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Robust and transparent membrane of crystalline silicone via a melt-drawing technique

A melt-drawing technique was applied to crystalline silicone, poly(tetramethyl-p-silphenylenesiloxane) (PTMPS) containing a rigid phenylene ring in the main chain. The resultant melt-drawn membrane had double-melting endotherms located at the usual 130 °C and the higher temperature of 160 °C. The hi... Full description

Contained in: Journal of Materials Chemistry C Vol. 2, No. 2 (2014), p. 373-381
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Links: Additional Link (dx.doi.org)
ISSN: 2050-7534
Additional Keywords: HOCHTEMPERATUR
KRISTALLSTRUKTUR
MEMBRAN
MOLEKUELHAUPTKETTE
PHENYLEN
SCHMELZTEMPERATUR
SILICON:POLYMER
SILICONKAUTSCHUK
STRUKTURANALYSE
ZUGFESTIGKEIT
DOI: 10.1039/c3tc31265h
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 9 Seiten, 65 Quellen
ID (e.g. DOI, URN): 10.1039/c3tc31265h
PPN (Catalogue-ID): WTI056331754
Note: WTI TEMA DB
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520 |a A melt-drawing technique was applied to crystalline silicone, poly(tetramethyl-p-silphenylenesiloxane) (PTMPS) containing a rigid phenylene ring in the main chain. The resultant melt-drawn membrane had double-melting endotherms located at the usual 130 °C and the higher temperature of 160 °C. The higher melting temperature for PTMPS is expected, but has not been experimentally observed. A series of in situ structural analyses during heating also reveal that it is attributed to the melting of the extended chain crystals within the melt-drawn PTMPS membrane. Due to the highly oriented crystalline structure, the obtained melt-drawn PTMPS membrane is transparent but exhibits an excellent tensile modulus and strength of 2 GPa and 20 MPa, which are a few hundred times greater than those of commercial silicone elastomers. 
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