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By: Saurabh K. Tiwari and Virendra Kumar Gupta
Saurabh K. Tiwari1*, Virendrakumar Gupta1
1. Deputy General Manager, Department of Polymer Synthesis & Catalysis, Reliance Research and Development Centre, Reliance Industries Limited, Navi Mumbai-400701, India
1. Senior Vice President, Polymer Synthesis & Catalysis, Reliance Research and Development Centre, Reliance Industries Limited, Navi Mumbai-400701, India
Reactive bromobutyl rubber and its modification have been studied in detail. These reactive bromobutyl rubber was converted to ammonium and phosphonium functionalized bromobutyl rubber using triphenyl phosphine (PPh3) and 4-Dimethylaminopyridine (4-DMAP). Mechanical properties of synthesized ionomers are found comparative with butyl rubber. Pharma stopper was made from synthesized phosphonium ionomer that may be useful for pharma industries due to its self-healing characteristics which can help to preserve the properties of drugs that are sensitive in nature. Polypropylene impact copolymer and phosphonium ionomer based bromobutyl rubber blend shows improved impact strength with the addition of 10 wt % phosphonium ionomer. The improvement in impact strength shows the suitability for automotive applications like auto bumpers and other applications. Ammonium bromobutyl ionomer was also made using DMAP nucleophile shows potential application for elastomeric fibers etc. This study presents the synthesis and characterization of brominated poly(isobutylene-co-isoprene) ionomers, focusing on phosphonium and ammonium functionalized derivatives. The phosphonium ionomer, synthesized using triphenyl phosphine, exhibits self-healing properties and enhanced adhesion, making it suitable for pharmaceutical stoppers and automotive impact modifiers. Ammonium ionomer, prepared with 4-Dimethylaminopyridine (4-DMAP), demonstrates potential for elastomeric fiber applications. Polypropylene blends with phosphonium ionomer show significant improvements in impact strength, highlighting their utility in automotive components. The study underscores the promising mechanical and functional properties of these novel ionomers for diverse industrial applications.
Citation:
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