Water-soluble acrylamide copolymers. VI. Preparation and characterization of poly[N,N-dimethylacrylamide-co-acrylamide] and control polyacrylamides

Water-soluble acrylamide copolymers. VII. Preparation and characterization of poly(methacrylamide-co-acrylamide)

“…1 Filtration difficulties for the pH 10 standards prevented accurate measurement of ͗r g ͘ values under basic conditions. At pH 4.0 and 10.0, ͗r g ͘ values for PAM from control-6 (complementary to MeAM-co-AM-6) agreed within the statistical uncertainty of the MALLS technique (Table VI).…”

“…1 Homopolymerizations of acrylamide (AM) and copolymerizations of acrylamide with methacrylamide (MeAM) were all conducted under UHP nitrogen (Ͻ5 ppm O 2 ; Linde). Microanalyses were performed by Canadian Microanalytical Service Ltd., Vancouver.…”

“…1 For each copolymer sample, 100 scan files containing 20 scans per file were averaged, and the spectrum for carbon black was subtracted from each copolymer spectrum. 13 C NMR spectra were obtained for the monomers from solutions of 120 -150 mg of monomer in 10 mL of D 2 O. Spectra for the copolymers MeAM-co-AM-2b to -5 and the controls complementary to MeAM-co-AM-6 were taken from solutions containing 30 -100 mg of the dried, dialyzed polymer and 60 mg of NaCl in 10 mL of D 2 O.…”

“…1 One factor examined is the effect of the size of a bulky substituent and its proximity to the backbone of a polyacrylamide on the polymer chain extension in aqueous solutions. The first phase involved the synthesis and characterization of a series of representative homopolymers and copolymers.…”

“…1 This article continues the project description with the same information determined for a series of poly(methacrylamide-coacrylamide) copolymers (eq 1). Details of these experiments and the results follow:…”