Development of Novel Star-Like Branched-Chain Acrylamide (AM)-Sodium Styrene Sulfonate (SSS) Copolymers for Heavy Oil Emulsion Viscosity Reduction and Its Potential Application in... oleh Chunhua Zhao, Jian Zhang, Jianrong Lv, Bo Huang, Guang Yang, Engao Tang, Minggui Chen, Chenyu Xu, Yizhuo Ge