Abstract
The effect of polyester oligoethylene adipate molecular weight, diisocyanate structure, and chain extender on the properties of epoxyurethane-based oligomer elastomers was studied in this research. Oligoethylene adipates were obtained via polycondensation of adipic acid and ethylene glycol. Epoxyurethane oligomers were synthesized according to a two-step route with an oligodiisocyanate as an intermediate product. The elastomers with hard urethane hydroxyl blocks were synthesized from oligodiisocyanates. The deformation and strength properties of the elastomers were studied.
Highlights
Urethane-containing elastomers (UCEs) constitute a unique series of block copolymers with the structure and properties that can be modified within a wide range [1]
Oligodiol reacts with a double excess of diisocyanate to form an isocyanate terminal compound-oligodiisocyanate. These products react with chain extenders, amines or alcohols, to form polyurethane ureas (SPUM) or polyurethanes (SPU)
When the flo on and the reactor was purged with nitrogen at a supply rate of 0.5 L/min, the rate of distillate noticeably decreased, the catalyst, tetrabutoxytitanium (C4H9O)4Ti, w supply rate was reduced to 0.1–0.3 L/min
Summary
Urethane-containing elastomers (UCEs) constitute a unique series of block copolymers with the structure and properties that can be modified within a wide range [1]. Addition, the domains hydrogen bonds play a crucial role in stabilization of the hard phase when using polyester oligomer, biocompatible and biodegradable polymers can be ob- structure. This case, the structure of the hard segments can affect the structural organization of the tained [18,19]. Three polyby semi-crystalline structure and hydrophobicity [18], ethylene can be used for esters of differentcharacterized molecular weights were synthesized from adipic acid and preparation of used biodegradable polymersof glycol These polyesters were for preparation six epoxy terminated oligomers. The present study was aimed at the synthesis and characterization of a number of The oligomer curing takes place due to epoxy ring opening with amines, extra hydroxyl biodegradable polyurethane elastomers with high oil and petrol resistance. Materials and Methods groups, was considered to be the main condition of high hydrophilicity and hydrolysis rate of resulting elastomers
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