Polymer Degradation ( You can read here in Bengali)

What is Polymer Degradation?

Polymer degradation is generally undesirable. The term degradation means uncontrolled reduction in the molecular weight or constitution of the polymer.

Degradation involves rupture of chemical bonds in the main chain of the polymer. When the polymer losses its lusture & strength, this deteriration in properties is due to a phenomenon called polymer degradation.

Types of Polymer degradation:

1. Physical degradation.
2. Chemical degradation.


Mention what factors are influence/ main causes for the degradation of polymer?

1. Physical degradation:

• Thermal Condition
• Mechanical condition
• By Ultrasonic Waves
• Photo degradation
• Degradation by Light energy
• Ionizing degradation. 

2. Chemical degradation:

• Oxidative degradation
• Hydrolytic
• Acidolytic
• Aminolytic

How Can you Control the Polymer degradation?

• Polymer degradation can be control by using Anti- Oxidants.
• Heat Stabilizer, which tends to inhibit the reaction between two or more other Chemicals. The term can also refer to a chemical that inhibits seperation of suspensions, emulsions & foams.
• By using Light Stabilizer.

What do you mean by Functionality?

The number of reactive functional groups of replaceable H2 atoms present in amonomer or the number of hydrogenation that can be added to a monomer is called functionality of the monomer.

Example: HOOC-(CH2)4-COOH      [ Functionality= 2]

                 

                 CH3-COOH                       [ Functionality= 1]

click the link for the detals study on controlling of polymer degradation.