The ultrasonic degradation of hydroxyethyl cellulose (HEC) and poly(ethylene oxide) (PEO) in aqueous solution

and copolymerization of HEC with PEO were studied respectively. The structure of the copolymer was identified by DTA

IR

MS

X-ray diffraction and polarizing microscope and the copolymer prepared is a block one mainly. The copolymer

formed by irradiating 0.5% HEC/PEO aqueous solution for a period of 10 min. at 25℃ and 18.2 kHz with 2.5 A input current on reversed main circuit

amounts to 55.07%.