B.Pharm 7th sem Gastro intestinal drug delivery system

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Usually, polymers show a combined behavior of elastic and
plastic deformation (Fig. D) depending on the temperature and
strain rate. At low temperature and high strain rate, elastic
behavior is observed, and at high temperature but low strain rate,
the viscous behavior is observed. The combined behavior of
viscosity and elasticity is observed at intermediate temperature
and strain rate values. This behavior is termed as