Open AccessInvestigation of Acrylic Acid at High Pressure Using Neutron Diffraction
Author(s) -
Blair F. Johnston,
William G. Marshall,
Simon Parsons,
Andrew J. Urquhart,
Iain D. H. Oswald
Publication year - 2014
Publication title -
the journal of physical chemistry b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 392
eISSN - 1520-6106
pISSN - 1520-5207
DOI - 10.1021/jp502095n
Subject(s) - acrylic acid , differential scanning calorimetry , neutron diffraction , diffraction , raman spectroscopy , materials science , polymerization , phase (matter) , phase transition , polymer , chemistry , analytical chemistry (journal) , polymer chemistry , organic chemistry , monomer , optics , composite material , thermodynamics , physics
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.
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