Effect of polar/nonpolar groups in comb-type copolymers on cold flowability and paraffin crystallization of waxy oils

- Comb-type poly(maleic alkylamide-co-α-octadecene) copolymers with various ratios of polar/nonpolar group were synthesized.
- Effects of copolymers on the cold flowability of waxy oils and crystallization of paraffins were studied.
- Copolymer with an appropriate ratio of polar/nonpolar group possesses the best effect on the flowability of waxy oils.
- Assembly model of comb-type copolymers interacting with paraffins and asphaltenes in crude oil was presented.