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Authors
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Tahir, M. ; Stöckelhuber, K.W. ; Mahmood, N. ; Komber, H. ; Heinrich, G.
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Title
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Reactive blending of nitrile butadiene rubber and in situ synthesized thermoplastic polyurethane-urea: Novel prepatation method and characterization
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Date
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01.02.2015
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Number
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44542
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Abstract
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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 to PUU in NBR/PUU blends. The incorporation of PUU improves the tensile characteristic, tear and abrasion resistance however a temperature dependent softening of amorphous PUU phase diminishes the dynamic-mechanical behavior of blend vulcanizates. Improvement in physical properties of blends is attributed to good interfacial adhesion between dispersed PUU domains and continuous NBR matrix as seen by TEM.
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Publisher
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Macromolecular Materials and Engineering
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Wikidata
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Citation
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Macromolecular Materials and Engineering 300 (2015) 242-250
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DOI
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https://doi.org/10.1002/mame.201400298
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