TY - JOUR
T1 - Synthesis, characterization, curing and shape memory properties of epoxy-polyether system
AU - Merline, J. Dyana
AU - Nair, C. P.Reghunadhan
AU - Ninan, K. N.
N1 - Funding Information:
The authors acknowledge VSSC for granting permission to publish this paper. Thanks are due to IICT, Hyderabad for DMTA analysis, Ms. J.D. Merline, and to the University Grants Commission, New Delhi for a research fellowship.
PY - 2008/4
Y1 - 2008/4
N2 - Epoxy resins were cured by an amine telechelic poly(tetramethylene oxide) (PTMO). The telechelic amine was synthesized from hydroxy telechelic PTMO and was characterized. The kinetics of curing of epoxy monomer by the polyether amine was studied in detail by differential scanning calorimetry (DSC) and rheology to optimize the cure conditions. The cured epoxy system exhibited shape memory properties where PTMO served as the switching segment. Molar ratios of the epoxy monomer and the amine were varied to get polymers with different compositions. The developed polymers were analyzed by DSC, X-ray diffraction, and Dynamic Mechanical Thermal (DMTA) analyses. Shape memory property was evaluated by bending tests. As the concentration of epoxy resin increased, the transition temperature (Ttrans) increased. The tensile strength and % elongation also increased with epoxy resin-content. The extent of shape recovery increased with PTMO-content with a minor penalty in recovery time. The polymer with the maximum PTMO-content exhibited 99% shape recovery with a recovering time of 12s.
AB - Epoxy resins were cured by an amine telechelic poly(tetramethylene oxide) (PTMO). The telechelic amine was synthesized from hydroxy telechelic PTMO and was characterized. The kinetics of curing of epoxy monomer by the polyether amine was studied in detail by differential scanning calorimetry (DSC) and rheology to optimize the cure conditions. The cured epoxy system exhibited shape memory properties where PTMO served as the switching segment. Molar ratios of the epoxy monomer and the amine were varied to get polymers with different compositions. The developed polymers were analyzed by DSC, X-ray diffraction, and Dynamic Mechanical Thermal (DMTA) analyses. Shape memory property was evaluated by bending tests. As the concentration of epoxy resin increased, the transition temperature (Ttrans) increased. The tensile strength and % elongation also increased with epoxy resin-content. The extent of shape recovery increased with PTMO-content with a minor penalty in recovery time. The polymer with the maximum PTMO-content exhibited 99% shape recovery with a recovering time of 12s.
KW - Cure kinetics
KW - Epoxy resin
KW - Poly(tetramethylene oxide)
KW - Shape memory polymer
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U2 - 10.1080/10601320701864245
DO - 10.1080/10601320701864245
M3 - Article
AN - SCOPUS:43249104841
SN - 1060-1325
VL - 45
SP - 312
EP - 322
JO - Journal of Macromolecular Science - Pure and Applied Chemistry
JF - Journal of Macromolecular Science - Pure and Applied Chemistry
IS - 4
ER -