Development of a sampling and analytical method for measuring the epoxy content of aerosols. II. Application of the method to epoxy-containing aerosols
Aerosols generated by epoxy spray painting consist of droplets containing partially-cured mixtures of epoxy resins and curing agents, as well as pigments, solvents and diluents. A sampling and analytical method has been developed to measure the epoxy content of these aerosols. The method collects the aerosol in a midget impinger containing dimethyl formamide, which inhibits the curing reaction between the epoxy and curing agent, preserving the unreacted epoxy functional groups present in the aerosol. The impinger contents are analyzed by reacting the epoxy with an excess of bromide generated in situ from tetraethylammonium bromide, and measuring the unreacted bromide in the reaction mixture by normal pulse polarography. The precision and accuracy of the method have been evaluated using a pure epoxy resin as a model compound. The method was applied to aerosols containing mixtures of epoxy resin and amine curing agents in various degrees of cure, to aerosols containing large quantities of nonepoxy compounds, and to aerosols of epoxy surface coatings. The method is capable of precise and accurate measurement of epoxide functionality, and it applicable to the measurement of epoxy-containing aerosols in spray finishing operations.
- Research Organization:
- National Institute for Occupational Safety and Health, Cincinnati, OH
- OSTI ID:
- 5609190
- Journal Information:
- Am. Ind. Hyg. Assoc. J.; (United States), Vol. 48:9
- Country of Publication:
- United States
- Language:
- English
Similar Records
Epoxy resin system for in situ rehabilitation of pipes
SYNTHESIS OF THERMALLY STABLE EPOXY RESINS FOR DIELECTRIC APPLICATIONS. Period covered: March 1, 1958 through February 28, 1959
Related Subjects
AEROSOLS
CHEMICAL COMPOSITION
EPOXIDES
MEASURING METHODS
ACCURACY
AIR POLLUTION
EXPOSURE CHAMBERS
POLAROGRAPHY
SAMPLING
SOLVENTS
COLLOIDS
DISPERSIONS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
POLLUTION
SOLS
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)