Modifications induced in natural rubber due to vinylacetate versatic ester copolymer blend concentration and gamma radia
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Modifications induced in natural rubber due to vinylacetate versatic ester copolymer blend concentration and gamma radiation M. M. Magida1 · A. Abou Elfadl2,3 · S. A. Nouh2,4 Received: 7 March 2019 / Revised: 22 September 2019 / Accepted: 17 December 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract Thermoplastic elastomers from blends of natural rubber latex NRL and vinylacetate versatic ester copolymer latex VAcVe as a hydrophobic/hydrophilic blend have been prepared by the solution casting technique. The polymer blend was characterized using different characterization techniques such as thermogravimetric analysis, Fourier transform infrared and UV–Vis spectroscopy. The effects of VAcVe blend concentration on the thermal, structural, optical and mechanical properties of the NRL have been studied. The results reveal that the increase in VACVe content led to a more compact structure of the NRL/VAcVe polymer blends resulted in an increase in the disorder in the NRL/VAcVe blends. Further, the effect of gamma radiation on the (50% NRL/50% VAcVe) polymer blend has been studied. Samples from the (50% NRL/50% VAcVe) blend were irradiated with gamma doses of 10 and 30 kGy. It is found that the gamma irradiation leads to the dominance of degradation. In addition, the color changes in the irradiated samples were studied. Keywords Blend · Gamma · TGA · FTIR · Mechanical · Optical properties
Introduction The field of polymer blend has attracted strong interest in today’s materials research, as it is possible to achieve impressive enhancements of material properties when compared with the pure polymers [13]. In other words, it provides a * S. A. Nouh [email protected] 1
Department of Radiation Chemistry, National Center for Radiation Research and Technology, Nasr City, Cairo, Egypt
2
Physics Department, Faculty of Science, Taibah University, Medina, Saudi Arabia
3
Physics Department, Faculty of Science, Fayoum University, Fayoum, Egypt
4
Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt
13
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Polymer Bulletin
powerful route to establish new properties in materials that are superior to that of each individual component polymer [14]. The main advantages of the polymer blend systems are the simplicity of preparation and the ease of control of physical properties by compositional changes [16]. However, the miscibility between the constituents of a polymer mixture on the molecular scale is responsible for material with superior properties [19]. Miscibility may arise from specific interactions, such as dipole–dipole forces and charge transfer complexes for homopolymer mixtures or segment–segment repulsion inside the blends [9]. Thermoplastic elastomer (TPE) blends are a relatively new class of polymer that are processable as a melt at elevated temperature but exhibit properties similar to a vulcanized elastomer. Vinyl acetate versatic ester copolymer (VAcVe) latex having higher bond strength and better film properties has grown considerably in t
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