In our previous work, we showed that the structural recovery responses of an epoxy after relative humidity (RH)-jumps through the glass concentration have similar phenomenology to, but different kinetics from, those obtained by temperature (T)-jumps. In this article, we report results from physical aging experiments of the same epoxy after RH-jumps. The results show that time-RH superposition and time-aging time superposition can be used to describe the viscoelastic responses in RH-jump experiments. The similarities and differences between RH-jump and T-jump conditions are also presented. In addition, the difficulties in modeling the combined effects of temperature and relative humidity changes that result from these differences are discussed.
|Number of pages||15|
|Journal||Journal of Polymer Science, Part B: Polymer Physics|
|Issue number||11 SPEC. ISS.|
|State||Published - Jun 1 2004|
- Glass transition
- Physical aging
- Structural recovery