The document discusses environmental degradation of polymers. It defines monomers as small molecules used to synthesize polymers through chemical bonding. Polymer degradation is a change in properties like strength, color or shape due to environmental factors like heat, light or chemicals. There are various types of degradation including thermal, photo-oxidative, mechanical, biological and through irradiation or chemicals. Reducing eliminated byproducts like HCl from thermal degradation of PVC can help reduce degradation, as can using polymers with strong chemical bonds.

1. Environmental
degradation of
polymers
PRESENTED
BY:
1.VISHAL
2.RAHIL
3.HUSSAIN

2. Polymer
and
monomer
Monomer: The term monomer refers to the
small molecule from which a polymer is
synthesized.
Polymer: Polymer is defined chemical bonding
of a monomer to produce a huge structure.
Each molecule of an organic substance is
considered as monomer and combination of
such monomers to produce a huge structure is
known as polymer.

5. Polymer
degradation
• Polymer degradation is a change in the
properties of the polymer, such tensile
strength, color, shape, and molecular
weight, or of a polymer-based product
under the influence of one or more
environmental factors, such as heat,
light, chemicals, or any other applied
force

6. Types of polymer
degradation
• Various types of polymer degradation
method including thermal, photo
oxidative, mechanical, biological, by
irradiation and chemical have been
used traditionally

7. How to fix polymer degradation
• In the thermal degradation process of PVC, HCl molecules
are eliminated. This eliminated HCl also increases the
degradation process. By removing HCl, degradation can be
reduced. Polymers with high bond strength are resistant to
degradation

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