Study on thermal property of Polyurethane-Urea elastomers prepared with different dianiline chain extenders
Publish place: 07th International Congress on Chemical Engineering
Publish Year: 1390
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ICHEC07_532
تاریخ نمایه سازی: 25 فروردین 1394
Abstract:
A number of polyurethane prepolymers based on polycaprolactone diol (CAPA),and 4,4'-diphenyl methane diisocyanate(MDI)were synthesized and extended with different dianilines such as: 4,4`-Methylenebis(2,6-diisopropylaniline) (M-DIPA ), 4,4'-Methylenebis(2-isopropyl-6-methylaniline) (M-MIPA),4,4`-Methylenebis(2,6-diethylaniline) (M-DEA),and 4,4`-Methylenebis(3-chloro-2,6-diethylaniline) ( M- CDEA).A method of using high melting point chain extenders in the synthesis of castable polyurethane Elastomer was applied in which the high melting point chain extenders was first dissolved in DMF before mixing with prepolymer. Using this method it was found possible to carry out a bulk polymerization in the normal PU reaction temperature range of 80-100C.IR spectroscopy was used to check the end of polymerization reaction and polymer characterization .Thermal properties were measured by means of DMTA, TGA and DSC and The effect of dianiline structure on the thermal properties of the cast films were studied and compared. It was found that the Thermal properties and thermal stabilitiesare affected by variation of dianiline molecular structure.
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Authors
majid barikani
Department of Polymer Engineering, Science and Research branch, Islamic Azad University, Tehran, Iran Young Research Club, Science and Research branch, Islamic Azad University, Tehran, Iran
naghmeh fazeli
Department of Polymer Engineering, Science and Research branch, Islamic Azad University, Tehran, Iran
mehdi barikani
Iran Polymer and Petrochemical Institute,P.O.Box۱۴۹۶۵/۱۱۵,Tehran ,Iran
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