Ethylene chloride refractive index

Copolymers present a double problem in GPC it is difficult to define an appropriate calibration method and compositional heterogeneity can alter detector responses. For these reasons quantitative studies of copolymers are rare although Janca et al. have published an extensive study of the behaviour of vinyl acetate-vinyl chloride copolymers. Elgert and Wohlschiess have used a combination of refractive index and ultraviolet detection to study compositional heterogeneity in copolymers of a-methyl styrene with butadiene. Studies of ethylene-propylene copolymers have been reported by Osawa and Inaba. ... 

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