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Synthesis and properties of polyurethane macroazo initiators
Author(s) -
Cheikhalard Talal,
Massardier Valérie,
Tighzert Lan,
Pascault Jean Pierre
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971220158
Subject(s) - polyurethane , thermogravimetric analysis , polycaprolactone , thermal decomposition , kinetics , polymer chemistry , condensation polymer , methylene , materials science , decomposition , polyester , chemistry , organic chemistry , composite material , polymer , physics , quantum mechanics
The synthesis of a typical polyurethane macroazo initiator (PUMAI) based on 2, 2'‐azobis(2‐cyanopropanol) (ACP), α, ω‐hydroxy polycaprolactone (PCL) and 4, 4'‐methylene diphenyl diisocyanate (MDI) occurs in a two stage polycondensation procedure. Kinetics of the reaction between ACP and a monoisocyanate (para‐tolylisocyanate, p‐TI), and the reaction between MDI and PCL were carried out. Reaction rates were determined by a suggested kinetic model. Thermal decomposition of PUMay compared to other azo initiators has been investigated. The kinetic and thermal parameters associated with these initiators were determined by thermogravimetric analysis (TGA).