4-Vinylphthalic anhydride can be prepared from phthalic acid via bromination and subsequent olefination (Heck-reaction). Homo- and copolymerization with styrene was accomplished using AlBN as initiator. The copolymer compositions were determined by infrared-spectroscopy. The copolymerization parameters are r(S) = 0,15 and r(VPA) = 3,09, the corresponding Q, e values of 4-vinylphthalic anhydride are estimated as Q = 3,34 and e = 0,09. Despite the fact that the molecular weights were rather low as a consequence of the reaction contions, the glass transition temperatures rise with increasing VPA content. The homopolymer has a glass transition temperature in the order of 226-degrees-C.