Synthesis and characterization of poly(diallyldimethylammonium chloride) in a broad range of molecular weight

Abstract

Poly(diallyldimethylammmonium chloride) samples were prepared in a wide range of molecular weight by radical polymerization at low degree of conversion to realize undisturbed molecular weight distributions. Determination of the molecular and thermodynamic parameters by viscometry, osmometry, light scattering, gel permeation chromatography (GPC) and analytical ultracentrifugation (AUC) give acceptable agreement. The high values of the second virial coefficient would result in a corresponding excluded volume. However, the dependencies of the radius of gyration and the second virial coefficient on molecular weight do not reflect the excluded volume effect. The discrepancy can be explained by a dominating Donnan contribution. Taking into account the polydispersities of the samples, a Kuhn segment length of 5 nm was determined for poly(diallyldimethylammonium chloride) in 0.5 M NaCl solutions. [η]‐M relations were obtained for 1 M NaNO3, 1 M NaCl and 0.5 M NaCl solutions.

Nonstoichiometric polymer-surfactant complexes obtained in a lamellar lyotropic medium

“…Table 1 summarizes the data corresponding to the characterization of the polymers. The intrinsic viscosity was calculated by Huggins and Kraemer extrapolations, and the viscous molecular weight average was calculated by using the Mark-Houwink equation [43] with the exponent a00.83 and the constant K04.7×10 −3 dL/g. The viscosity average molecular weight is usually lower than the weight average molecular weight; therefore, the values obtained agree with the data provided by the producers.…”

Formation of polyelectrolyte multilayers on fibres: Influence on wettability and fibre/fibre interaction

“…Determining the dn/dc of PDADMAC without the addition of NaCl produced a value of 0.1756, which is to be compared with an earlier repeated value of 0.176 at 0.5 M NaCl [22]. The dn/dc of PSS was 0.23 [23], a value that can also be assumed to be independent of the electrolyte concentration.…”

Response of Polyelectrolyte Complexes to Subsequent Addition of Sodium Chloride: Time‐Dependent Static Light Scattering Studies

“…As polycations, we selected a poly(diallyldimethylammonium chloride) (PDAD-MAC) sample (M w ¼ 200 000 g/mol, M w =M n ¼ 1.5, M e ¼ 161.5 g/mol, dn/dc w ¼ 0.190 mL/g), [22] which was freshly prepared, and a copolymer [23] (Cop47) of diallyldimethylammonium chloride and acrylamide with 47 mol-% of cationic groups (M w ¼ 1.44 Â 10 6 g/mol, M w =M n ¼ 2.7, M e ¼ 241 g/mol, dn/dc w ¼ 0.180 mL/g). NaCl was used as supplied by Sigma (sample of high purity).…”