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- W1500984589 abstract "Summary — Two series of poly(ester urethane) (PUR) elastomers, containing poly(e-caprolactone) diol of Mn = 2000 as soft segments were synthesized. In each series the same diisocyanate in hard segment, i.e., 1,6-hexamethylenediisocyanate was used in the same content. The PUR polymers were prepared in two-step polymerization in the absence of a catalyst; the molar ratio of OHpolyol / NCO / OHchain extender was 1/2/1. The chain extenders were 1,4-cyclohexane diol, 1,4-bis(hydroxymethyl)cyclohexane diol, glycerin or castor oil. The structures of all polymers were determined by FTIR, the physico-chemical and thermal properties were determined by differential scanning calorimetry and by thermogravimetry and additionally tensile properties were analyzed. Poly(ester urethane)s with 1,4-cyclohexane diol exhibited higher tensile strength (up to 16 MPa vs 13 MPa) and elongation at break (up to ~780 % vs. 600 %) in comparison with the corresponding poly(ester urethane)s based on 1,4-bis(hydroxymethyl)cyclohexane diol. A decrease in the chain length between crosslinking points was accompanied by an increase in thermal stability. Tensile strength can be attributed to a relatively" @default.
- W1500984589 created "2016-06-24" @default.
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- W1500984589 date "2010-02-01" @default.
- W1500984589 modified "2023-09-25" @default.
- W1500984589 title "Synthesis and properties of new polyurethane elastomers: influence of hard segment structure" @default.
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- W1500984589 doi "https://doi.org/10.14314/polimery.2010.111" @default.
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