Predictive aging of polymers

Details Predictive aging of polymers Predictive aging of polymers

1989-06-16

1990-09-18

Yasich, Daniel M.

Measuring and testing

Instrument mechanism or transmission

Rate of change

219502, 250372, 374 53, G01N 2100, G01N 2500

Patent

active

049570129

ABSTRACT:
A method of predicting aging of polymers operates by heating a polymer in the outdoors to an elevated temperature until a change of property is induced. The test is conducted at a plurality of temperatures to establish a linear Arrhenius plot which is extrapolated to predict the induction period for failure of the polymer at ambient temperature. An Outdoor Photo Thermal Aging Reactor (OPTAR) is also described including a heatable platen for receiving a sheet of polymer, means to heat the platen and switching means such as a photoelectric switch for turning off the heater during dark periods.

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