Page 25 - Solutions for Plastic Evaluation

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Thermal Characteristics Product Evaluation

Thermal Analysis

Measurement of Thermal Expansion Process in Epoxy Resin Using a TMA
In this example, the thermal expansion
process in epoxy resin was measured. Plastic Materials Evaluation of
The results show a change in the
thermal expansion coefficient at about
90°C. This is due to the glass transition
of the epoxy resin. Therefore, because
material characteristics change at
that point, it is necessary to know
what that temperature is. Glass Raw Materials Evaluation of
transition can also be measured using
other methods, such as DSC, but
thermomechanical analyzers (TMA)
allow measuring the point where
mechanical characteristics of the
material change.

Measurement of Shrinkage Behavior in PE Film Using a TMA Product Evaluation
Two types of PE film were heated
under tension. The measurement
results indicate that the films began
shrinking above 100°C and then
began stretching above 150°C. The
figure shows that the two types of Product Information
film shrank at different temperatures.
In the tension mode, the strain during
shrinking can be measured as well.

Various TMA Measurement Modes
The Shimadzu TMA-60 includes three
measurement modes – expansion,
tension, and penetration, which can
be freely changed depending on
the sample shape and objectives.
Changing modes is extremely easy,
too.

Expansion Mode Tension Mode Penetration Mode

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