News Column

Data on General Science Reported by J.M. Garcia and Colleagues

June 13, 2014



By a News Reporter-Staff News Editor at Science Letter -- Research findings on Science are discussed in a new report. According to news reporting from Riyadh, Saudi Arabia, by NewsRx journalists, research stated, "Nitrogen-based thermoset polymers have many industrial applications (for example, in composites), but are difficult to recycle or rework. We report a simple one-pot, low-temperature polycondensation between paraformaldehyde and 4,4'-oxydianiline (ODA) that forms hemiaminal dynamic covalent networks (HDCNs), which can further cyclize at high temperatures, producing poly(hexahydrotriazine)s (PHTs)."

The news correspondents obtained a quote from the research, "Both materials are strong thermosetting polymers, and the PHTs exhibited very high Young's moduli (up to similar to 14.0 gigapascals and up to 20 gigapascals when reinforced with surface-treated carbon nanotubes), excellent solvent resistance, and resistance to environmental stress cracking. However, both HDCNs and PHTs could be digested at low pH (

According to the news reporters, the research concluded: "For example, when poly(ethylene glycol) (PEG) diamine monomers were used to form HDCNs, elastic organogels formed that exhibited self-healing properties."

For more information on this research see: Recyclable, Strong Thermosets and Organogels via Paraformaldehyde Condensation with Diamines. Science, 2014;344(6185):732-735. Science can be contacted at: Amer Assoc Advancement Science, 1200 New York Ave, NW, Washington, DC 20005, USA. (Springer - www.springer.com; Science - www.springerlink.com/content/0926-7220/)

Our news journalists report that additional information may be obtained by contacting J.M. Garcia, King Abdulaziz City Sci & Technol, Riyadh 11442, Saudi Arabia. Additional authors for this research include G.O. Jones, K. Virwani, B.D. McCloskey, D.J. Boday, G.M. ter Huurne, H.W. Horn, D.J. Coady, A.M. Bintaleb, A.M.S. Alabdulrahman, F. Alsewailem, H.A.A. Almegren and J.L. Hedrick (see also Science).

Keywords for this news article include: Asia, Riyadh, Science, Saudi Arabia

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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