Thermal and thermo-oxidative degradation of poly(trimethylene oxide) and its complexes with NaCNS and LiClO4

Autor:	Luigi Costa, Maria Paola Luda, Giovanni Camino, G. Gordon Cameron, M.Y. Qureshi
Rok vydání:	1998
Předmět:	Reaction mechanism Polymers and Plastics Ethylene oxide Radical Condensed Matter Physics Homolysis Metal chemistry.chemical_compound chemistry Mechanics of Materials visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Thermal stability Formate Propylene oxide
Zdroj:	Polymer Degradation and Stability. 62:49-56
ISSN:	0141-3910
DOI:	10.1016/s0141-3910(97)00260-7
Popis:	The thermal degradation of poly(trimethylene oxide) (PTMO) shows many features common with its homologue poly(ethylene oxide) (PEO) and its isomer poly(propylene oxide) (PPO), the main degradation processes being accounted for by homolysis of CO (preferentially) and CC bonds of the backbone, followed by further reaction of the radicals so formed. Complexation with NaSCN slightly increases the PTMO thermal stability, possibly due to the mildly reducing effect of SCN−, in contrast to the usual destabilising effect of metal complexation, which makes the CO bonds of the backbone weaker. On the other hand, the formation of formate and ester groups in the PTMO-NaSCN complex in oxidative conditions is greatly slowed down in comparison to pure PTMO. The same mechanisms suggested for PEO and PPO complexes is invoked here to explain the thermo-oxidative stability of PTMO alkaline metal complexes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1603499b12241b29a26ace37fffc4820 https://doi.org/10.1016/s0141-3910(97)00260-7 Zobrazit plný text záznamu Full Text from ScienceDirect