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Blends of nitrile butadiene rubber (NBR) and in‐situ synthesized thermoplastic polyurethane‐urea (PUU) are prepared by a reactive blending method. The PUU is synthesized in‐situ from the polyaddition of 4,4′‐diphenylmethane diisocyanate‐terminated prepolymer with Bisaniline‐M during blending with NBR in an internal mixer. The 1H NMR spectroscopic analysis shows up to 93% conversion of Bisaniline‐M...
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