Effect of inorganic salts on viscosity of acrylonitrile‐<i>N</i>‐vinylpyrrolidone copolymer solutions

Hou, Chen; Wang, Chengguo; Liang, Ying; Cai, Hua‐Su

doi:10.1002/app.12501

Cited by 8 publications

(1 citation statement)

References 4 publications

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“…Firstly, the larger molecular weight of a polymer indicates that more segments are contained in a polymer chain, and the polymer chain is more likely to slip between the chains when moving. Therefore, more energy needs to be consumed during the shearing process to overcome the synergy between the chains [42,43]. Secondly, the increase in molecular weight of the polymer also enhances the probability of entanglement and thus leads to greater flow resistance and eventually increases the shear viscosity [44].…”

Section: Microstructure Evolution Of Polymer Chains In Dra-kerosene S...mentioning

confidence: 99%

Effect of Polymer Drag Reducer on Rheological Properties of Rocket Kerosene Solutions

Guo

Chen²,

Zhou

et al. 2022

Materials

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Adding drag reduction agent (DRA) to rocket kerosene is an effective way to reduce the pipeline resistance of rocket kerosene transportation systems. However, so far, there have been few research reports on the effect of DRA on the rheological properties of rocket kerosene solution, especially from a microscopic perspective. In this study, coarse-grained molecular dynamics simulations were conducted to investigate the rheological properties of rocket kerosene solutions with DRAs of different chain lengths and concentrations. The results showed that the viscosity of DRA—kerosene solution is generally higher than that of pure kerosene at a low shear rate, while with an increase in shear rate, the viscosity of DRA—kerosene solution decreases rapidly and finally tends to become similar to that of pure kerosene. The shear viscosity of DRA—kerosene solution increases with an increase in chain length and concentration of polymers. Through observing the morphologic change of DRA molecules and analyzing the radius of gyration and the mean-squared end-to-end distance of polymers, it was confirmed that the rheological properties of DRA—kerosene solutions are strongly related to the degree of entanglement of polymer chains. The simulation results provide microscopic insights into the rheological behavior of DRA—kerosene solutions and clarify the intrinsic relation between the morphologic change of polymer molecules and the rheological properties of DRA—kerosene solutions.

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Section: Microstructure Evolution Of Polymer Chains In Dra-kerosene S...mentioning

confidence: 99%

Effect of Polymer Drag Reducer on Rheological Properties of Rocket Kerosene Solutions

Guo

Chen²,

Zhou

et al. 2022

Materials

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Rheological kinetics of acrylonitrile–acrylamide copolymer solutions in dimethyl formamide

Hou

Liang

et al. 2005

J of Applied Polymer Sci

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Viscosity behavior of dimethyl formamide solutions of acrylonitrile-acrylamide copolymer is discussed. The rheological kinetics of the solutions was studied for contrast. It is shown that the solutions behave the same as Newtonian flow as the rotor speed goes beyond 6 revolutions min Ϫ1 . With an increase of temperature, the apparent viscosity of acrylonitrile-acrylamide copolymer solutions shows a decreasing trend. The changes of the apparent flow-activation energy of solutions calculated by Arrhenius equation become less prominent along with the changes of the molecular weight of acrylonitrile-acrylamide copolymers. The apparent flow-activation energy of the copolymer solutions increases continuously with an increase of copolymer concentration. The viscosity of copolymer solutions decreases continuously at concentrations of KCl and NaCl up to 0.02 mol L Ϫ1 and then increases. The apparent flowactivation energy of acrylonitrile-acrylamide copolymer solutions shows an obvious trend of decrease with addition of alkali salts and the changes of the apparent flow-activation energy of solutions containing NaCl are more prominent than those of solutions containing KCl.

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Rheological kinetics of acrylonitrile/amino ethyl‐2‐methyl propenoate copolymer solutions in dimethyl sulfoxide

Hou

et al. 2006

J of Applied Polymer Sci

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Viscosity behavior of dimethyl sulfoxide solutions of acrylonitrile (AN)/amino ethyl-2-methyl propenoate (AEMP) copolymer was discussed. Rheological kinetics of the solutions was studied in contrast. It is shown that the solutions behave the same as Newtonian flow as the rotor speed goes beyond 12 rpm. With an increase of temperature, the apparent viscosity of AN/AEMP copolymer solutions shows a trend of decrease. The changes of the apparent flow activation energy of solutions calculated by Arrhenius equation become less prominent along with the changes of the molecular weight of AN/AEMP copolymers. The apparent flow activation energy of the copolymer solutions increases continuously with an increase of copolymer concentration. The viscosity of copolymer solutions decreases continuously as the concentrations of KCl and NaCl up to 0.02 mol L Ϫ1 , and then it increases. the apparent flow-activation energy of AN/AEMP copolymer solutions shows an obvious trend of decrease with addition of alkali salts and the changes of the apparent flow-activation energy of solutions containing NaCl are more prominent than those of solutions containing KCl.

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Effect of inorganic salts on viscosity of acrylonitrile‐N‐vinylpyrrolidone copolymer solutions

Cited by 8 publications

References 4 publications

Effect of Polymer Drag Reducer on Rheological Properties of Rocket Kerosene Solutions

Effect of Polymer Drag Reducer on Rheological Properties of Rocket Kerosene Solutions

Rheological kinetics of acrylonitrile–acrylamide copolymer solutions in dimethyl formamide

Rheological kinetics of acrylonitrile/amino ethyl‐2‐methyl propenoate copolymer solutions in dimethyl sulfoxide

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