Measurement occurs when the polymer does not absorb water anymore Water Absorption 24 hrs at 100☌ - Immersion of a plastic specimen in distilled boiling water during 24 hours Water Absorption at saturation - Immersion of a plastic specimen in distilled water at 23☌.Water Absorption 24 hrs at 23☌ - Immersion of a plastic specimen in distilled water during 24 hours at 23☌.Water absorption is expressed as increase in weight percent or % weight gain of a plastic specimen under following testing procedures: Changes in mechanical (elasticity, tensile strength, impact strength) and electrical performance.However, absorbed water also can lead to irreversible degradation of the polymer structure. Glass transition temperature and strength of plastic – which is a reversible effect. Absorbed moisture has been shown to act as a plasticizer, reducing the Moisture/water absorption is the capacity of a plastic or a polymer to absorb moisture from its environment. Indeed, superabsorbent polymers are gaining traction in advanced application in medical, construction etc., however at the same time, absorption capacity of thermoplastics lead to several changes w.r.t processing and properties. Some polymers have a natural tendency to absorb water.
