ISO 1628-1:2024 PDF

Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 1: General principles

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Title (English):

ISO 1628-1:2024

Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 1: General principles

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 23
Publication date:: December 2, 2024
Edition:: ISO IS 1628 edition 5 version 1
ICS:: 83.080.01

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Description (English):

This document specifies the general conditions for the determination of the reduced viscosity, intrinsic viscosity and K‑value of organic polymers in dilute solution. It specifies the standard parameters that are applied to viscosity measurement. This document is applicable to develop standards for measuring the viscosities in solution of individual types of polymer. It is also applicable to measure and report the viscosities of polymers in solution for which no separate standards exist.

Technical details

Technical committee: ISO/TC 61/SC 5 - Physical-chemical properties
SKU: ISO 1628-1:2024

Abstract

Overview

ISO 1628-1:2024 defines the general principles for determining the viscosity of organic polymers in dilute solution using capillary viscometers. The standard covers measurement and reporting of reduced viscosity, intrinsic viscosity and K‑value, and specifies the standard parameters, apparatus and procedural conditions to obtain reproducible viscosity data. It applies both to development of polymer-specific measurement standards and to routine viscosity reporting when no dedicated standard exists.

Keywords: ISO 1628-1, viscosity of polymers, capillary viscometers, intrinsic viscosity, reduced viscosity, K-value.

Key Topics

Measurement methods
- Method A - Efflux time method: uses a capillary-tube viscometer to compare efflux times of solvent and polymer solution. The standard notes the Poiseuille/Hagenbach relation and treats kinetic-energy corrections as negligible when below 3% of solvent viscosity.
- Method B - Differential pressure method: a two-capillary relative viscometer measures differential pressures for solvent and solution under forced flow; designed for easier automation and reduced solvent use.
Apparatus and preparation
- Specifications for viscometers and supporting instrumentation for both efflux-time and differential-pressure approaches.
- Guidance on solution preparation and recommended concentration ranges for dilute-solution measurements.
Measurement conditions
- Controlled temperature of measurement, attention to solvent and solution densities (document notes limits such as density differences

Related standards

Mentioned in the description and other ISO standards

Overview

Keywords: ISO 1628-1, viscosity of polymers, capillary viscometers, intrinsic viscosity, reduced viscosity, K-value.

Key Topics

Measurement methods
- Method A - Efflux time method: uses a capillary-tube viscometer to compare efflux times of solvent and polymer solution. The standard notes the Poiseuille/Hagenbach relation and treats kinetic-energy corrections as negligible when below 3% of solvent viscosity.
- Method B - Differential pressure method: a two-capillary relative viscometer measures differential pressures for solvent and solution under forced flow; designed for easier automation and reduced solvent use.
Apparatus and preparation
- Specifications for viscometers and supporting instrumentation for both efflux-time and differential-pressure approaches.
- Guidance on solution preparation and recommended concentration ranges for dilute-solution measurements.
Measurement conditions
- Controlled temperature of measurement, attention to solvent and solution densities (document notes limits such as density differences

ISO 1628-1:2024 PDF

Technical details

Abstract

Overview

Key Topics

Related standards

Abstract

Overview

Key Topics

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