SIST EN ISO 1157:2000

Plastics - Cellulose acetate in dilute solution - Determination of viscosity number and viscosity ratio (ISO 1157:1990)

CEN/TC 249 Resolution 117 dated 2001-09-20 requests to withdraw this standard

Kunststoffe - Celluloseacetat in verdünnter Lösung - Bestimmung der Viskositätszahl und des Viskositätsverhältnisses (ISO 1157:1990)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der Viskositätßahl und des Viskositätsverhältnisses von Celluloseacetat in verdünnter Lösung in einem Gemisch von Dichlormethan und Methanol fest. Das Verfahren ist nur für Celluloseacetat mit einem Essigsäuregehalt von mindestens 50% anwendbar.

Plastiques - Acétate de cellulose en solution diluée - Détermination de l'indice de viscosité et du rapport de viscosité (ISO 1157:1990)

Polimerni materiali - Razredčena raztopina acetata celuloze - Določanje viskoznostnega števila in viskoznostnega razmerja (ISO 1157:1990)

General Information

• Status: Withdrawn
• Publication Date: 30-Apr-2000
• Withdrawal Date: 31-Mar-2007
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 01-Apr-2007
• Due Date: 01-Apr-2007
• Completion Date: 01-Apr-2007
• Ref Project: EN ISO 1157:1999 - Plastics - Cellulose acetate in dilute solution - Determination of viscosity number and viscosity ratio (ISO 1157:1990)

Relations

• Replaces: SIST ISO 1157:1996 - Plastics -- Cellulose acetate in dilute solution -- Determination of viscosity number and viscosity ratio
• Effective Date: 01-May-2000

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.RþDQMHKunststoffe - Celluloseacetat in verdünnter Lösung - Bestimmung der Viskositätszahl und des Viskositätsverhältnisses (ISO 1157:1990)Plastiques - Acétate de cellulose en solution diluée - Détermination de l'indice de viscosité et du rapport de viscosité (ISO 1157:1990)Plastics - Cellulose acetate in dilute solution - Determination of viscosity number and viscosity ratio (ISO 1157:1990)83.080.20PlastomeriThermoplastic materialsICS:Ta slovenski standard je istoveten z:EN ISO 1157:1999SIST EN ISO 1157:2000en01-maj-2000SIST EN ISO 1157:2000SLOVENSKI
STANDARD



SIST EN ISO 1157:2000



SIST EN ISO 1157:2000



SIST EN ISO 1157:2000



SIST EN ISO 1157:2000



SIST EN ISO 1157:2000



INTERNATIONAL STANDARD ISO 1157 Second edi tion 1990-11-15 -_ Plastics - Cellulose acetate in dilute solution - Determination of viscosity number and viscosity ratio Plastiques - Acetate de cellulose en solution diluke - Uefet-minatiorl de I’indice de viscosife et du rapport de viscosite ---m-p- ---_ Reference number ISO 1157: 199O(E) SIST EN ISO 1157:2000



ISO 1157:1990(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 1157 was prepared by Technical Committee ISOITC 61, Plastics. This second edition cancels and replaces the first edition (ISO 1157:1975), of which it constitutes a minor revision. 0 ISO 1990 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronie or mechanical, including photocopying and microfilm, without Permission in writing from the publisher. International Orga nization for Stand ardization Case Postale 56 l CH-121 1 Geneve 20 l Switzerland Printed in Switzerland ii SIST EN ISO 1157:2000



INTERNATIONAL STANDARD ISO 1157:1990(E) Plastics - Cellulose acetate in dilute solution - Determination of viscosity number and viscosity ratio WARNING - The use of this International Standard may involve hazardous materials, operations and equipment. This Standard does not Purpott to address all of the safety Problems associated with its use. lt 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. 1 Scope This International Standard specifies a method for determining the viscosity number and viscosity ratio of cellulose acetate in dilute Solution in a mixture of dichloromethane and methanol. The method applies to cellulose acetate with not less than 50 % acetic acid yield. 2 Normative reference The following Standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the edition indicated was valid. All Standards are subject to revision, and Parties to agreements based on this International Standard are encour- aged to investigate the possibility of applying the most recent edition of the Standard indicated below. Members of IEC and ISO maintain registers of cur- rently valid International Standards. ISO 1628-1:1984, Guidelines for the standardization of methods for fhe determination of viscosity number and limiting viscosity number of polymers in dilute solution - Part 1: General conditions. 3 Definitions For the definition of viscosity number, and for other terms, definitions and formulae, see ISO 1628-1. 4 Principle The times of flow of a solvent and of a Solution of cellulose acetate at a concentration of 5 mg/ml in that solvent are measured at 25 ‘C by conventional methods. The viscosity number and ratio are calcu- lated from these measurements and from the known concentration of the Solution. Density differente and kinetic energy corrections are small in this method and are not applied. 5 Solvents During the determination, use only solvents of re- cognized analytical grade. 5.1 Dichloromethane, &i 1,321 to 1,331, not less than 95 % by volume distilling between 39 “C and 40,5 “C at a pressure of 1013 mbar (760 mmHg). SAFETY PRECAUTIONS - Dichloromethane is harmful by inhalation. Avoid contact with the skin. 5.2 Methanol, & 0,792 to 0,795, distillation range 64,5 “C to 65,5 “C at a pressure of 1013 mbar (760 mmHg). SAFETY PRECAUTIONS - Methanol is highly flammable and toxic by inhalation or if swallowed. Keep the Container tightly closed and away from sources of ignition. DO not smoke. Avoid contact with the skin. 6 Apparatus Ordinary
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