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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.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Note 2--Although this test method and ISO 1628-2-1998 differ in approach or detail, data obtained by either are technically equivalent.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D446 Specifications and Operating Instructions for Glass Capillary Kinematic Viscometers
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D1755 Specification for Poly(Vinyl Chloride) Resins
D2857 Practice for Dilute Solution Viscosity of Polymers
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
ISO StandardISO 1628-2 Determination of Viscosity Number and Limiting Viscosity NumberPart 2: Poly(Vinyl Chloride) Resins Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
National Institute of Standards and Technology CircularC-434 Testing of Glass Volumetric Apparatus
UNSPSC Code 13102030(Polyvinyl Chloride PVC)
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ASTM D1243-95, Standard Test Method for Dilute Solution Viscosity of Vinyl Chloride Polymers, ASTM International, West Conshohocken, PA, 2000, www.astm.orgBack to Top