Mechanical Properties and Toughening of a Polymethylsilsesquioxane Network

Autor:	Bizhong Zhu, Dimitris E. Katsoulis, Frederick J. McGarry, Gregg Alan Zank
Rok vydání:	1999
Předmět:	Materials science business.industry Atmospheric temperature range Microbiology Toughening Viscoelasticity Silsesquioxane chemistry.chemical_compound Fracture toughness Brittleness chemistry Microelectronics Composite material business Curing (chemistry)
Zdroj:	MRS Proceedings. 594
ISSN:	1946-4274 0272-9172
DOI:	10.1557/proc-594-257
Popis:	Polysilsesquioxanes are finding wider uses in microelectronics. However these materials are brittle and their mechanical behaviors need to be better understood. In this paper the mechanical properties of a cured methyl silsesquioxane network are studied and they are found to vary strongly with curing conditions. In the investigated curing temperature range there seems to be a correlation between the fracture toughness (KIc) and the viscoelastic transitions, which are affected by the network crosslink density. A higher crosslink density suppresses the cc and β transitions and reduces the KIc. A toughening approach is designed and its applicability is demonstrated by the increased fracture toughness.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a85b8898f6e6fd9ba6cea7a45bedaf8d https://doi.org/10.1557/proc-594-257 Zobrazit plný text záznamu Full text from SpringerLink