Chemorheology is the distinguished means to elucidate the degradation mechanism of crosslinked polymer at its initial stage. Most of chemorheological research which have been carried out all this while are those related to the scission mechanism of mainchains.
The paper deals with the scission mechanism of crosslink sites of crosslinked polymers which case is very rare all this while using polyurethane vulcanizates in N
2 at high temperature or in
n-BuNH
2/DMSO solution chemical stress relaxation curves thus obtained were found to be consistent with the results theoretically obtained by Tobolsky et al.
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