Abstract：The shear fatigue behavior of vulcanized natural rubber (NR) under constrained condition was investigated by Gel Permeation Chromatography(GPC), Attentuated Total Reflectance-Fourier Transform InfraRed(ATR-FTIR) spectroscopy, and Gas Chromatography-Mass Spectrometry(GC-MS). The results showed that in the shear fatigue process molecular chains were first broken under one-dimensional compression load, and then oxygen aging occurred.At the same time, some of the low-molecular mass degradation products and free state fillers migrated and agglomerated at the stress concentration regions.
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