Stress cracking is the
major problem that is experienced by polymers when they are subjected to
different environmental conditions. The environmental factors like rain,
sunlight, air result in the crazing in the polymers and when this get combined
with the mechanical stress, the polymers experience cracks on the surface of
the material and many similar issues. This is known as environmental stress
cracking. It is quite different from the polymer degradation as it does not
affect the strength of the polymeric chains. Due to these cracks, the quality of the material gets
affected. Environmental stress cracking
is a major issue especially in the case
of the amorphous polymers as compared to that of semi-crystalline and
crystalline polymers.
How
can the effect of ESC on Polymers be studied?
It is quite impossible to
explore the impact of ESC on the polymers by creating different environment but
the behavior of the polymers under different environmental conditions can be studied on the basis of the roughness of the
surface, molecular structure, chemical bonding, the crystalline structure of the polymers, etc. One of the theories of
the environmental stress explains that the liquid in the form of rain or acid
on the polymeric material can hamper the quality of the polymers and creates
cracks on the facade of the material. The cracking of the material due to environmental stress can be a major threat
to safety. Therefore, it is necessary to
test the effect of ESC on the polymers before using it for any particular application.
ESCR
Tester – To Judge the Effect of Environmental Conditions on Polymers
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