The poly(styrene-co-maleic anhydride))(SMA) was modified by some fluorescent organic molecules such as 2-amino-benzimidazol

4-amino-antipyrine and 4-amino-N-(2

4-dimethylphenyl)-1

8-naphthalimide to prepare the fluorescent polymers (SMI)．The FT-IR spectra of these polymers show a new carbonyl characteristic peak in imide ring appeared at 1722 cm-1 and no amino group characteristic peaks appeared at 3300～3500 cm-1.That is to say the chemical modification of SMA is successful．GPC and DSC results of the polymers obtained show that although the molecular weight of these polymers decreased a little in the chemical modification process

the thermal stability of these polymers was improved．On the other hand the fluorescence of these polymers can be quenched by the acidity because of the alkalescence of the organic heteroring containing nitrogen．These novel polymers can emit strong fluorescence and kept the excellent properties of SMA too．This is a convenient method to produce the fluorescent materials．