Influence of e-beam irradiation on the chemical and crystal structure of poly(aliphatic/aromatic-ester) multiblock thermoplastic elastomers

El Fray, Miroslawa; Piątek-Hnat, Marta; Puskas, Judit; Foreman-Orlowski, Elizabeth

doi:10.2478/v10026-012-0073-6

Abstract

Poly(aliphatic/aromatic-ester) (PED) multiblock copolymers belong to the class of thermoplastic elastomers (TPEs), characterized by a physical network of semi-crystalline hard segments. The PEDs were modified with e-beam to create an additional network structure. Polymers were evaluated using SEC, WAXS, DSC and quasi-static tensile tests. E-beam irradiation induced a significant increase of molecular weight and tensile strength of the PEDs. This effect, together with the diminished degree of crystallinity can be explained by the formation of chemical crosslinks, which are located in the hard phase segments.

References

Wilkins, E. G., Rees, R. S., Tenenbaum, N. R., Robson, M. & Smith, D. J. Skin and Subcutaneous Tissue Review in General Surgery. In O'Leary JP, Capote LR (eds), 2003, The Physiologic Basis of Surgery, Baltimore, MD, Williams & Wilkins.
Search in Google Scholar
Ong, S. E., Zhang, S., Du, H., Too, H. C. & Aung, K. N. (2007). Influence of silicon concentration on the haemocompatibility of amorphous carbon. Biomaterials, 28, pp. 4033-4038, DOI: 10.1016/j.biomaterials.2007.05.031.10.1016/j.biomaterials.2007.05.031
Search in Google Scholar
El Fray, M., Bartkowiak, A., Prowans, P. & Slonecki, J. (2000), Physical and mechanical behaviour of electron-beam irradiated and ethylene oxide sterilized multiblock polyester. J Mater. Sci. Mater. Med., 11, pp. 757-762, DOI: 10.1023/A:1008936114611.10.1023/A:1008936114611
Search in Google Scholar
Prowans, P., El Fray, M., Slonecki, J. (2002) Biocompatibility studies of new multiblock poly(esterester)s composed of poly(butylene terephthalate) and dimerized fatty acid. Biomaterials, 23, pp. 2973-2978, DOI: 10.1016/S0142-9612(02)00026-1.10.1016/S0142-9612(02)00026-1
Search in Google Scholar
Renke-Gluszko, M. & El Fray, M. (2004), The effect of simulated body fluid on mechanical properties of multiblock poly(aliphatic/aromatic-ester) copolymers. Biomaterials, 25, pp. 5191-5198, DOI: 10.1016/j.biomaterials.2003.12.021.10.1016/j.biomaterials.2003.12.021
Search in Google Scholar
El Fray, M. & Slonecki, J. (1996), Multiblock copolymers consisting of polyester and polyaliphatic blocks. Angew. Mikromol. Chemie, 234, pp. 103-117.10.1002/apmc.1996.052340110
Search in Google Scholar
El Fray, M., Przybytniak, G., Piątek-Flnat, M. & Kornacka, E. (2010), Physical effects of radiation processes in poly(aliphatic/aromatic-ester)s modified with e-beam radiation. Polymer, 51, pp. 1133-1139, DOI: 10.1016/j.polymer.2010.01.028.10.1016/j.polymer.2010.01.028
Search in Google Scholar
Mallegol, J, Carllson, DJ, Deschenes, L. (2001), Post-γ-irradiation reactions in vitamin Estabilised and unstabilised HDPE. Nucl Instr Meth Phys Res B, 185, pp. m283-293, DOI: 10.1016/S0168-583X(01)00944-2.10.1016/S0168-583X(01)00944-2
Search in Google Scholar
Gorna, K. & Gogolewski, S. (2003), The effect of gamma radiation on molecular stability and mechanical properties of biodegradable polyurethanes for medical applications. Polym Degrad Stab, 79, pp. 465-474, DOI: 10.1016/S0141-3910(02)00362-2.10.1016/S0141-3910(02)00362-2
Search in Google Scholar
Gotz, C., Handge, U. A., Piatek, M., El Fray, M. & Altstadt, V. (2009), Influence of E-Beam Irradiation on the Dynamic Creep and Fatigue Properties of Poly(aliphatic/aromatic-ester) Copolymers for Biomedical Applications. Polymer, 50, pp. 5499-5507, DOI: 10.1016/j.polymer.2009.09.051.10.1016/j.polymer.2009.09.051
Search in Google Scholar
El Fray, M. & Altstädt, V. (2003), Fatigue behaviour of multiblock thermoplastic elastomers. 2. Dynamic creep of poly(aliphatic/aromatic-ester) copolymers. Polymer, 44, pp. 4643-4650, DOI: 10.1016/S0032-3861(03)00418-X.10.1016/S0032-3861(03)00418-X
Search in Google Scholar

Influence of e-beam irradiation on the chemical and crystal structure of poly(aliphatic/aromatic-ester) multiblock thermoplastic elastomers

Abstract

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