BS-ISO-1628-5-1998 BS-2782-7-METHOD-732E-1998.pdf
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1、BRITISH STANDARD BS ISO 1628-5:1998 BS 2782-7: Method 732E:1998 Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometers Part 5: Thermoplastic polyester (TP) homopolymers and copolymers ICS 83.080.10; 83.080.20 Licensed Copy: sheffieldun sheffieldun, na, Mon
2、 Nov 27 08:08:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 1628-5:1998 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 June 1998 BSI 04-1999 I
3、SBN 0 580 29969 4 National foreword This British Standard reproduces verbatim ISO 1628-5:1998 and implements it as the UK national standard. It supersedes BS 2782-7:Method 732E:1991 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/21, Testing of pl
4、astics, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and pro
5、mulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the
6、section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applicat
7、ion. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, page ii, pages 1 to 7 and a back cover. This standard has been updated (see copyright
8、date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:08:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 1628-5:1
9、998 BSI 04-1999i Contents Page National forewordInside front cover Forewordiii 1Scope1 2Normative references1 3Principle1 4Solvents1 5Apparatus2 6Solvent and solution2 7Procedure3 8Expression of results4 9Test report4 Annex A (informative) Round-robin testing5 Figure A.1 Viscosity number of PET in p
10、henol/1,2-dichlorobenzene (50/50) relative to that in other solvents6 Figure A.2 Viscosity number of PBT in m-cresol relative to that in other solvents7 Table A.15 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:08:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheff
11、ieldun sheffieldun, na, Mon Nov 27 08:08:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:08:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 1628-5:1998 ii BSI 04-1999 Foreword ISO (the International Organization for Standardization) is a w
12、orldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented
13、on that committee. International organizations, governmental 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 adop
14、ted 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. International Standard ISO 1628-5 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC
15、9, Thermoplastic materials. This second edition cancels and replaces the first edition (ISO 1628-5:1986), which has been technically revised. ISO 1628 consists of the following parts, under the general title Plastics Determination of the viscosity of polymers in dilute solution using capillary visco
16、meters: Part 1: General principles; Part 2: Poly(vinyl chloride) resins; Part 3: Polyethylenes and polypropylenes; Part 4: Polycarbonate (PC) moulding and extrusion materials; Part 5: Thermoplastic polyester (TP) homopolymers and copolymers; Part 6: Methyl methacrylate polymers. Annex A of this part
17、 of ISO 1628 is for information only. Descriptors: Plastics, homopolymers, copolymers, polyester resins, soluble matter, viscosity, tests, determination, viscosity index, viscosity measurement. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:08:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
18、 BS ISO 1628-5:1998 BSI 04-19991 1 Scope This part of ISO 1628 specifies 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. The method is applicable to poly(ethylene ter
19、ephthalate) (PET), poly(butylene terephthalate) (PBT), poly-(cyclohexylenedimethylene terephthalate) (PCT), and poly(ethylene naphthalate) (PEN), as well as to copolyesters and other polyesters, defined in ISO 7792-1, that are soluble in one of the specified solvents under the specified conditions.
20、The viscosity number is determined by the general procedure specified in ISO 1628-1, observing the particular conditions specified in this part of ISO 1628. The determination of the viscosity number of a thermoplastic polyester provides a measure of the relative molecular mass of the polymer. 2 Norm
21、ative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 1628. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO
22、 1628 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of current valid International Standards. ISO 1628-1:, Plastics Determination of the viscosity of polymers in dilute solution using cap
23、illary viscometers Part 1: General principles1). ISO 3105:1994, Glass capillary kinematic viscometers Specifications and operating instructions. ISO 3451-2:1984, Plastics Determination of ash Part 2: Polyalkylene terephthalates. ISO 7792-1:1997, Plastics Thermoplastic polyester (TP) moulding and ext
24、rusion materials Part 1: Designation system and basis for specifications. 3 Principle The times of flow of a solvent and a solution of resin in the solvent at a concentration of 0,005 g/ml are measured at 25 C by conventional methods. The viscosity number is calculated from these measurements and fr
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