ASTM-D2857 2001

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D2857-95(2001) Standard Practice for Dilute Solution Viscosity of Polymers

Published By	Publication Date	Number of Pages
ASTM	2001	6

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Categories: 83.080.01 - Plastics in general, ASTM

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Description

ASTM D2857-95-Reapproved2001

Historical Standard: Standard Practice for Dilute Solution Viscosity of Polymers

ASTM D2857

Scope

1.1 This practice covers the determination of the dilute solution viscosity of polymers. There are several ASTM standards (Test Methods D789, D1243, D1601, and D4603, and Practice D3591) that describe dilute solution viscosity procedures for specific polymers, such as nylon, poly(vinyl chloride), polyethylene, and poly(ethylene terephthalate). This practice is written to augment these standards when problems arise with which the specific procedure is not concerned, or when no standard is available for the polymer under investigation.

1.2 This practice is applicable to all polymers that dissolve completely without chemical reaction or degradation to form solutions that are stable with time at a temperature between ambient and 150°C. Results are usually expressed as relative viscosity (viscosity ratio), inherent viscosity (logarithmic viscosity number), or intrinsic viscosity (limiting viscosity number) (see 3.1).

1.3 For polyamides, relative viscosity values by this procedure are not equivalent to those determined by Test Methods D789.

1.4 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 1—This standard and ISO 1628, “Plastics-Determination of Viscosity Number and Limiting Viscosity Number,” are technically equivalent.

Keywords

flow and flow rate—thermoplast; polymers—molecular weight; viscosity—dilute-solution; viscosity—intrinsic; viscosity—plast

ICS Code

ICS Number Code 83.080.01 (Plast in general)

DOI: 10.1520/D2857-95R01

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Practice Significance and Use Apparatus
3	Reagents and Materials Sample Preparation Procedure
4	Calculation Report Precision and Bias FIG. 1
5	Keywords X1. RECOMMENDED SOLVENTS AND SOLUTION CONCENTRATIONS X1.2 Polycarbonate X1.3 Poly(Methyl Methacrylate) X1.4 Poly(Vinyl Chloride)

Additional information

Standard Title	D2857-95(2001) Standard Practice for Dilute Solution Viscosity of Polymers
Published Code	ASTM
Publication Date	2001
Pages Count	6
ICS Codes	83.080.01 - Plastics in general