Nonionic surfactants based on copolymers of dioctyl itaconate with dioxypropylated itaconic acid

摘要

Four series of nonionic copolymer surfactants have been prepared by the free radical copolymerizations of dioctyl itaconate (DOI) with dioxyproylated itaconic acid. Copolymerization reactions were carriedout in solution at 70 deg C using 1 mol. percent azopisisoputyronitrile as a free radical initiator. The copolymers were obtained by reprecipitation fromperoeum ether (40-60) and finaly dried in vacuum at 60 deg C. The structural features of these nonionic copolymer surfactants have been confirmed by IR and ~1 HNMR spectra. The surface active properties of these polymers were compared and evaluated including solubility, coud point, surface properties, interfacial tesnion, forming emulsification and biodegradability. Most of the products are good biodegradable surfactants; which manifested the importance of their application in pollution problems.