Thermal analysis of plastics

Determination of crystalline melting behaviour by differential scanning calorimetry (DSC). DSC analysis is a technique in which the heat flow rate (power) to the sample is monitored against time or temperature, whilst the temperature rise of the sample is programmed. When the sample undergoes a transition, such as melting, a much greater heat flow is recorded.Thermal analysis of plastic

To erase the effects of the previous thermal history of the specimen (in order to obtain an unambiguous material identification), a second thermal cycle is performed.

Pira uses a TA Instruments DSC 2929 Modulated DSC instrument covering the temperature range -30°C to +350°C. Typical DSC applications include the determination of polymer melting points, glass transition point and crystallinity. It is one of a suite of test methods used by Pira to analyse plastic film structures.

Applicable standards are detailed in BS EN ISO 11357.

Thermal analysis of plastic

Expert Profile

  • Doug joined Pira in 1989 and has 20 years experience in the physical testing of packaging and packaging materials. He heads a team specialising in packaging and print related technical investigations. In 2004 Doug gained his postgraduate degree with distinction in Packaging Technology from Brunel University.

    Doug Leatherdale
    Doug Leatherdale

    Head of Physical Testing

    Pira International

    +44 1372 80 2108

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