title: Fluorescence probe studies on the complexation between poly(methacrylic acid) and poly(N, N-diethylacrylamide).
abstract: The complexation between poly(methacrylic acid) (PMAA) and poly(N, N-diethylacrylamide) (PDEAM) in aqueous phase was studied by UV-vis and fluorescence probe techniques. It was demonstrated that the complexation of PMAA with PDEAM occurs within a pH range of 1-6.5 and along with the complexation, the conformation of PMAA changed from a hypercoiled to a loose coiled form. The complex ratio between the two polymers is 1:1 (PMAA:PDEAM, in monomer unit). Salt effect studies showed that the complexation occurred due to formation of hydrogen bonds between the two polymers. Based upon these conclusions and the "compact micelle-like structure" for PMAA at low pH, a "ladder" model was proposed for the structure of PMAA-PDEAM complex formed at low pH.
authors.affiliation: School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, PR China.
authors.forename: Shouxin
authors.initials: S
authors.lastname: Liu
authors.forename: Yu
authors.initials: Y
authors.lastname: Fang
authors.forename: Gailing
authors.initials: G
authors.lastname: Gao
authors.forename: Mingzhu
authors.initials: M
authors.lastname: Liu
authors.forename: Daodao
authors.initials: D
authors.lastname: Hu
mesh_terms: D000178:Acrylamides / Q000737:chemistry* / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D011108:Polymers / Q000737:chemistry* / Q000378:metabolism*; D011109:Polymethacrylic Acids / Q000737:chemistry* / Q000378:metabolism*; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry
chemical_list: D000178:Acrylamides; D011108:Polymers; D011109:Polymethacrylic Acids; C428028:poly(N,N-diethylacrylamide); C030613:polymethacrylic acid