The present invention relates to the formation of low volatile anhydride-containing aromatic vinyl polymers by polymerizing the half ester of the anhydride with a vinyl aromatic monomer followed by devolatilizing the half-ester and reforming the anhydride at elevated temperatures and reduced pressures.

 
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< Light source apparatus, lighting apparatus and projection display apparatus

< Mercury monitoring system and reaction chamber for enhancing conversion of elemental mercury gas into oxidized mercury

> Fluorescent lamps having desirable mercury consumption and lumen run-up times

> Emergency lighting system
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