Determination of the epoxide equivalent weight of glycidyl ethers by proton magnetic resonance spectrometry

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac50016a020· OSTI ID:7100505

Dorsey, J G; Dorsey, G F; Rutenberg, A C; Green, L A

A proton nuclear magnetic resonance method to determine the epoxide equivalent weight (EEW) of several commercial epoxy resins has been developed. The precision and accuracy of the proton NMR method have been calculated for commercial resins as well as phenyl glycidyl ether. The data compare well with that of the conventional ASTM method of reacting the epoxy with hydrogen bromide in glacial acetic acid. The EEW of phenyl glycidyl ether at the 95% confidence interval determined by the proton NMR method is 150.2 +- 1.1 and by the ASTM method is 151.6 +- 0.6 as compared to a theoretical value of 150.17. The proton NMR method is rapid, free of interfering chemical reactions, requires a small sample, and simultaneously provides a fingerprint of the material investigated.

• Research Organization: Oak Ridge Y-12 Plant, TN
• OSTI ID: 7100505
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 49:8; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACCURACY
EPOXIDES
ETHERS
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RESINS
RESONANCE
SENSITIVITY