Wormlike micelles(WLMs)with polymerizable group were formed in aqueous solutions of cationic trimer surfactant di(2-hydroxyl-dimethylene ether)-α

ω

γ-triple(dimethylcetylammonium chlorine)

referred to as TrimerC16 by addition of sodium p-styrenesulfonate(NaSS).Then

styrene(St)monomer was solubilized into the hydrophobic core of the WLMs

presumably as the reactor for the polymerization reaction.The effect of polymerization temperature(Tp)and solubilization quantity of St on apparent viscosity(ηa)of the TrimerC16/NaSS/St polymerized system were studied with the viscosimetry method

and the properties of the solutions before and after polymerization were evaluated.The optimal molar concentration ratio of TrimerC16 to NaSS was 1/1.6

and the optimal Tp and solubilization quantity of St were 45℃ and 0.15 g

respectively.When shearing for 60 min at 170 s-1 shear rate in the range of heating from 70℃ to 100.5℃

ηa of the solutions after polymerization was 82.5 mPa·s.However

the ηa of the unpolymerized system without St decreased to 5 mPa·s after shearing for 30 min.When sand carrying ratio was 10%

sedimentation rates of seeds in the systems before and after polymerization were 0.385 cm·min-1 and 0.128 cm·min-1 at 50℃

respectively.Improved temperature and shear resistance

and sand carrying property of the polymerized system was due to the "lock-in" of WLMs microstructure by the polystyrene line produced in the micelles core and the TrimerC16-NaSS copolymer line bridged between core and shell.