Stabilization of filled polysiloxane elastomers to cyclic stress at elevated temperature through use of zinc oxide fillers

✍ Scribed by Susan A. Visser

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 216 KB
• Volume: 64
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970523)64:8<1499::aid-app7>3.0.co;2-c

✦ Synopsis

The susceptibility of filled polysiloxane elastomers to cyclic stress at elevated temperatures is investigated. It is shown that zinc oxide fillers, unlike other fillers examined previously, can produce filled elastomers with remarkable stability to combined mechanical and thermal stresses. The influences of filler concentration, diphenylsiloxane incorporation, and molecular weight between network crosslinks are examined. The data demonstrate that the elastomer stability to cyclic stress at elevated temperature increases with increasing filler content and does not correlate with diphenylsiloxane content. It is suggested that chemical interactions between the polysiloxane network and the filler surfaces control the response to cyclic stress at elevated temperature and that the response strongly depends on the type of filler selected.