Properties of Biodegradable Polymers

Biopolymers are polymers that degrade through the action of living organisms. Such polymers include a range of synthetic polymers. 

2-(2 -Hydroxy-5 -methylphenyl)benzotriazole 2-(2 -Hydroxy-5 -tert-butylphenyl)benzotriazole 2-(2 -Hydroxy-3 -tert-butyl-5 -methylphenyl)-5-chlorobenzotri azole 2-(3,5-Di-tert-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole 2-[2 -Hydroxy-3, 5 -bis(a,a-dimethylbenzyl)phenyl]benzotriazole 

4- Diamino-6-(o-methoxyphenyl)-l,3,5-triazine 4,6-Diamino-l,2-dihydro-2,2-dimethyl-l-(2,6-xylyl)-l,3,5-triazine 

4- Diamino-6-(2-methoxyethyl)-l,3,5-triazine 2-Amino-4-ethyl-l,3,5-triazine 2-Amino-4-phenyl-l,3,5-triazine 2-Amino-4-ethyl-6-methyl-l,3,5-triazine 

As can be seen from Table 1.7, in the case of hemp and flax, the elastic modulus is comparable to E-glass and the density is even smaller than that of E-glass. 

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Kissel, T., Demirdere, A., Siemann, U., and Sucker, H., Permeability and release properties of biodegradable polymers, Proc. Int. Symp. Control. Rel. Bioact. Mater., 12. 179, 1985. 

It was our intention in formulating this book to take selected polymers that have been widely studied and provide a comprehensive review of their properties, synthesis, and formulations. We hope that this will be useful to individuals who have been in the field for a long time and who would like to have all the information together in one place, as well as to individuals who are new to the field and would like to understand more about the various properties of biodegradable polymers. 

Daniels, A. U. Chang, M. K. O. Andriano, K. P., Mechanical properties of biodegradable polymers and composites proposed for internal fixation of bone../. Appl. Biomat. 1990, 1, 57-78... 

WOL 98] WoLLERDORFER M., Bader H., Influence of natural fibres on the mechanical properties of biodegradable polymers . Industrial Crops and Products, vol. 8, no. 2, pp. 105-112,1998. 

Factors Affecting Properties of Biodegradable Polymer Blends... 

Liao, J., Guo, X., Nelson, D., Kasper, F.K., Mikos, A.G., 2010. Modulation of osteogenic properties of biodegradable polymer/extracellular matrix scaffolds generated with a flow perfusion bioreactor. Acta Biomater. 6, 2386-2393. 

M. Wollerdorfer, and H. Bader, Influence of natural fibers on the mechanical properties of biodegradable polymers. 7 d. Crops Prod. 8,105-112 (1998). 

An innovative strategy to enhanee the mechanieal properties of biodegradable polymers is the ineorporation of nanomaterials as fillers within polymer matrices. With the appropriate modifications to facilitate dispersion into polymers and to enhance interactions with the snrronnding matrix, nanocomposites have demonstrated improved mechanical properties compared with unfilled polymers or polymers loaded with larger, micrometersized particles. A few studies have also shown enhanced cell function when bone cells are cultured on nanophase ceramic materials. 

Lukanina, J. K. Khvatov, A. V. Kolesnikova, N. N. Popov, A. A. Structure and properties of biodegradable polymer composite materials. Progress in chemical and biochemical physics, kinetics and thermodynamics, 2008,209-218. 

Nonetheless it will be useful for readers to understand the fundamental concepts responsible for the varied properties of biodegradable polymers introduced in Sections 1.1.1 —1.1.7, regardless of whether they are working in designing new biodegradable polymeric materials or working to develop medical devices. 

The medical hterature presents a multimde of applications and their effects on the mechanical properties of biodegradable polymers. As a first application, we consider an increase in mechanical behavior by using the product SmartBone. 

TABLE 16.3 Summary of the Mechanical Properties of Biodegradable Polymer and PLA Blends... 

Y. Kimura, T. Yamaoka, Surface modification and properties of biodegradable polymers based on poly-L-lactides, in N. Ymand M. Terano (Eds.), Surface Science of Crystalline Polymers, Kodansha Scientific Ltd, Tokyo, 1996, p. XVl/163 ff. 

To enhance the desirable properties of biodegradable polymers, it is essential to understand the factors affecting their degradation and control them in order to design a more efficient drug delivery system. Polymer composition, surface properties, crystallinity, etc., are important factors affecting biopolymer degradation properties, in terms of rate and kinetics. 

Wong W H and Mooney D J, Synthesis and properties of biodegradable polymers used as synthetic matrices for tissue engineering . In Synthetic Biodegradable Polymer Scaffolds, ed. A Atala, D J Mooney, J P Vacanti and R Langer, Birkhauser, Boston, USA, 1997, 51-82. 

A CASE STUDY ON SORPTION PROPERTIES OF BIODEGRADABLE POLYMER MATERIALS... 

Lee, S., Lee, Y., and Lee, J.W. (2007) Effect of ultrasound on the properties of biodegradable polymer blends of poly (lactic acid) with poly(butylene adipate-co-terephthalate). Macromd. Res., 15, 44-50. 

Table 4 Glass transition temperatures and dry mechanical properties of biodegradable polymers [9],...

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