Thermal and Mechanical Behavior of New Transparent Thermoplastic Polyurethane Elastomers Derived from Cycloaliphatic Diisocyanate

• DOI: 10.3390/polym10050537
• Publication Date: 2018-05-17T07:49:29Z
• Authors: Andrzej Puszka
• Keywords: Thermoplastic polyurethane; Thermoplastic elastomer

New transparent thermoplastic polyurethane elastomers (TPURs) with the hard-segment content of ≈50 mass % were synthesized by one-step melt polyaddition 1,1'-methanediylbis(4-isocyanatocyclohexane), 2,2'-methylenebis[(4,1-phenylene)-methylenesulfanediyl]diethanol (diol E), 3-hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid (DMPA), a poly(oxytetramethylene) diol M ¯ n = 1000 g/mol (PTMO), or poly(hexametylene carbonate) 860 (PHCD). Herein, I prepared TPURs in which 20, 40, and 60 mol E was replaced DMPA, an ionic chain extender. The structure polymers examined ATR-FTIR. Their thermal mechanical behaviors determined means thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic (DMTA), tensile tests, Shore A/D hardness. optical properties are described. Generally, addition carboxyl groups to polymer resulted decreases their stability, transparency, refractive indexes. Furthermore, use different soft segments revealed significant differences both obtained.