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Thermosets obtained by chemical modification of poly(epichlorohydrin) with vinyl‐terminated aromatic carboxylates
Author(s) -
Reina Jose Antonio,
Serra Angels,
Cádiz Virginia
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021970931
Subject(s) - epichlorohydrin , thermogravimetric analysis , polymer chemistry , chemistry , thermosetting polymer , differential scanning calorimetry , curing (chemistry) , radical initiator , benzoyl peroxide , thermal stability , organic peroxide , polymer , copolymer , organic chemistry , polymerization , physics , thermodynamics
Poly(epichlorohydrin) was modified in a high extent with several vinyl‐terminated aromatic potassium carboxylates (4‐(2‐propenyloxy)benzoate, 4‐(5‐hexenyloxy)benzoate, 3‐(2‐propenyloxy)‐2‐naphthoate, 3‐(5‐hexenyloxy)‐2‐naphthoate and 2‐(thioallyl)nicotinate) under solid‐liquid phase‐transfer conditions. Simultaneously with this substitution reaction, cleavage and crosslinking side reactions occurred. The polymers obtained were characterized by NMR, IR, elemental analysis, viscosimetry, size exclusion chromatography (SEC), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Then, crosslinked materials were obtained by curing mixtures of these linear polymers with 10% w/w of a radical initiator (dicumyl peroxide or 2,2′‐azoisobutyronitrile) on a DSC device. Finally, the thermal stability of the thermosetting materials was tested by TGA, and the Arrhenius kinetic parameters were determined for dicumyl peroxide initiated crosslinking processes by calorimetric measurements.