Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Types of polymer degradation

7,448 views

Published on

this slide concludes the types of polymer degradation into 5 types and make a shortcut for good understanding

Published in: Science
  • Dating for everyone is here: ❤❤❤ http://bit.ly/39sFWPG ❤❤❤
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Dating direct: ❶❶❶ http://bit.ly/39sFWPG ❶❶❶
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here

Types of polymer degradation

  1. 1. Created by o Kotchawan Srimala o Supa Sunthornvatin o Kanokwun Meesuntud o Varinya Panusuvat TYPES OF POLYMER DEGRADATION
  2. 2. Created by o Kotchawan Srimala o Supa Sunthornvatin o Kanokwun Meesuntud o Varinya Panusuvat Photodegradation Polymers can be degraded by photolysis to give lower molecular weight molecules. Electromagnetic waves with the energy of visible light or higher are usually involved in such reactions.
  3. 3. Created by o Kotchawan Srimala o Supa Sunthornvatin o Kanokwun Meesuntud o Varinya Panusuvat Mechanical Degradation Polymers can be crack in small pieces by external load.
  4. 4. Created by o Kotchawan Srimala o Supa Sunthornvatin o Kanokwun Meesuntud o Varinya Panusuvat Oxidative degradation Occurs when polymer is attacked by atmospheric oxygen, especially at high temperatures during processing. Many process methods involve pumping molten polymer into tools, and the high temperatures needed for melting may result in oxidation unless precautions are taken
  5. 5. Created by o Kotchawan Srimala o Supa Sunthornvatin o Kanokwun Meesuntud o Varinya Panusuvat Hydrolytic degradation Occurs in polymer that have amide or ester functions through the “hydrolysis reaction”.
  6. 6. Created by o Kotchawan Srimala o Supa Sunthornvatin o Kanokwun Meesuntud o Varinya Panusuvat Biodegradation Biodegradable plastics can be biologically degraded by microorganisms to give lower molecular weight molecules. Biodegradation is very difficult occurs due to the lack of oxygen and moisture.

×