ISO INTERNATIONAL STANDARD 17744 First edition 2004-11-15 Plastics Determination of specific volume as a function of temperature and pressure (pvT diagram) Piston apparatus method Plastiques Determination du volume specifique en fonction de la temperature et de la pression (diagramme pvT) - Methode utilisant un appareil a piston Reference number ISO 17744:2004(E) @ ISO 2004 ut license from IHS Not for Resale ISO 17744:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ?ISO2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's memberbody in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 4122 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland CopyightInternatinal organization for Standardization @ ISo 2004 - All rights reserved vithout license from IHS Not for Resale ISO 17744:2004(E) Contents Page Foreword Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Apparatus 6 Equipment calibration 7 Testsample 8 Procedure. 9 Expression of results. 10 10 Precision. 11 Test report... Annex A (normative) Sources of error when specific volume is measured as a function of temperature andpressure. .12 Annex B (informative) Examples of pvT diagrams. Bibliography 18 Copyrigh International Oorganization for standardizallon'ghts reserved ii from IHS Not for Resale ISO 17744:2004(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen non-governmental, in liaison with isO, also take part in the work. iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 17744 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical- chemicalproperties. onal Organization for Standardization @ISO 2004-All rights reserved Copyright I ISO 17744:2004(E) Introduction The characterization of changes in volume of plastics, as a function of temperature and pressure, is necessary for the purpose of simulation studies and for optimizing polymer processing (see References [7] to [12] in the Bibliography). In injection moulding, during the packing phase, most of the flow results from solidification. During It should be pointed out that, while all the techniques described hereafter are equivalent in their ability to characterize the melt state pvT behaviour, the isobaric cooling measurement is the only one whi