کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
821436 906759 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Specific rheological and electrical features of carbon nanotube dispersions in an epoxy matrix
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Specific rheological and electrical features of carbon nanotube dispersions in an epoxy matrix
چکیده انگلیسی

The rheological analysis of epoxy pre-polymer/MWCNT dispersions indicates that a physical network is formed. This is destroyed with an imposed shear, giving a viscoplastic and shear thinning behavior. Such destruction is not reflected in dynamic viscoelastic experiments, due to the very rapid recovery of the MWCNT network in the pre-polymer matrix. This responds to the observed lower electrical than rheological percolation threshold. Electrical conductivity results fulfill electron hopping/tunnelling mechanism, which implies a tube–tube distance close to 5 nm. However, rheological percolation requires nanotubes should touch each other, since no polymer chains are implied in the network.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 70, Issue 5, May 2010, Pages 879–884
نویسندگان
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