Synthesis and characterization of cross-linked poly(esterurethane)s for elastomeric bearings

S. Oprea

Published : 2010-09-30

Vol. 55 No. 9 (2010)

Synthesis and characterization of cross-linked poly(esterurethane)s for elastomeric bearings

S. Oprea

Abstract

Cross-linked poly(esterurethane) elastomers (PEURs) have been synthesized in a two-step synthesis. In the first step poly(ethylene adipate) diol was reacted with 4,4'-diphenyl-methane diisocyanate, then the obtained prepolymers were chain extended with bifunctional precursor (1,3-propane diol or 1,5-pentane diol) chains and a trifunctional cross-linker (glycerine) at stoichiometric ratios, resulting in a series of cross-linked products with various hard segment (HS) of various structure and content. Their thermal and mechanical properties were determined. Due to phase separation and cross-linked hard segments, propane diol based polyurethane exhibited high mechanical properties. The replacement of propane diol with pentane diol had a negative effect on these mechanical properties. The described cross-linked PEURs possessed strain/shape recovery properties.

Keywords

polieterouretany ; elastomery ; sieciowanie ; właściwości mechaniczne ; właściwości cieplne ; naprężenie inicjujące ; powrót przekształceniowy poly(esterurethane)s ; cross-linking ; mechanical properties ; thermal behavior ; shearing stress deformation ; shape recovery

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Oprea, S. (2010). Synthesis and characterization of cross-linked poly(esterurethane)s for elastomeric bearings. Polimery, 55(9), 634-640. Retrieved from https://ichp.vot.pl/index.php/p/article/view/1048

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