Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0040-6031(01)00644-X
Title: Studies on the thermal stability of F- and non-F-containing ladder polyepoxysilsesquioxanes by TGA-FTIR
Authors: Wang, J.
He, C.
Lin, Y.
Chung, T.S. 
Keywords: Cleavage
Fluorinated
Ladder polyepoxysilsesquioxanes
Oxidation
TGA-FTIR
Issue Date: 3-Jan-2002
Source: Wang, J., He, C., Lin, Y., Chung, T.S. (2002-01-03). Studies on the thermal stability of F- and non-F-containing ladder polyepoxysilsesquioxanes by TGA-FTIR. Thermochimica Acta 381 (1) : 83-92. ScholarBank@NUS Repository. https://doi.org/10.1016/S0040-6031(01)00644-X
Abstract: The thermal stability of non-F- (LPS-I) and F- (LPS-II) containing ladder polyepoxysilsesquioxanes under air and nitrogen was studied by DSC, TGA and TGA-FTIR techniques. The thermally curing temperature for LPS-II is about 20°C higher than that for LPS-I. Both LPS-I and LPS-II exhibits higher thermal stability under air and nitrogen as observed from TGA, where the decomposition temperatures at 5 and 10% weight loss were above 425 and 480°C, respectively. Under nitrogen, the higher decomposition temperature and residue from TGA was attributed to the gradual cleavage of C-Si and C-C bonds and high stability of F-containing side-chains (non-broken). Because of the weight gain from the oxidation of silsesquioxanes (RSiO3/2) to silica (SiO2), and gradual cleavage of F-containing side-chains, LPS-II exhibits higher decomposition temperature under air environment than under nitrogen. These phenomena detected from TGA could be observed directly from TGA-FTIR stack plots. As combined techniques for the evolved gas analysis, TGA-FTIR played an important role in explaining the phenomena of degradation related to the change of polymer chain structures during heating. © 2002 Elsevier Science B.V. All rights reserved.
Source Title: Thermochimica Acta
URI: http://scholarbank.nus.edu.sg/handle/10635/92352
ISSN: 00406031
DOI: 10.1016/S0040-6031(01)00644-X
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

15
checked on Feb 14, 2018

WEB OF SCIENCETM
Citations

15
checked on Jan 23, 2018

Page view(s)

31
checked on Feb 19, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.