ISO 12170-1996 PDF
Name in English:
St ISO 12170-1996
Name in Russian:
Ст ISO 12170-1996
Original standard ISO 12170-1996 in PDF full version. Additional info + preview on request
Full title and description
ISO 12170:1996 — Plastics — Polyethylene terephthalate (PET) — Determination of intrinsic viscosity of polycondensates by means of dilute-solution viscometry
Abstract
This International Standard specifies a method for the determination of the intrinsic viscosity (IV) of polyethylene terephthalate (PET) polycondensates by means of dilute-solution viscometry. The measured intrinsic viscosity is commonly used as an indicator of molecular weight and polymer quality for PET resins produced for fibres, films and moulding applications.
General information
- Status: Published standard (1996)
- Publication date: 1996
- Publisher: International Organization for Standardization (ISO)
- ICS / categories: 83.080 Plastics — Polyethylene terephthalate; general testing and characterization
- Edition / version: First edition (1996)
- Number of pages: Typically around 8–12 pages (standard short test method)
Scope
ISO 12170:1996 defines a laboratory procedure for determining the intrinsic viscosity of PET polycondensates by measuring the flow time of dilute solutions in a viscometer at a specified temperature and solvent. The method is intended for use with PET intended for fibres, film and moulding and gives guidance on sample preparation, solvents, concentrations, viscometer type, temperature control, calculation of intrinsic viscosity and reporting of results.
Key topics and requirements
- Preparation of PET test samples and purification where required.
- Selection of an appropriate solvent (commonly phenol/1,2-dichlorobenzene mixtures) and control of solution concentration to remain in the dilute regime.
- Use of capillary viscometers (Ubbelohde or comparable) and strict temperature control (usually 25 °C or as specified).
- Measurement of flow times for solvent and polymer solutions, and calculation of relative and intrinsic viscosity using standard equations.
- Calculation methods including specific viscosity, reduced viscosity and extrapolation to zero concentration to obtain intrinsic viscosity if multiple concentrations are used.
- Requirements for repeatability, reporting of experimental conditions, and expression of intrinsic viscosity in dL/g or mL/g.
Typical use and users
This standard is used by polymer laboratories, PET resin manufacturers, quality control and R&D departments in the plastics, textile and packaging industries, and testing laboratories that need to characterize PET molecular weight and ensure consistent product quality for fibres, films and molded articles.
Related standards
Other standards related to PET viscosity and molecular weight determination and to PET testing include ISO methods for intrinsic viscosity of polyesters, national and industry methods for PET (e.g., methods using different solvents or measurement temperatures), standards for melt flow rate, molecular weight characterization by gel permeation chromatography, and ISO standards covering physical testing of plastics and fibres.
Keywords
ISO 12170, polyethylene terephthalate, PET, intrinsic viscosity, IV, viscometry, dilute-solution viscometry, polymer characterization, molecular weight, capillary viscometer
FAQ
Q: What is this standard?
A: ISO 12170:1996 is an International Standard that specifies a method for determining the intrinsic viscosity of polyethylene terephthalate (PET) polycondensates by dilute-solution viscometry.
Q: What does it cover?
A: It covers sample preparation, solvent selection, viscometer type, measurement procedure, calculation of intrinsic viscosity and reporting requirements for PET resins used in fibres, films and moulding applications.
Q: Who typically uses it?
A: Polymer testing laboratories, PET resin producers, quality control and R&D teams in plastics, textile and packaging industries, and independent testing organizations.
Q: Is it current or superseded?
A: The document published in 1996 is the edition referenced as ISO 12170:1996. Users should check with the standards body for any later revisions or superseding standards before applying the method.
Q: Is it part of a series?
A: It is part of the family of ISO methods for plastics and polyester testing; other ISO standards address different test methods for polyesters, molecular-weight determination and related properties.
Q: What are the key keywords?
A: Polyethylene terephthalate, PET, intrinsic viscosity, viscometry, polymer characterization, IV, capillary viscometer.