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( 2 . 7 ) For polystyrene, a relaxation time associated with con - figurational rearrangements, c o n f i g , follows a
For polystyrene, a relaxation time associated with con
figurational rearrangements, follows a Vogel
Fulcher law,
exp
where and are constants, with and
A value of the experimental glass transition temperature is measured with an experiment carried out at an effective timescale tau exps and found to be deg C a another experiment is carried out at an effective timescale of s what is the value of the glass transition temperature that this experiment obtains? bor what timescale must an experiment be carried out if it is to measure a glass transition temperature within deg C of the VogelFulcher temperature T Is this practically possible?
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