Thermal and photodegradation of MnO2-, NaBO3- and organic hydroperoxide-cured polysulfides: products and pathways
UNSPECIFIED. (1998) Thermal and photodegradation of MnO2-, NaBO3- and organic hydroperoxide-cured polysulfides: products and pathways. POLYMER DEGRADATION AND STABILITY, 62 (1). pp. 187-198. ISSN 0141-3910Full text not available from this repository.
The thermal and photodegradation of a number of linear polysulfides (LP) H(SC2H4OCH2OC2H4S)(n)H, cured using inorganic (MnO2, NaBO3) and organic (t-butyl hydroperoxide or TBHP) curatives, have been studied by H-1 and C-13 NMR spectroscopy, IR spectroscopy and electrospray ionisation mass spectrometry (ESI). We have found that cured-LPs degrade thermally and photochemically by two main parallel pathways namely (i) a free radical autoxidation mechanism and (ii) a hydrolysis mechanism. The nature of the curative used determines the principal pathway, thus LP blocks cured using TBHP degrade predominantly by the hydrolysis mechanism, while LPs cured using MnO2 and NaBO3 degrade almost exclusively via the free radical autoxidation route. (C) 1998 Elsevier Science Limited. All rights reserved.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||POLYMER DEGRADATION AND STABILITY|
|Publisher:||ELSEVIER SCI LTD|
|Number of Pages:||12|
|Page Range:||pp. 187-198|
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