Properties and influence of hydrophobically associating polyacrylamide modified with 2-phenoxylethylacrylate

Abstract

The properties of hydrophobically associating copolymer P(acrylamide (AM)/2-phenoxylethylacrylate (POEA)), composed of acrylamide and a small amount of POEA (≤ 1.0 mol.%) as hydrophobe, were investigated in aqueous solution under various conditions. The results showed that the solution properties were strongly affected by the microstructure of copolymer. The copolymers (BP series) with hydrophobic microblocky structure exhibited large viscosity enhancement due to the inter-molecular hydrophobic association, while that did not occur for the random copolymers (RP series). The hydrophobic association thickening behaviors were also remarkably dependent on the number and length of the hydrophobic block in polymer chain. Nonlinear viscosity relationship was found as increasing hydrophobe content and SMR (surfactant/hydrophobic monomer molar ratio), and a maximum appeared at the middle position as a result of the competitive effect between inter- and intra- molecular hydrophobic associations. Solution properties were further studied as a function of the polymer concentration, salinity, temperature and shear rate. The block copolymers show high salt tolerance and shear thinning as well as recovery after shear.

References

1. Selb J Candau F Iner- and intra- molecularaggregation of associating polymers in waterIn: Glass J EAssociatie Polymers in AqueousMedia, ACS Symposium Series 765Washington, DCAmerican ChemicalSociety 2000 95108
2. Annable T Buscall R Ettelaie R Rheology of transient networks formed by the associationof hydrophobically modified water soluble polymersIn: Alexandridis PLindman BAmphiphilic Block Copolymers, Self-assembly and ApplicationsAmsterdamElsevier 2000 281304
3. Hashidzume A Noda T Morishima Y Stimuli-responsive associative behavior polyelectrolyte –boundnonionic surfanctant moieties in aqueous mediaIn: McCormick C LStimuli-Responsive WaterSoluble and Amphiphilic Polymers, ACS Symposium Series 780Washington, DCAmerican Chemical Society 2001 1437
4. Molchanov V S Philippova O E Khokhlov A R et al.Self-assembled networks highly responsive to hydrocarbonsLangmuir 2007 23(1)105111
5. Miquelard-Garnier G Demoures S Creton C et al.Synthesis and rheological behavior of new hydrophobicallymodified hydrogels with tunable propertiesMacromolecules 2006 39(23)81288139
6. Kujawa P Audibert-Hayet A Selb J et al.Effect of ionic strength on the rheological propertiesof multisticker associative polyelectrolytesMacromolecules 2006 39(1)384392
7. Biggs S Hill A Selb J et al.Copolymerization of acrylamide and an hydrophobicmonomer in an aqueous micellar medium: effect of the surfactant onthe copolymer microstructureThe Journalof Physical Chemistry 1992 96(3)15051511
8. Chang Y H McCormick C L Water-soluble copolymers. 49.Effect of the distribution of the hydrophobic cationic monomer dimethyldodecyl(2-acrylamidoethyl)ammoniumbromide on the solution behavior of associating acrylamide copolymersMacromolecules 1993 26(22)61216126
9. Regalado E J Selb J Candau F Viscoelastic behavior of semidilute solutions of multistickerpolymer chainsMacromolecules 1999 32(25)85808588
10. Candau F Selb J Hydrophobically-modified polyacrylamidesprepared by micellar polymerizationAdvancesin Colloid and Interface Science 1999 79(2–3)149172
11. Regalado E J Selb J Candau F Phase behavior and rheological properties of aqueous solutionscontaining mixtures of associating polymersMacromolecules 2000 33(23)87208730
12. Evani S EurPatent, 57 875 1982
13. Evani S USPatent, 4 432 881 1984
14. Hill A Candau F Selb J Properties of hydrophobically associating polyacrylamides:influence of the method of synthesisMacromolecules 1993 26(17)45214532
15. Ezzell S A Hoyle C E Creed D et al.Water-soluble copolymers. 40. Photophysical studiesof the solution behavior of associative pyrenesulfonamide-labeledpolyacrylamidesMacromolecules 1992 25(7)18871895
16. Branham K D Shafer G S Hoyle C et al.Water-soluble copolymers. 61. Microstructural investigationof pyrenesulfonamide-labeled polyelectrolytes. Variation of labelproximity utilizing micellar polymerizationMacromolecules 1995 28(18)61756182
17. Volpert E Selb J Candau F Associating behaviour of polyacrylamides hydrophobicallymodified with dihexylacrylamidePolymer 1998 39(5)10251033
18. Volpert E Selb J Candau F Influence of the hydrophobe structure on composition, microstructure,and rheology in associating polyacrylamides prepared by micellar copolymerizationMacromolecules 1996 29(5)14521463
19. Turner S R Siano D B Bock J US Patent, 4 520 182 1985
20. Turner S R Siano D B Bock J US Patent, 4 528 348 1985
21. Dai Y H Wu F P Li M Z et al.A novel hydrophobically associating copolymer ofacrylamide/2-phenoxyethyl acrylate, synthesis and propertiesActa Polymerica Sinica 2003 4525529 (in Chinese)
22. Biggs S Selb J Candau F Copolymers of acrylamide/N-alkylacrylamide in aqueous solution:the effects of hydrolysis on hydrophobic interactionsPolymer 1993 34(3)580591
23. Hwang F S Hogen-Esch T E Effects of water-soluble spacerson the hydrophobic association of fluorocarbon-modified poly(acrylamide)Macromolecules 1995 28(9)33283335
24. McCormick C L Nonaka T Johnson C B Water-soluble copolymers. 27 Synthesis and aqueous solutionbehaviour of associative acrylamide/N-alkylacrylamide copolymersPolymer 1988 29(4)731739
25. Xie X Y Hogen-Esch T E Copolymers of N,N-dimethylacrylamideand 2-(N-ethylperfluorooctanesulfonamido)ethylacrylate in aqueous media and in bulk. Synthesis and propertiesMacromolecules 1996 29(5)17341745