparticles
ترجمه فارسی عنوان
رفتار حرارتی، ویسکوزیته و مکانیکی پلی پروپیلن با نانوذرات آلومینای بومیت مصنوعی
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کلمات کلیدی
نانوکامپوزیت، بومیت آلومینا، مرفولوژی، خواص حرارتی، ویژگی های مکانیکی، مقاومت کششی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Effects of nanofiller concentration and surface treatment on the morphology, thermal, viscoelastic and mechanical behavior of polypropylene copolymer (PP)/boehmite alumina (BA) nanocomposites were investigated. Both untreated BA particles and those treated with octylsilane (OS) or sulphonic acid compound (OS2) were added at up to 10Â wt% to produce nanocomposites by melt mixing followed by film blow molding and hot pressing. Dispersion of BA was studied by scanning electron microscopy. Differential scanning calorimetry and wide-angle X-ray scattering were adopted to detect changes in the crystalline structure of PP. Thermooxidative degradation of the nanocomposites was assessed by thermogravimetrical analysis. Dynamic mechanical analysis served for studying the viscoelastic properties, whereas quasi-static tensile, creep and Elmendorf tear tests were used to detect changes in the mechanical performance. BA nanoparticles were finely dispersed in PP up to 10Â wt%, even when they were not surface modified. The resistance to thermal degradation was markedly improved by BA nanomodification. Since the crystalline characteristics of the PP matrix did not practically change with BA modification, changes observed in the mechanical properties were attributed to BA dispersion, filler/matrix interactions and related effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 35, May 2014, Pages 92-100
Journal: Polymer Testing - Volume 35, May 2014, Pages 92-100
نویسندگان
D. Pedrazzoli, V.M. Khumalo, J. Karger-Kocsis, A. Pegoretti,