Thermal aging of molding compounds

Conference Paper (2010)
Author(s)

K.M.B. Jansen (TU Delft - Computational Design and Mechanics)

J de Vreugd (TU Delft - Computational Design and Mechanics)

LJ Ernst (TU Delft - Computational Design and Mechanics)

C Bohm (External organisation)

Research Group
Computational Design and Mechanics
More Info
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Publication Year
2010
Language
English
Research Group
Computational Design and Mechanics
Pages (from-to)
778-780
ISBN (print)
978-1-4244-8140-8

Abstract

The mechanical properties of polymer encapsulating materials change considerably when packages are exposed to elevated temperatures for longer times. Here we report a systematic study on the change in viscoelastic properties of a commercial molding compound which is stored at 175°C for periods of time ranging up to 4 weeks. It is shown that instead of the expected degradation, the modulus and the glass transition
temperature increased and that these effects are accompanied with a relatively large amount of shrinkage. All effects can be interpreted in terms of the formation of an oxidized layer where extra crosslinking occurred.

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