What is ISO 11357-2about?
ISO 11357-2 is the second part of the multi-series ISO 11357.
ISO 11357-2 specifies methods for the determination of the glass transition temperature and the step height related to the glass transition of amorphous and partially crystalline plastics.
Who is ISO 11357-2 for?
ISO 11357-2 on the determination of glass transition temperature and step height is useful for:
- Plastic manufacturing industries
- Plastic testing institution
Why should you use ISO 11357-2?
Differential Scanning Calorimetry (DSC) is a thermal analysis technique in which the heat flow into or out of a sample is measured as a function of temperature or time, while the sample is exposed to a controlled temperature program. When an amorphous polymer is heated, the temperature at which the polymer structure turns “viscous liquid or rubbery" is called the Glass Transition Temperature. Partial crystalline plastic is incompletely or imperfectly crystalline.
ISO 11357-2 provides the required guidance on conducting the DSC method to determine the glass transition temperature and step height, including apparatus and materials used, test specimens, test conditions, and specimen conditions and test procedures.
ISO 11357-2 specifies a method DSC that determines the number of characteristics properties of a sample the properties which affect the quality level and performance of the product to build confidence in end-users and improve their goodwill in the market.
What’s changed since the last update?
BS EN ISO 11357-2:2020 supersedes ISO 11357-2:2013. BS EN ISO 11357-2:2020 includes some technical changes with respect to ISO 11357-2:2013. These include:
- Revision of the definition of glass transition step height
- Correction of the unit of glass transition step height
- Assessment of methods for determination of Tg
- Revision of rounding of Tg
- Strong restriction of re-using crucibles
