Authors: Guixia Wang Yuxi Zhang Feipeng Wu
Publish Date: 2011/03/06
Volume: 29, Issue: 3, Pages: 352-359
Abstract
A series of cationic surfmers with benzyl groups QARBCs with different R groups on the benzene ring were synthesized and characterized by IR 1HNMR 13CNMR The aggregation of QARBCs was studied by the steadystate fluorescence technique It turned out that QARBCs had surface activity and their critical micelle concentration CMC values varied in the range of 10−2–10−3 mol/L with slight increase with temperature The copolymerization of acrylamide M1 and QARBCs M2 was studied below and above CMC their reactivity ratios were determined by the FinemannRoss method It was found that below CMC copolymerization took place in a homogeneous system and reactivity ratios of acrylamide and QARBCs were less than 1 while above CMC reactivity ratios of QARBCs were greater than 1 The copolymerization mechanism of QARBC was observed to be similar to that of micellar polymerization QARBCs tended to homopolymerization which gave rise to microblocky sequences in the polymer backbone The Q and e values of QARBCs were calculated according to the AlfreyPrice equation by using r 1 AM and r 2 QARBC Samples of polyAMcoQARBC were prepared above and below CMC and their hydrophobic associations were studied by the steadystate fluorescence spectra and 2D NOESY spectra and their critical associating concentrations CAC were estimated The results showed that samples of polyAMcoQARBC prepared above CMC had stronger hydrophobic association in aqueous solution than those prepared below CMC
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