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Reactive Blending of Nitrile Butadiene Rubber and In situ Synthesized Thermoplastic Polyurethane‐Urea: Novel Preparation Method and Characterization
Author(s) -
Tahir Muhammad,
Stöckelhuber Klaus Werner,
Mahmood Nasir,
Komber Hartmut,
Heinrich Gert
Publication year - 2015
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201400298
Subject(s) - materials science , prepolymer , nitrile rubber , polyurethane , composite material , natural rubber , nitrile , ultimate tensile strength , thermoplastic polyurethane , thermoplastic , acrylonitrile , thermoplastic elastomer , elastomer , polymer chemistry , polymer , copolymer , organic chemistry , chemistry
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 1 H 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.