Thermo-Associative and Salt-Associative Graft Copolymers of Surfactant Macromonomers and Acrylamide: Synthesis and Solution Properties in Dilute Aqueous Solutions |
| |
| Authors: | Weihong Long Ming Duan Shenwen Fang Liehui Zhang Linyu Li Ya Hui Tian |
| |
| Affiliation: | 1. School of Chemistry and Chemical Engineering , Southwest Petroleum University , Chengdu , Sichuan , China;2. 8 Xindu Avenue, Xindu District , Chengdu , Sichuan , 610500 , P. R. China;3. State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation , Southwest Petroleum University , Chengdu , Sichuan , China;4. State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation , Southwest Petroleum University , Chengdu , Sichuan , China |
| |
| Abstract: | Three new surfactant macromonomers (SMM) with different ethylene oxide (EO)/propylene oxide (PO) ratios (for SMM1, SMM2, and SMM3, the EO/PO ratios were 1:0.5, 1:0.9, and 1:1.25, respectively) were synthesized by the reaction between PEO-PPO di-block polymers having terminal tertiary amine groups and chloropropene. Graft copolymers of acrylamide and SMM (PAM-g-SMM) were prepared with different SMMs and grafting densities in water, and the products were confirmed by FTIR and elemental analysis. Owing to the strong hydrophobicity of the graft, the PAM-g-SMM3 was not water soluble. However, PAM-g-SMM1 and PAM-g-SMM2 aqueous solutions had good surface activity and their surface tensions were 44.26 and 37.63 mN/m at a concentration of 1000 mg/L, respectively. In general, in diluted graft PAM solutions, the copolymer predominantly formed intrapolymeric associates. The PAM-g-SMM2 was both thermo-associative and salt-associative in dilute solution. For PAM-g-SMM2, when the temperature and salt concentration increased, interpolymeric aggregations were formed. |
| |
| Keywords: | macromonomers surfactant thermoassociative polymer |
|
|
