Shape memory characterization of polytetra methylene oxide/poly (acrylic acid-co-acrylonitrile) complexed gel
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Polymer gels of poly(acrylic acid-co-acrylonitrile) [p(AA-co-AN)] of varying compositions were synthesized and complexed with polytetramethylene oxide (PTMO) to get PTMO/p(AA-co-AN) complexed gels. The complexation occurred through H-bonding of carboxyl group of acrylic acid with ether group of PTMO. The PTMO/p(AA-co-AN) gels were characterized by DSC, DMTA and swelling ratio. Their shape memory property was evaluated by bending tests. The swelling ratio of [p(AA-co-AN)] in PTMO (as solvent) increased and Tg of the complexed gel diminished with enhancement in the acrylic acid-content in the copolymer. The modulus ratio (Eg/Er) increased with the acrylic acid content, which is conducive to better shape memory and shape recovery properties of the gels. The influence of the copolymer composition on the swelling ratio, Tg, dynamic mechanical and the shape memory properties of the complexes is examined and presented. The gels showed a shape recovery of >90%, which increased with the acrylic acid content in the copolymer.
KeywordsAcrylic Acid Shape Memory Shape Memory Effect Shape Recovery Modulus Ratio
The authors acknowledge VSSC for granting permission to publish this paper. Thanks are due to IICT, Hydrabad for DMA analysis. Ms.D Merline. J thanks University Grants Commission, New Delhi for a research fellowship.
- 11.Tanaka T (1992) Am Chem Soc Symp 480:1Google Scholar
- 17.Merline JD, Nair CPR, Gouri C, Ninan KN (in press) Polym Int Google Scholar
- 18.Yu X, Tanaka A, Tanaka K, Tanaka T (1992) J Am Chem Soc 66:514Google Scholar
- 22.Reyntjeins WG, Filip Du Prez E, Goethals EJ (1999) Macromol Rapid Commun 20:250Google Scholar