کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5189747 1381191 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of clay on the morphology and properties of PMMA/poly(styrene-co-acrylonitrile)/clay nanocomposites prepared by melt mixing
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Effect of clay on the morphology and properties of PMMA/poly(styrene-co-acrylonitrile)/clay nanocomposites prepared by melt mixing
چکیده انگلیسی
Nanocomposites of blends of polymethylmethacrylate (PMMA) and poly(styrene-co-acrylonitrile) (SAN) with natural and organically modified montmorillonite clays (Cloisite®25A and Cloisite®15A) were prepared by melt mixing in a twin-screw extruder and the effect of clay on the phase separation morphology and physical properties of nanocomposites was investigated. Multi-pass samples were; those extruded once (one-pass), twice (two-pass) and three times (three-pass). Dispersion of clays in the matrix polymers was investigated using XRD and TEM. Interestingly enough, the clays were observed to be mainly located at the boundaries of PMMA and SAN for most of the nanocomposites. As the number of pass increased, the phase-separated domain size became larger for nanocomposites of PMMA/SAN containing PM, while nanocomposites with clay 25A or 15A showed less degree of growth in domain size in the TEM pictures. Viscosities of the continuous phase and separated domains, and the compatibilizing effect of clays were discussed as the probable explanations for these observations. These were supported by the rheological properties measurements, where the nanocomposites with clay 25A or 15A showed the higher complex viscosities than those of PM and also showed some shear thinning behavior. DSC and TGA analyses were also conducted.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 12, 31 May 2006, Pages 4359-4369
نویسندگان
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