TY - JOUR
T1 - Poly(urethane-oxazolidone)
T2 - Synthesis, characterisation and shape memory properties
AU - Merline, J. Dyana
AU - Reghunadhan Nair, C. P.
AU - Gouri, C.
AU - Sadhana, R.
AU - Ninan, K. N.
N1 - Funding Information:
The authors acknowledge VSSC for granting permission to publish this paper. Thanks are due to IICT, Hydrabad for DMTA analysis. Ms. J.D. Merline thanks University Grants Commission, New Delhi for a research fellowship.
PY - 2007/8
Y1 - 2007/8
N2 - Poly(urethane-oxazolidone) were synthesized by reacting isocyanate-terminated oxazolidone with hydroxy-telechelic poly(tetramethylene oxide) (PTMO). The molar ratios of the reactants were varied to get polymers of varying oxazolidone and urethane compositons. The polymers were characterized by DSC, FTIR, XRD, dynamic mechanical thermal analysis and chemical analyses. An increase in the concentration of urethane and oxazolidone groups caused a decrease in tensile strength and elongation of the poly(urethane-oxazolidone). The polymers possessed crystallites of PTMO whose melting transition temperature decreased on enhancing the oxazolidone concentration. The polymers exhibited thermo-responsive shape memory properties, which was confirmed and quantified by cyclic tensile tests. The influence of oxazolidone modification and the consequent soft/hard segment variation on the thermal, mechanical, dynamic-mechanical and shape recovery properties of the resultant polymers was investigated. The oxazolidone moities conferred enhanced shape recovery and shape fixity to the polyurethane.
AB - Poly(urethane-oxazolidone) were synthesized by reacting isocyanate-terminated oxazolidone with hydroxy-telechelic poly(tetramethylene oxide) (PTMO). The molar ratios of the reactants were varied to get polymers of varying oxazolidone and urethane compositons. The polymers were characterized by DSC, FTIR, XRD, dynamic mechanical thermal analysis and chemical analyses. An increase in the concentration of urethane and oxazolidone groups caused a decrease in tensile strength and elongation of the poly(urethane-oxazolidone). The polymers possessed crystallites of PTMO whose melting transition temperature decreased on enhancing the oxazolidone concentration. The polymers exhibited thermo-responsive shape memory properties, which was confirmed and quantified by cyclic tensile tests. The influence of oxazolidone modification and the consequent soft/hard segment variation on the thermal, mechanical, dynamic-mechanical and shape recovery properties of the resultant polymers was investigated. The oxazolidone moities conferred enhanced shape recovery and shape fixity to the polyurethane.
KW - Cyclic tensile test
KW - Poly(urethane-oxazolidone)
KW - Shape fixity
KW - Shape memory polymer
KW - Shape recovery
KW - Smart polymers
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U2 - 10.1016/j.eurpolymj.2007.05.032
DO - 10.1016/j.eurpolymj.2007.05.032
M3 - Article
AN - SCOPUS:34547468485
SN - 0014-3057
VL - 43
SP - 3629
EP - 3637
JO - European Polymer Journal
JF - European Polymer Journal
IS - 8
ER -