This article details the exploration of perdeuterated acrylic acid at high pressure using neutron diffraction. The structural changes that occur in acrylic acid-d4 are followed via diffraction and rationalised using the Pixel method. Acrylic acid undergoes a reconstructive phase transition to a new phase at ~0.8 GPa and remains molecular to 7.2 GPa before polymerising on decompression to ambient pressure. The resulting product is analysed via Raman, FT-IR spectroscopy and Differential Scanning Calorimetry and found to possess a different molecular structure compared with polymers produced via traditional routes.
Johnston, B. F., Marshall, W. G., Parsons, S., Urquhart, A., & Oswald, I. D. H. (2014). Investigation of Acrylic Acid at High Pressure using Neutron Diffraction. The Journal of Physical Chemistry B, 118(14), 4044-4051. https://doi.org/10.1021/jp502095n