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Abstract The present work involves three sections: I- Preparation of some resins of expected fire retardant properties such as thiourea-formaldehyde resin (TUF) based on a polycondensation reaction between thiourea (TU) and formaldehyde (F) in alkaline niedia. Preparation of unsaturated polyester (PE) resins (containing halogen) based on the polyesterification reaction between phthalic or tetrabromophthalic anhydride, maleic anhydride and ethylene glycol, then the prepared (PE) resins admixed with 30 Wt.% of styrene (St) monomer. Preparation of N methacryloyloxyphthalirnjde ~IvW), N methacryloyloxytefrabrornophthaljn,jde (NMTP) through the reaction of N-hydroxyphthalirnide or N-hydroxytetrabromophthal. irnide with methacryloyl chloride in presence of triethylarnine (Et3N) or with methacrylic acid in presence of N,N~ -dicyclohexyl carbodiimide (DCCI). Then the prepared vinyl monomers were copolymerized with methylmethacrylate (IVR~4A) monomer bji solution polymerization in presence of benzoyl peroxide (Bz202) as ma free-radical initiator. m2- Impregnating and coating the white pine wood with the prepared resins, monomer mixtures and co-polymers, to give wood polymer composites. |