Polyacrylamide in water: molecular weight dependence of 〈R2〉 and [η] and the problem of the excluded volume exponent

François, Jeanne; Sarazin, D.; Schwartz, T.; Weill, G.

doi:10.1016/0032-3861(79)90194-0

Cited by 133 publications

(71 citation statements)

References 19 publications

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“…The viscosity becomes nonNewtonian, even at the lowest shear rate attainable in our experiments, at intrinsic viscosities higher than 430 cm3/g. In such cases, we have used the empirical law determined at finite gradient by Francois et al [7]. For lower values of the viscosity, we have used the following relationship proposed by the same authors [r/] = 9.33 x 10 -3 BT/~ zs cm3/g.…”

Section: Methodsmentioning

confidence: 99%

Polymerization of acrylamide in nonionic microemulsions: Characterization of the microlatices and polymers formed

Holtzscherer

Durand

Candau

1987

Colloid & Polymer Sci

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Free radical polymerization of acrylamide was carried out in nonionic microemulsions of water, an isoparaffinic oil, Isopar M and a blend of nonionic emulsifiers: a sorbitan sesquioleate and a polyoxyethylene sorbitol hexaoleate (HLB of the mixture: 9.3). The size and the stability of the latex particles formed after polymerization were studied as a function of monomer, emulsifier and electrolyte concentration. High emulsifier and high monomer contents favor obtaining high molecular weight polyacrylamides. It is shown that both the number of polymer chains contained in each latex particle and the size of the particles are essentially controlled by the acrylamide/emulsifier weight ratio.

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Section: Methodsmentioning

confidence: 99%

Polymerization of acrylamide in nonionic microemulsions: Characterization of the microlatices and polymers formed

Holtzscherer

Durand

Candau

1987

Colloid & Polymer Sci

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“…These dimensions agree with the radius of gyration values obtained by Francois et a1. 8 Some lower values of the observed diameter are probably caused by a decrease of the relative molecular mass due to chain shear produced by the agitation during the dissolving process. There are hydrogen bonds between the water molecules and the amide groups contained in a PAAm chain in the aqueous solution.…”

Section: Resultsmentioning

confidence: 99%

Crosslinked ribonucleic acid as seen in RNA/PAAm pseudo‐interpenetrating polymer networks by electron microscopy

Frisch

Xue

Chen

1993

J. Polym. Sci. A Polym. Chem.

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“…The viscosity-average molecular weight (M n ) of LPA was calculated from the following Mark-Houwink equation [38,39]:…”

Section: Characterizationmentioning

confidence: 99%

Novel quasi‐interpenetrating network/gold nanoparticles composite matrices for DNA sequencing by CE

et al. 2007

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In order to further improve ssDNA sequencing performances using quasi-interpenetrating network (quasi-IPN) as a matrix composed of linear polyacrylamide (LPA) with lower viscosity-average molecular mass (3.3 MDa) and poly(N,N-dimethylacrylamide) (PDMA), gold nanoparticles (GNPs) were prepared and added into this quasi-IPN to form polymer/metal composite sieving matrices. The studies of intrinsic viscosity and differential scanning calorimetry (DSC) on quasi-IPN and quasi-IPN/GNPs indicate that there were interactions between GNPs and polymer chains. The sequencing performances on ssDNA using quasi-IPN and quasi-IPN/GNPs (with different GNPs concentrations) as sieving matrices were studied and compared by CE at different temperatures. The results show that resolutions of quasi-IPN/GNPs were higher than those of quasi-IPN without GNPs and approximated those of quasi-IPN composed of LPA with higher MW (6.5 MDa) and PDMA without GNPs in the bare fused-silica capillaries. Furthermore, the sequencing time of quasi-IPN/GNPs was shorter than that of quasi-IPN under the same sequencing conditions. The influences of GNPs and sequencing temperature on the sequencing performances of ssDNA were also discussed. The separation reproducibility of quasi-IPN/GNPs solution was excellent and its shelf life was more than 8 months.

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Polyacrylamide in water: molecular weight dependence of 〈R2〉 and [η] and the problem of the excluded volume exponent

Cited by 133 publications

References 19 publications

Polymerization of acrylamide in nonionic microemulsions: Characterization of the microlatices and polymers formed

Polymerization of acrylamide in nonionic microemulsions: Characterization of the microlatices and polymers formed

Crosslinked ribonucleic acid as seen in RNA/PAAm pseudo‐interpenetrating polymer networks by electron microscopy

Novel quasi‐interpenetrating network/gold nanoparticles composite matrices for DNA sequencing by CE

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