The Use of Interfacial Blend to Increase the Adhesion Properties of Natural Rubber/Polyvinylalcohol Multilayer Using Electron Beam Irradiation |
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Authors: | H H El-Nahas M M Magida |
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Institution: | (1) National Center for Radiation Research and Technology, P.O. Box 29, Nasr City, Cairo, Egypt; |
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Abstract: | Multilayers of natural rubber (NR) and polyvinylalcohol (PVA) were processed by casting natural rubber latex (NRL) then PVA
with varying layer thickness. Adhesion between NR and PVA was found to be very poor, as determined with the peel method. The
films of interfacial blend were composed of NRL and PVA having different ratios as a layer between NR/PVA layer, possessing
good adhesion and exhibited one mechanical phase in tensile-elongation at break tests. The result of adhesion was confirmed
by thermogravimetric analysis and scanning electron microscopy study. Also, adhesion was too strong for delamination at the
interface when the unit of three layers NR/blend/PVA was irradiated at 25 kGy. To probe the effect of the adhesion difference
on mechanical behavior and deformation of NR/blend/PVA layers at dry and wet conditions, the peel strength was examined as
a function of layer thickness and aging time. The results indicated that the interfacial blend, irradiation process and film
thickness were the key parameters affecting adhesion of NR/PVA layer. |
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