I'm interested in looking at the evolution of S(Q) with temperature in materials with a range of fragilities. SiO2, glycerol, and/or o-terphenyl perhaps? I primarily work with metallic alloys, and most of those can't be cooled slowly enough to get decent data without crystallization.
Although properties change dramatically at the glass transition, there's not a discontinuity in structure at the glass transition. Much of the changes could be explained by increase in viscosity and decrease in thermal expansion coefficient as you lower temperature past the glass transition temperature.
Examples of X-ray studies with temperature on a glass are below.
http://pubs.acs.org/doi/abs/10.1021/ma00237a018 (Polystyrene)
http://www.sciencedirect.com/science/article/pii/S0966979512000064 (Zr-Cu-Al metallic glass)
http://www.sciencedirect.com/science/article/pii/S0022309307010666 (glassy boron oxide)
Thank you very much, but these aren't what I'm looking for. As you say, nothing much happens in the glass. It's the supercooled liquid region from the melt temperature to the glass transition I'm interested in.
Thermal and structural studies of poly(vinyl alcohol)
and hydroxypropyl cellulose blends: Vol.4, No.1, 57-67 (2012) Natural Science
http://dx.doi.org/10.4236/ns.2012.41009
- Badges
- Science method
- Similar topics
- Methodology
- Crystallography
- X-ray Diffraction