Standard Practices for Evaluating the Resistance of Plastics to Chemical Reagents

Importancia y uso:

4.1 There are limitations of the results obtained from these practices. The choice of types and concentrations of reagents, duration of immersion or stress, or both, level of stress, temperature of the test, and properties to be reported are necessarily arbitrary. The specification of these conditions provides a basis for standardization and serves as a guide to investigators wishing to compare the relative resistance of various plastics to chemical reagents.

4.2 Correlation of test results with the actual performance or serviceability of plastics is necessarily dependent upon the similarity between the testing and the end-use conditions. For applications involving continuous immersion, the data obtained in short-time tests are of interest only in eliminating the most unsuitable materials or indicating a probable relative order of resistance to chemical reagents.

4.3 Evaluation of plastics for special applications involving corrosive conditions shall be based upon the particular reagents and concentrations to be encountered. Base the selection of test conditions on the manner and duration of contact with reagents, the temperature of the system, applied stress, and other performance factors involved in the particular application.

4.4 The practices present general guidelines without covering specifics on all the varied applications of plastics, such as use in automobiles and exposure to various automotive fluids, or use in hospital environments with exposure to disinfectants and cleaning fluids. These practices can be extended to such applications with specifics on the study conducted noted in the report.

4.5 The use of appropriate controls is critical to evaluate the utility of the information generated by these practices. Particular attention should be given to the variability in the data generated, especially for the baseline controls, and issues in data generation reported to mitigate misuse of information.

Subcomité:

D20.50

Referida por:

F0715-07R23, D0896-04R17, C0425-22, G0020-10R24, C1349-17R24, D3105-17R24, D5322-23, F2968_F2968M-24, C0425-22, F2649-14R23, F3541-22, F3127-22, A0742_A0742M-23A, F2019-22, D2513-24, F0619-20, F2945-18R23, F2817-13R23, F3033-16R21, F1901-22, D5592-94R18, C1173-22, F2818-10R23, D1239-22A, C0923_C0923M-20, F2618-24, C1478_C1478M-20, D2517-18R23, A1113_A1113M-20E01, D4551-22, F3534_F3534M-22, D8436-23, F3597-23, C1482-24E01, F1407-12R17, D5260-22, C1644-06R17, F1412-22, D8179-18R24, F2785-21, G0127-15R23, F2303-03R21, C1208_C1208M-18R22, D4101-24, D2990-17, C0425-22, F0665-09R24, F1673-10R21E01, F1216-24, D4068-17R22, D6112-23, F0790-23, F1743-22, C1594-23, D5813-04R18, C0647-19, F0739-20, D3032-21A, D4762-23, D7474-17, D5870-22, F1383-20, F2207-06R23

Volúmen:

08.01

Número ICS:

83.080.01 (Plastics in general)

Palabras clave:

appearance; chemical reagent; color; dimensional changes; exposure; mechanical property changes; plastics; stress;