Macromolecules All Publications/Website. Thermal and Oxidative Degradation of Polymers In recent decades synthetic polymeric materials, be-cause of their unique physical properties, have rapidly replaced more traditional materials such as steel and nonferrous metals, as well as natural polymeric materi … At high temperatures the components of the long chain backbone of the polymer can begin to separate and react with one another to change the properties of the polymer. Thermal Degradation of Polymers and Polymer Models.
At high temperatures the components of the long chain backbone of the polymer can begin to be broken (chain scission) and react with one another to change the properties of the polymer. Thermal-Oxidative Degradation of Rubber Most elastomers will undergo significant changes over time when exposed to heat, light, or oxygen (ozone). Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The results suggest changes in the degradation mechanism with the fraction of mass loss for both the studied … Overview The degradation of waste plastics into fuel for the recovery of the organic content of the polymeric material represents a sustainable way of saving valuable petroleum resources in addition to protecting and conserving the environment. Three of the polymers were prepared by reacting methyl nadic anhydride, maleic anhydride, and m‐phenylenediamine with diglycidyl ether of bisphenol‐A; the other two were obtained by reacting methyl nadic anhydride and m‐phenylenediamine with resorcinol diglycidyl ether. Thermal degradation of polymers is molecular deterioration as a result of overheating. Learn more about Chapter 10: Recycling of Polymers by Thermal Degradation on GlobalSpec. Thermal degradation of polymers is molecular deterioration as a result of overheating. However, it is not possible as at times the thermal point increases and the polymer covalent bonds are severely affected. One of the major disadvantage though is thermal degradation of polymeric materials leading to its limited applications. LCS Laboratory offers laboratory study of thermal degradation of polymers. One is a random scission of links, causing a MW reduction of the raw polymer and the other is a chain-end scission of C–C bonds, generating volatile products [35] . These changes can have a dramatic effect on the service life and properties of the elastomers and can only be prevented or slowed down by the addition of UV stabilizers, antiozonates, and antioxidants. Thermal degradation is usually accelerated by the oxidants, and as a result, the onset decomposition temperature of polymer is decreased in an atmosphere containing oxygen. Thermal-Oxidative Degradation of Polymers Heat (thermal degradation) The thermal degradation of five crosslinked epoxide polymers were studied in vacuo by differential thermogravimetry. V A Model for Copoly(styrene- methyl methacrylate) GD Fallon, KA Holland, ID Rae Australian Journal of Chemistry | Published : 1990 DOI: 10.1071/CH9900521. The presence of oxidants may drastically change both the degradation rate and its mechanism. OR SEARCH CITATIONS Kinetic parameters such as activation energy and pre-exponential factor were determined considering the Ozawa and Freeman–Carroll methods. At high temperatures the components of the long chain backbone of the polymer can begin to separate and react with one another to change the properties of the polymer. This work presents an in-depth kinetic study of the thermal degradation of recycled acrylonitrile-butadiene-styrene (ABS) polymer.
The thermal degradation of sodium hyaluronate, xanthan and methylcellulose was evaluated by thermogravimetric and infrared analysis.


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