Ultrasonic Devulcanization of Precipitated Silica-Filled Silicone Rubber

Autor:	Sang E. Shim, A. I. Isayev
Rok vydání:	2001
Předmět:	Precipitated silica Materials science Polymers and Plastics Concentration effect Silicone rubber chemistry.chemical_compound Silicone Natural rubber chemistry visual_art Materials Chemistry visual_art.visual_art_medium Ultrasonic sensor Composite material
Zdroj:	Rubber Chemistry and Technology. 74:303-316
ISSN:	1943-4804 0035-9475
DOI:	10.5254/1.3544952
Popis:	This investigation involves the recycling of precipitated silica-filled silicone rubber using a continuous ultrasonic reactor. The processing conditions utilized in devulcanization of the filled systems were similar to those in our previous work on unfilled systems. Significant differences were observed in devulcanization of unfilled and filled systems. A decrease in gel fraction and crosslink density was sufficient for devulcanized silica-filled silicone rubber to be reprocessed and revulcanized. The cure behavior of silicone rubber and the mechanical properties of virgin, and revulcanized rubber were measured. Results showed that unfilled silicone rubbers gave no change in vulcanizate mechanical properties after revulcanization. However, in the filled rubbers there was a decrease in the mechanical properties of revulcanizates. In order to achieve an improvement in the properties, devulcanized filled rubbers were blended with virgin filled rubber in various proportions. The obtained results indicated a considerable enhancement of the performance characteristics of these blend vulcanizates.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ca8e06dd572c4b91232f480ce016e73a https://doi.org/10.5254/1.3544952 Zobrazit plný text záznamu