ASTM D1243 – Standard Test Method for Dilute Solution Viscosity of Vinyl Chloride Polymers
Description:
Significance and Use
5.1 Dilute solution viscosity values for vinyl chloride polymers are related to the average molecular size of that portion of the polymer that dissolves in the solvent.
Scope
1.1 This test method covers the determination of the dilute solution viscosity of vinyl chloride polymers in cyclohexanone. The viscosity is expressed in terms of inherent viscosity (logarithmic viscosity number). The test method is limited to those materials that give clear, uniform solutions at the test dilution.
NOTE 1: Other expressions for viscosity may be used as described in the Appendix, but any change from the test method as specified shall be stated in the report.
1.2 The values stated in SI units are to be regarded as the standard.
ASTM D1242