Investigation of Acrylic Acid at High Pressure Using Neutron Diffraction

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• 作者：Blair F. Johnston ; William G. Marshall ; Simon Parsons ; Andrew J. Urquhart ; Iain D. H. Oswald
• 刊名：Journal of Physical Chemistry B
• 出版年：2014
• 出版时间：April 10, 2014
• 年：2014
• 卷：118
• 期：14
• 页码：4044-4051
• 全文大小：463K
• 年卷期：v.118,no.14(April 10, 2014)
• ISSN：1520-5207

文摘

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.