Synthesis and characterization of some polyurethanes and polyurethane-ureas
نویسنده
چکیده
Polyurethanes and polyurethane-ureas were prepared by the reaction of diethylene glycol and polyethylene glycol with excess of aromatic and aliphatic diisocyanate to yield isocyanate terminated prepolymers which were subsequently reacted with diols and diamines. These polymers were characterized by IR, 1HNMR spectra, viscosity measurements and thermogravimetric analysis.
منابع مشابه
Preparation and Evaluation of Blood Compatibility of Novel Epoxy-Modified Polyurethanes
In order to prepare polyurethane elastomers with acceptable physical properties and good biocompatibility, novel polyurethane networks were synthesized via curing reaction of epoxy-terminated polyurethane prepolymers (EUPs) with hexamethylene diamine. EUPs were prepared from reaction of glycidol with NCO-terminated polyurethanes (ITPs). ITPs were also synthesized from reaction of one equi...
متن کاملSynthesis and Characterization of Polyols from Refined Cooking Oil for Polyurethane Foam Formation Synthesis and Characterization of Polyols from Refined Cooking Oil for Polyurethane Foam Formation
Chemical Engineering, School of Engineering and Information Technology, Universiti Malaysia Sabah, UMS Road, 88400 Kota Kinabalu, Sabah, Malaysia *School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia **School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia ***Malaysian Institute Pharmaceutical & Nutraceutical, MOSTI...
متن کاملSynthesis and Characterization of Anionic Polyurethane Dispersants for Waterborne Paints
Anionic polyurethane dispersants APUDs were used as dispersing agents in formulation of waterborne paints. The APUDs were synthesized by three steps. In the first step, macromonomer diisocyanate having carboxylic acid was prepared by isophorone diisocyanate IPDI, dimethylol propionic acid DMPA in presence of acetone as solvent and dibutyltin dilaurate DBTDL as catalyst. Then, carboxylic polyure...
متن کاملPreparation and Characterization of Soybean Oil-Based Polyurethanes for Digital Doming Applications
Polyurethane-resin doming is currently one of the fastest growing markets in the field of industrial graphics and product identification. Semi-rigid bio-based polyurethanes were prepared deriving from soybean oil as a valuable alternative to fossil materials for digital doming and applied to digital mosaic technology. Bio-resins produced can favorably compete with the analogous fossil polymers,...
متن کاملبررسی اثر زنجیر افزایندهها در تغییر خواص فیزیکی، مکانیکی و انرژیزایی بایندرهای پلییورتانی گرمانرم
Polyurethanes are the most well known polymers used to make a binder in high energy material. Polyurethanes aregenerally synthesized by the reaction of diisocyanates and polyols and chain extender.These polymers are often two-phase morphology.Chain extenders are small diols or diamines that are inserted to the hard segment of of polyurethane chain. chemical structure of chain extender, the ...
متن کامل