Effect of monomer modification on the physico-chemical properties, degradation and in vitro biocompatibility of polyester bioelastomers

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A careful selection of monomers for biomaterial syntheses is essential for determining and controlling the functionality and biocompatibility of the biomaterials to be produced. Synthetic polyester elastomers based on molecules that are endogenous to the human metabolism have been designed [1]. In earlier studies, several investigators have reported elastic polyesters based on citric acid, in particular polyoctanediol citrate (POC) [2], poly(alkenylene maleate citrate) [3], poly(xylitol-co-citrate) [4] and poly(mannitol citric dicarboxylate) [5]. Although a number of biodegradable elastomers have been developed, most of them require complex and expensive synthetic procedures, which translate into higher manufacturing costs and hinder the commercial and clinical implementation of their use in tissue engineering [6]. Also, as more stringent material requirement in tissue engineering is made, there is a continuous need for newer materials’ design and synthesis [7]. The objective of the present work is to design polyesters using citric acid, sebacic acid, itaconic acid and 1,12-dodecanediol. To synthesize the polyesters by melt condensation, thermal polyesterification technique without using catalysts or coreagents, making this method attractive for the synthesis of polyesters useful in medical applications. The chosen monomers are expected to provide the polyesters with physico-chemical properties that could be significantly impact the degradation and biocompatibility of the synthesized polyesters. Materials and Methods Results and Discussion Synthesis and Characterization of the polyesters The copolyesters were synthesized by melt condensation of monomers based on the schematic representation in Figures 1a and 1b. The FT-IR spectra ... ... middle of paper ... ...en BG, Tse MY, Turner ND, Knight DK, Pang SC (2006) In vivo degradation behavior of photo-cross-linked star-poly(ε-caprolactone-co-D,L-lactide)elastomers. Biomacromolecules 7: 365-372. 22. Dewez JL, Lhoest JB, Detrait E, Berger V, Dupont-Gillain CC,Vincent LM, Schneider YJ, Bertrand P, Rouxhet PG (1998) Adhesion of mammalian cells to polymer surfaces: from physical chemistry of surfaces to selective adhesion of defined patterns. Biomaterials 19: 1441-1445. 23. Neff JA, Caldwell KD, Tesco PA (1998) A novel method for surface modification to promote cell attachment to hydrophobic substrates. J Biomed Mater Res 40:511-519. 24. Santos Jr AR, Barbanti SH, Duek EAR, Dolder H, Wada RS, Wada MLF (2001) Growth and differentiation of Vero cells on poly(L-lactic acid) membranes of different pore diameters. Artif Organs 25:7-13. 25. Birdi K (1981) Cell adhesion on solids and th

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