کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5185943 1381091 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reaction-induced phase decomposition of thermoset/thermoplastic blends investigated by energy filtering transmission electron microscopy
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Reaction-induced phase decomposition of thermoset/thermoplastic blends investigated by energy filtering transmission electron microscopy
چکیده انگلیسی

Energy-filtering transmission electron microscopy (EFTEM) was employed to investigate the morphology developments of thermoset/thermoplastic blends of poly(2,6-dimethyl-1,4-phenylene ether)/bis(vinylphenyl) ethane, PPE/BVPE. Neither conventional TEM images nor energy-filtered images at any energy loss levels showed any evidences for the phase separation of the blends, while those could be shown and characterized by the oxygen maps representing the differences in the oxygen concentrations between the two phases, which could be characterized as the PPE-rich phase (oxygen-rich phase) and the BVPE-rich phase (oxygen-poor phase). The blends undergo phase decomposition into the two phases through the crosslinking reaction of BVPE. The effect of the composition and the curing time on the phase decomposition behaviors was investigated by quantitative analysis of EELS spectra acquired from the two phases. Reactive functional moiety was introduced onto PPE and the effect of the reaction between the two components on the phase decomposition behaviors was also investigated. We show the possibility of EFTEM for the investigation of the mechanism of reaction-induced phase separations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 48, Issue 13, 15 June 2007, Pages 3749-3758
نویسندگان
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