Influence of varying hard segments on the properties of chemically crosslinked moisture‐cured polyurethane‐urea
作者： DK Chattopadhyay , B Sreedhar , KVSN Raju , None
DOI: 10.1002/POLB.20586
关键词:
摘要: Polyurethane prepolymers are widely used in the reactive hot melt adhesives and moisture-cured coatings. The chemically crosslinked formulation based on PEG-1000 isophorone diisocyanate was prepared with NCO/OH ratio of 1.6:1.0. Trimethylol propane as a crosslinking agent. excess isocyanate prepolymer chain extended 2:1 (NCO/OH) different aliphatic diols, 4:1 aromatic diamines. polymer network maturation during moisture cure followed by dynamic mechanical thermal analyzer (DMTA) instrument. properties polymers were evaluated using thermogravimetric analysis, differential scanning calorimetric analysis DMTA. Surface through angle-resolved X-ray photoelectron spectroscopy. The present article discusses physical polyurethane-urea (MCPU) containing chemical crosslinks hard segment. complete showed amorous results toward room temperature modulus, tensile strength, hardness, stability, transparency. surface enrichment soft segments. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Phys 44: 102–118, 2006
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