A high salt tolerance and low adsorption drag reducer based on non-covalent enhancement |
MA Yingxian,ZHU Zhi,GUO Jianchun,ZHOU Han,LI Jia,XIONG Yujia,MA Leyao |
Fig. 2. Structure and part of 1H-NMR spectrogram of DN drag reducer. 1-9 are the proton numbers and a—e are the monomer numbers. |