Temperature cycling effects in some glob top polymer materials
- 1 December 1998
- journal article
- Published by Emerald in Circuit World
- Vol. 24 (4), 11-24
- https://doi.org/10.1108/03056129810223927
Abstract
Three common glob top encapsulant materials, two epoxy‐based, and one silicone‐based, were characterized prior to temperature cycling using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic mechanical spectroscopy (DMS), gas chromatograph‐mass spectrometry (GC‐MS), and Fourier transform infrared spectroscopy (FTIR). After cycling between ‐55 to +125°C, for 1,000 cycles, the same samples were again analysed using DMS and FTIR. For the epoxy‐based samples, the DMS results indicated that temperature cycling in a humid environment can seriously affect the physical and mechanical properties of these samples. FTIR data also indicated that the molecular changes in the epoxy‐based samples appeared quite extensive after cycling, indicating a high level of degradation on the molecular scale. On the other hand, the silicon‐based glob top appeared to have survived the temperature cycling quite well.Keywords
This publication has 6 references indexed in Scilit:
- Effect of water on the properties of epoxy matrix and compositePublished by Springer Science and Business Media LLC ,1985
- Fourier‐transform infrared study of the reversible interaction of water and a crosslinked epoxy matrixJournal of Polymer Science: Polymer Physics Edition, 1981
- Irreversible effects of moisture on the epoxy matrix in glass‐reinforced compositesJournal of Polymer Science: Polymer Physics Edition, 1981
- The reinforcement mechanism of fiber‐glass reinforced plastics under wet conditions: A reviewPolymer Engineering & Science, 1978
- The Infra-red Spectra of Complex MoleculesPublished by Springer Science and Business Media LLC ,1975
- ENVIRONMENTAL FACTORS IN THE DESIGN OF COMPOSITE MATERIALSPublished by Elsevier BV ,1970