Abstract
Several hybrid nanocomposites consisting of a magnesium dihydroxide (MDH) core and tethered poly(meth)acrylate chains were synthesized via atom transfer radical polymerization (ATRP). The hydroxyl groups on the surface of the MDH particles were modified by reaction with 2-bromopropionyl or 2-bromoisobutyryl bromide to attach ATRP initiator moieties to the particle. n-Butyl acrylate, methyl methacrylate, dodecyl methacrylate and octadecyl methacrylate were polymerized from the functionalized MDH particles using the “grafting-from” technique. MDH is a representative of flame retardants which release water when heated. The polymer chains attached to MDH particles will provide the composites with enhanced compatibility in blends with common polymers. The efficiency of attachment, and the molecular weights and polydispersity of the polymers attached to the nanoparticles were investigated by GPC and TGA after post-polymerization cleavage from the particles. AFM was used to analyze morphologies and structure of the composites.
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