Journal of Industrial and Engineering Chemistry, Vol.59, 50-55, March, 2018
Monomer composition effects on thermal properties of transparent poly(methyl methacrylate-co-isobornyl methacrylate-co-cyclohexyl maleimide) terpolymers
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Terpolymers based on methyl methacrylate (MMA), isobornyl methacrylate (IBOMA) and N-cyclohexyl
maleimide (ChMI) were synthesized by conventional free-radical solution copolymerization. The mole
fraction of all polymers was characterized by elemental analysis and 1H NMR spectroscopy. The thermal
and thermomechanical properties of all polymer series having different comonomer compositions were
investigated by DSC, TGA, DMTA and TMA. The results showed improved heat resistance characteristics,
in which both the glass transition and decomposition temperatures of the terpolymers were heightened
with increasing IBOMA and ChMI comonomer content, due to their bulky pendent group and rigid imide
ring structure. Furthermore, the dynamic mechanical properties as well as dimensional stability of the
terpolymers increased with a higher IBOMA and ChMI content without sacrificing a high transparency of
pure PMMA.
Keywords:Methyl methacrylate;Isobornyl methacrylate;N-Cyclohexyl maleimide;Terpolymer;Heat-resistance
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