NBN ISO 17744:2025

< p class=" MsoBodyText" > < span lang=" EN-GB" > This document describes procedures for determining the specific volume of plastics as a function of temperature and pressure in both the molten and solid states.< / span>

< p class=" MsoBodyText" > < span lang=" EN-GB" > This document 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.< / span>

< p class=" Note" > < span lang=" EN-GB" > NOTE< span style=" mso-tab-count: 1 " >             < / span> For the acquisition of data needed for processing design, the isobaric cooling method is found to be more useful, see ISO 17282. The result of this measurement cannot be used directly for injection-moulding simulation.< / span>

< p class=" MsoBodyText" > < span lang=" EN-GB" > This document is used to obtain:< / span>

< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >      < / span> < / span> < / span> < !--[endif]--> < em style=" mso-bidi-font-style: normal " > < span lang=" EN-GB" > pvT< / span> < / em> < span lang=" EN-GB" > diagrams that represent the relationship which exists between pressure, specific volume and temperature for a given material < / span>

< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >      < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > volumetric compressibility and volumetric thermal-expansion coefficients < / span>

< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >      < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > information on first-order and glass transitions as a function of temperature and pressure.< / span>