Skip to content
Please enter a keyword to search

  • BS EN ISO 1628-5:2015

    Current The latest, up-to-date edition.

    Plastics. Determination of the viscosity of polymers in dilute solution using capillary viscometers Thermoplastic polyester (TP) homopolymers and copolymers

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  31-03-2015

    Publisher:  British Standards Institution

    Add To Cart

    Table of Contents - (Show below) - (Hide below)

    National foreword
    1 Scope
    2 Normative references
    3 Principle
    4 Solvents
    5 Apparatus
    6 Solvent and solution
    7 Procedure
    8 Expression of results
    9 Test report
    Annex A (informative) - Round-robin testing

    Abstract - (Show below) - (Hide below)

    Defines a method for the determination of the viscosity number (also referred to as 'reduced viscosity') of dilute solutions of thermoplastic polyesters (TPs) in certain specified solvents.

    Scope - (Show below) - (Hide below)

    This part of ISO1628 specifies a method for the determination of the viscosity number (also referred to as “reduced viscosityâ€??) of dilute solutions of thermoplastic polyesters (TPs) in certain specified solvents. The method is applicable to poly(ethylene terephthalate) (PET), poly(butylene terephthalate) (PBT), poly-(cyclohexylenedimethylene terephthalate) (PCT), and poly(ethylene naphthalate) (PEN), as well as to copolyesters and other polyesters, defined in ISO7792‑1 , that are soluble in one of the specified solvents under the specified conditions. The viscosity number is determined by the general procedure specified in ISO1628‑1 , observing the particular conditions specified in this part of ISO1628 . The determination of the viscosity number of a thermoplastic polyester provides a measure of the relative molecular mass of the polymer.

    General Product Information - (Show below) - (Hide below)

    Committee PRI/21
    Development Note Renumbers & supersedes BS ISO 1628-5. 2015 version incorporates corrigendum to BS ISO 1628-5. Also numbered as BS 2782-7.732E(1998). Supersedes BS 2782-7.732E(1991) and 95/125425 DC. (03/2015)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 3451-2:1998 Plastics Determination of ash Part 2: Poly(alkylene terephthalate) materials
    ISO 1628-1:2009 Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometers Part 1: General principles
    ISO 7792-1:2012 Plastics Thermoplastic polyester (TP) moulding and extrusion materials Part 1: Designation system and basis for specifications
    ISO 3105:1994 Glass capillary kinematic viscometers — Specifications and operating instructions
    View more information

    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective