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Liquid Silicone Rubber Foamed with Thermoplastic Expandable Microspheres

Marl, Svenja
Giesen, Ralf-Urs
Heim, Hans-Peter

To reduce the material costs as well as the density of Liquid Silicone Rubber (LSR), LSR foams can be produced in an injection molding process. Expandable thermoplastic microspheres can be used as blowing agents. This publication deals with the analysis of the cell structure of these LSR foams. For this purpose, cylindrical disks are injection molded and examined for their cell structure as a function of different proportions of microspheres using a scanning electron spectroscope. In addition, the density of the samples is determined. It was found that a very homogeneous cell structure is produced in this process, that heat transport has a significant influence on the expansion of the microspheres, and that the formation of a filler network limits the expansion at higher proportions of blowing agent.

Sponsor
Gefördert durch den Publikationsfonds der Universität Kassel
Citation
In: Materials Volume 15 / Issue 11 (2022-05-25) , S. ; eissn:1996-1944
Collections
@article{doi:10.17170/kobra-202208296775,
  author    ={Marl, Svenja and Giesen, Ralf-Urs and Heim, Hans-Peter},
  title    ={Liquid Silicone Rubber Foamed with Thermoplastic Expandable Microspheres},
  keywords ={660 and Siliconkautschuk and Flüssigkautschuk and Thermoplast and Kostensenkung and Spritzgießen and Kunststoffverarbeitung and Treibmittel and Füllstoff},
  copyright  ={http://creativecommons.org/licenses/by/4.0/},
  language ={en},
  journal  ={Materials},
  year   ={2022-05-25}
}