Thermal properties of ethyl α-hydroxymethylacrylate-methyl methacrylate copolymers

Autor:	M. C. Fernández-Monreal, Enrique López Madruga, Marta Fernández-García, Rocío Cuervo-Rodríguez
Rok vydání:	1994
Předmět:	chemistry.chemical_classification Ethanol Materials science Polymers and Plastics Organic Chemistry Intermolecular force chemistry.chemical_compound chemistry Intramolecular force Polymer chemistry Materials Chemistry Copolymer Methanol Methyl methacrylate Glass transition Lactone
Zdroj:	Polymer. 35:4474-4478
ISSN:	0032-3861
DOI:	10.1016/0032-3861(94)90112-0
Popis:	The degradation and glass transition temperatures of a series of methyl methacrylate (MMA)-ethyl α-hydroxymethylacrylate (EHMA) copolymers have been studied by t.g.a./i.r. and d.s.c. Thermal degradation yielded intramolecular lactone and intermolecular crosslinking formation, with concurrent loss of ethanol and/or methanol involving adjacent or near-neighbour EHMA or MMA units. Glass transitions of copolymers have been analysed as a function of sequence distribution and their values compared to the theoretical ones derived using Johnston's equation. The partially degraded copolymers increased their glass transition temperatures as a consequence of the above mentioned lactone and crosslinking formation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2bba78f703e1384de86cf17bbe8549e5 https://doi.org/10.1016/0032-3861(94)90112-0 Zobrazit plný text záznamu