Abstract

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ISO 17744:2004 describes procedures for determining the specific volume of plastics as a function of temperature and pressure in both the molten and solid states.

The standard specifies the use of a piston-equipped apparatus in which the test sample, held in a measurement cell, is pressurized by means of the piston. Measurements under conditions of constant pressure or constant temperature can be made. In the constant-pressure mode, the maximum heating and cooling rates permissible are restricted to 5 °C/min.

By using these procedures, it is possible to obtain:

  • pvT diagrams that represent the relationship which exists between pressure, specific volume and temperature for a given material;
  • compressibility and volumetric thermal-expansion coefficients;
  • information on first-order and glass transitions as a function of temperature and pressure.


General information 

  • Status
     : Published
    Publication date
     : 2004-11
  • Edition
     : 1
    Number of pages
     : 18
  • Technical Committee
     : ISO/TC 61/SC 5 Physical-chemical properties
  • ICS
     :
    83.080.01 Plastics in general

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This standard contributes to the following Sustainable Development Goal

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