title: Investigation of acrylic acid at high pressure using neutron diffraction.
abstract: 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 rationalized 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 polymerizing on decompression to ambient pressure. The resulting product is analyzed via Raman and FT-IR spectroscopy and differential scanning calorimetry and found to possess a different molecular structure compared with polymers produced via traditional routes.
authors.affiliation: Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde , 161 Cathedral Street, Glasgow, U.K. , G4 0RE.
authors.forename: Blair F
authors.initials: BF
authors.lastname: Johnston
authors.forename: William G
authors.initials: WG
authors.lastname: Marshall
authors.forename: Simon
authors.initials: S
authors.lastname: Parsons
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Urquhart
authors.forename: Iain D H
authors.initials: ID
authors.lastname: Oswald
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D018360:Crystallography, X-Ray; D008968:Molecular Conformation; D033363:Neutron Diffraction; D044367:Phase Transition; D011312:Pressure; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D000179:Acrylates; C036658:acrylic acid