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Changes in structure and in mechanical properties during the pyrolysis conversion of crosslinked polymethylsiloxane and polymethylphenylsiloxane resins to silicon oxycarbide glass

SYSNO ASEP	0448261
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Changes in structure and in mechanical properties during the pyrolysis conversion of crosslinked polymethylsiloxane and polymethylphenylsiloxane resins to silicon oxycarbide glass
Author(s)	Černý, Martin (USMH-B)_{RID, ORCID, SAI} Chlup, Zdeněk (UFM-A)_{RID, ORCID} Strachota, Adam (UMCH-V)_{RID, ORCID} Halasová, Martina (UFM-A) Rýglová, Šárka (USMH-B)_{RID, ORCID, SAI} Schweigstillová, Jana (USMH-B)_{RID, ORCID, SAI} Svítilová, Jaroslava (USMH-B) Havelcová, Martina (USMH-B)_{RID, ORCID}
Source Title	Ceramics International. - : Elsevier - ISSN 0272-8842 Roč. 41, č. 5 (2015), s. 6237-6247
Number of pages	11 s.
Publication form	Print - P
Language	eng - English
Country	GB - United Kingdom
Keywords	hardness ; silicon oxycarbide ; pyrolysis ; indentation modulus ; precursor
Subject RIV	JI - Composite Materials
Subject RIV - cooperation	Institute of Physics of Materials - Ceramics, Fire-Resistant Materials and Glass
R&D Projects	GAP107/12/2445 GA ČR - Czech Science Foundation (CSF)
Institutional support	USMH-B - RVO:67985891 ; UFM-A - RVO:68081723 ; UMCH-V - RVO:61389013
UT WOS	000353176300013
EID SCOPUS	84925355081
DOI	10.1016/j.ceramint.2015.01.034
Annotation	The subject of this study is the thermally induced conversion of cross-linked polymethylsiloxane and polymethylphenylsiloxane resins into inorganic silicon oxycarbide glass. This topic is studied in view of the changes in the chemical structure of the precursor and in the context of the changes in hardness and elasticity, pyrolysis weight losses, density changes, and sample shrinkage. Two aspects of the pyrolysis process were studied: i) the effect of the pyrolysis temperature (tested from 400 to 1000 degrees C) and the effect of pyrolysis time in cases of isothermal pyrolyses (at 520 degrees C and 650 degrees C). The mechanical properties were evaluated by means of micro-indentation tests, while the characterisation of the chemical structure was performed via FTIR spectroscopy, combustion analysis and EDS. The results of these experiments are discussed in the context of the use of examined materials as a precursor for the composite matrix or the sandwich core. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Workplace	Institute of Rock Structure and Mechanics
Contact	Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216
Year of Publishing	2016

Number of the records: 1