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- W2064973681 abstract "Abstract Polyurethane (PU) networks based on hydrogenated hydroxytelechelic polyisoprene (HHTPI) and isophorone diisocyanate isocyanurate (IIPDI) were prepared and studied. Determination of the critical conversion point ( p c =0.58) was obtained experimentally through rheological measurements. This value was similar to the value predicted using the Macosko Miller model. Differential scanning calorimetry (DSC) analyses show that PUs with a high degree of phase separation is obtained (81% for [NCO]/[OH]=1). This phase segregation decreased when hard segment content increased. Glass transition temperature of the soft segment, T gs =−66 °C, was little affected by hard segment content. Thus, the resulting polyurethanes exhibit elastomeric properties. For [NCO]/[OH]>1 ratios, a second transition at 70 °C was observed and attributed to hard segment interactions. Using swelling measurements, the solubility parameter δ , polyurethane–THF interaction parameter ( χ ), crosslink densities ( ν e ) and the molecular weight between crosslinks ( M ¯ c ) were determined." @default.
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- W2064973681 date "2005-01-01" @default.
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- W2064973681 title "Hydrogenated hydroxy-terminated polyisoprene (HHTPI) based urethane network: network properties" @default.
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- W2064973681 doi "https://doi.org/10.1016/j.polymer.2004.11.027" @default.
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