By Vinod B. Damodaran, Divya Bhatnagar, N. Sanjeeva Murthy
This publication provides a entire evaluation at the numerous processing and post-processing methodologies for biodegradable polymers. Written by way of execs with hands-on event on polymer processing, this ebook presents first-hand wisdom of all modern processing concepts. the present prestige and destiny demanding situations within the box are defined, in addition to a framework for designing novel units for wanted applications.
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Extra info for Biomedical Polymers: Synthesis and Processing
Synthesis and evaluation of poly(diol citrate) biodegradable elastomers. Biomaterials 27(9): 1889–1898. 11. N. Yousaf. 2008. Poly(triol a-ketoglutarate) as biodegradable, chemoselective, and mechanically tunable elastomers. Macromolecules 41(17): 6347–6352. 12. , et al. 2015. Biodegradable citrate-based polyesters with S-nitrosothiol functional groups for nitric oxide release. Journal of Materials Chemistry B 3(48): 9233–9241. 13. , et al. 2003. Versatile route to polyol polyesters by lipase catalysis.
The majority of these are step-growth polymerizations, which involve the stepwise condensation of bifunctional monomers with the elimination of small molecules such as water and HCl. A generalized equation for the linear polycondensation reaction involving two bifunctional monomers A and B can be given as: nA þ nB ! AðABÞnÀ1 B ð2:1Þ For example, polyesters, an important class of biomedical polymers, are commonly prepared by condensation polymerization between a diol and a diacid with the elimination of water molecules (Fig.
Because of these different types of equilibria, the polymerizability of a monomeric species is largely determined by various thermodynamic factors such as temperature, pressure, and monomer concentrations. Additionally the nature of the monomer species, such as amorphous or crystalline, substituents, and structure are found to have a signiﬁcant influence on the polymerizability and selectivity of a 34 2 Biomedical Polymers: Synthetic Strategies Fig. 11 Molecular weight proﬁle of controlled and living addition polymerizations particular polymerization mechanism.