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DOPO‐Based Phosphorus‐Containing Methacrylic (Co)Polymers: Glass Transition Temperature Investigation
Author(s) -
Bier Frédéric,
Six JeanLuc,
Durand Alain
Publication year - 2019
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201800645
Subject(s) - copolymer , substituent , polymer chemistry , methacrylate , glass transition , monomer , methyl methacrylate , polymer , materials science , methacrylic acid , chemistry , organic chemistry , composite material
A two‐step synthetic procedure is designed for preparing new flame‐retardant methacrylic monomers containing 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) as a substituent side group. DOPO and methacrylate moieties are linked by linear aliphatic hydrocarbon spacers (3 to 11 carbon atoms). Copolymerization with methyl methacrylate is carried out leading to copolymers containing between 2 and 10 wt% phosphorus. All homo‐ and copolymers exhibit a unique glass transition temperature ( T g ). A new group contribution for DOPO‐based substituent is extracted that leads to reasonable estimations of T g s of other published polymers. The Fox equation provides a good estimation of T g s for most copolymers and for physical blends of poly(methyl methacrylate) (PMMA) and DOPO. When using monomers having three and four carbon atoms in the hydrocarbon spacer, the T g of copolymers remains close to that of PMMA over a wide range of composition.