The reactive compatibilization of NBR/EVA blends with oxazoline-modified nitrile rubber
| Autor: | Pedro Ivo C. Guimarães, Bluma G. Soares, Mauricio S. M. Almeida |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Polymers and Plastics Scanning electron microscope Organic Chemistry Vulcanization General Physics and Astronomy Concentration effect Oxazoline law.invention chemistry.chemical_compound Chemical engineering chemistry law Polymer chemistry Ultimate tensile strength Materials Chemistry Copolymer Polymer blend Nitrile rubber |
| Zdroj: | European Polymer Journal. 40:2185-2194 |
| ISSN: | 0014-3057 |
| DOI: | 10.1016/j.eurpolymj.2004.04.006 |
| Popis: | The reactive compatibilization of ethylene-vinyl acetate copolymer (EVA)/nitrile rubber (NBR) blends has been performed using partially hydrolyzed EVA (EVALVA) in combination with oxazoline-functionalized NBR (NBROX). The synthesis of the NBROX has been performed in solution. The presence of 5 wt% of EVALVA in combination with 2.5 wt% of NBROX resulted in a substantial improvement of tensile strength of NBR/EVA (50:50 wt%) vulcanized blends, with a little increase of the elongation at break. The morphologies of these blends were examined by the scanning electron microscopy. A finer morphology has been observed in vulcanized and non-vulcanized blends, compatibilized with the co-reactive EVALVA/NBROX copolymers. Blends of NBROX/EVALVA (50:50 wt%) resulted in insoluble material, constituted by both components, as indicated by Fourier transform infrared analysis. This result indicates the reaction of the co-reactive groups (hydroxyl and oxazoline) during blending. |
| Databáze: | OpenAIRE |
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