ISO 4901:2011
Reinforced plastics based on unsaturated-polyester resins — Determination of the residual styrene monomer content, as well as the content of other volatile aromatic hydrocarbons, by gas chromatography
ISO 4901:2011 specifies a method for the determination, by gas chromatography, of the residual styrene monomer in reinforced plastics based on unsaturated polyester (UP) resins in the polymerized state. The residual styrene monomer content is an important criterion in evaluating the degree of cure of UP resins in the polymerized state. The method can also be used for the simultaneous determination of other volatile aromatic hydrocarbons in UP resins.
The method is not applicable to UP resins of high chemical resistance.
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1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Materials
6 Apparatus
7 Preparation of sample
8 Procedure
8.1 General
8.2 Preparation of extraction solvent
8.3 Preparation of test solution
8.4 Determination of glass and mineral content
8.5 Preparation of calibration solutions
8.5.1 General
8.5.2 Preparation of styrene stock solution
8.5.3 Preparation of calibration solutions
8.6 Gas-chromatographic procedure
8.6.1 Gas-chromatograph operating conditions
8.6.2 Recording the gas chromatograms of test solution and calibration solutions
8.6.3 Evaluation of the gas-chromatographic peaks
9 Expression of results
9.1 Calculation of results from a calibration graph
9.2 Calculation of the content of styrene (or another aromatic hydrocarbon) in the original UP resin sample
9.3 Calculation of the content of styrene (or another aromatic hydrocarbon) in the pure UP resin
10 Test report
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1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Materials
6 Apparatus
7 Preparation of sample
8 Procedure
8.1 General
8.2 Preparation of extraction solvent
8.3 Preparation of test solution
8.4 Determination of glass and mineral content
8.5 Preparation of calibration solutions
8.5.1 General
8.5.2 Preparation of styrene stock solution
8.5.3 Preparation of calibration solutions
8.6 Gas-chromatographic procedure
8.6.1 Gas-chromatograph operating conditions
8.6.2 Recording the gas chromatograms of test solution and calibration solutions
8.6.3 Evaluation of the gas-chromatographic peaks
9 Expression of results
9.1 Calculation of results from a calibration graph
9.2 Calculation of the content of styrene (or another aromatic hydrocarbon) in the original UP resin sample
9.3 Calculation of the content of styrene (or another aromatic hydrocarbon) in the pure UP resin
10 Test report