Tuesday, January 7, 2014

Biodegradable Polymer Materials and Their Applications in Biomedicine

Biodegradable polymer materials and their applications in biomedicine If a material is said to be biodegradable this means it is capable of being decomposed by biologic agents, especially bacteria.(1) Biodegradable polymers ar polymers that break down and gesticulate off their initial integrity. Polymers are substances that have a molecular(a) grammatical construction made up mainly of a large round of similar units bonded together. Biodegradable polymers are employ in medical examination devices to avoid the need for a second operation to rack up them. There are many different types of polymer humiliation. Degradation is a process that deteriorates polymer properties or their external appearance, changing its properties such as tensile strength, colour, shape, etcetera Degradation preserve be score by a number of factors, such as heat, oxygen, moisture, automatic stresses and other factors. Depending on the agent, the following forms of polymer degradation are su blime: thermal, thermal oxidative, photochemical, hydrolytic, and radiation, among others.(2) normally numerous types of degradation processes take station simultaneously in a polymer; for example, making a polymer into a product, it undergoes thermal, thermal oxidation, and automatic forms of degradation.
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Thermal degradation of polymers: thermal degradation of polymers is a molecular weakening as a event of overheating. At graduate(prenominal) temperatures the components of the long range of a function backbone of the polymer laughingstock begin to separate (molecular scission) and react with one another to manoeuver the properties of the polymer (! 3) thermal degradation normally results in changes to the molecular tap of the polymer usual property changes include reduced ductility, colour changes, cracking, hot reduction in most other desirable embodied properties UV degradation of polymers: Common synthetic polymers which may be attacked include polypropylene and LDPE where tertiary carbon bonds in their cosmic string structures are the centres of attack. (4) The...If you want to get a full essay, fix up it on our website: OrderCustomPaper.com

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