Journal
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
Volume 46, Issue 11, Pages 1039-1048Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10601320903245342
Keywords
Formamide; polymerization; hydrocyanic acid; (HCN)(x); FT-IR; XPS; Raman spectroscopy; pyrolysis
Categories
Funding
- Italian Space Agency (ASI) [I/015/07/0]
Ask authors/readers for more resources
Prolonged heating of formamide (HCONH(2)) at 185 degrees C or 220 degrees C produces a black insoluble product. The FT-IR spectroscopy and the X-ray photoelectron spectroscopy (XPS) suggest that the product has the chemical structure of a polymer of hydrocyanic acid: (HCN)(x). The pyrolysis of (HCN)(x) prepared from formamide produces a large amount of gaseous HCN in a wide range of temperatures together with ammonia (NH(3)) and isocyanic acid (H-N-C=O). During the thermal decomposition of formamide to produce (HCN)(x), the volatile products evolved were monitored with gas phase infrared spectroscopy. At 185 degrees C, the gaseous product released were CO(2), CO and NH(3) while at 220 degrees C, also HCN was detected. In both cases, a white sublimate was collected in the upper part of the reaction vessel. It consists of ammonium carbamate and its hydrolysis products ammonium carbonate and hydrogen carbonate. It is therefore possible to synthesize the polymer of hydrocyanic acid (HCN)(x) starting from formamide avoiding to handle the dangerous hydrocyanic acid.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available