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Aqueous solutions of HEC and hmHEC: effects of molecular mass versus hydrophobic associations on hydrodynamic and thermodynamic parameters. (2016)
Journal Article
Vadodaria, S. S., & English, R. J. (2016). Aqueous solutions of HEC and hmHEC: effects of molecular mass versus hydrophobic associations on hydrodynamic and thermodynamic parameters. Cellulose, 23(2), 1107-1121. https://doi.org/10.1007/s10570-016-0861-x

Aqueous solutions of amphiphilic polymers usually comprise of inter- and intramolecular associations of hydrophobic groups often leading to a formation of a rheologically significant reversible network at low concentrations that can be identified... Read More about Aqueous solutions of HEC and hmHEC: effects of molecular mass versus hydrophobic associations on hydrodynamic and thermodynamic parameters..

Extensional rheometry of cellulose ether solutions: flow instability (2015)
Journal Article
Vadodaria, S. S., & English, R. J. (2015). Extensional rheometry of cellulose ether solutions: flow instability. Cellulose, 23(1), 339-355. https://doi.org/10.1007/s10570-015-0838-1

Capillary breakup extensional rheometry of semi-dilute hydroxyethyl cellulose (HEC) solutions was performed under several step-stretch conditions. The resulting parameters, i.e. terminal steady state extensional viscosity (gE) and the timescale f... Read More about Extensional rheometry of cellulose ether solutions: flow instability.

Second virial coefficient of rod-shaped molecules and molecular dynamics simulations of the isotropic phase (2015)
Journal Article
Heyes, D. M., Turner, P., English, R. J., Williams, R., & Brańka, A. C. (2015). Second virial coefficient of rod-shaped molecules and molecular dynamics simulations of the isotropic phase. Physical Review E, 91(4), 042134-042144. https://doi.org/10.1103/physreve.91.042134

The second virial coefficient, B 2 is computed of linear rigid rods composed of m equally spaced sites interacting with sites on other rods via the hard-sphere or Weeks-Chandler-Andersen (WCA) pair potentials. The dependence of B 2 on a wide ran... Read More about Second virial coefficient of rod-shaped molecules and molecular dynamics simulations of the isotropic phase.

The water vapor sorption behavior of a galactomannan cellulose nanocomposite film analyzed using parallel exponential kinetics and the Kelvin-Voigt viscoelastic model. (2013)
Journal Article
Keating, B. A., Hill, C. A. S., Sun, D., English, R., Davies, P., & McCue, C. (2013). The water vapor sorption behavior of a galactomannan cellulose nanocomposite film analyzed using parallel exponential kinetics and the Kelvin-Voigt viscoelastic model. Journal of Applied Polymer Science, 129, 2352-2359. https://doi.org/10.1002/app.39132

Nanocomposite films have been developed where a galactomannan (guar) matrix was reinforced with cellulose nanowhiskers and plasticized using sorbitol. The properties of these films were compared with films made from guar only. The films were examined... Read More about The water vapor sorption behavior of a galactomannan cellulose nanocomposite film analyzed using parallel exponential kinetics and the Kelvin-Voigt viscoelastic model..

Small strain deformation measurements of konjac glucomannan solutions and the influence of borate cross-linking (2013)
Journal Article
Ratcliffe, I., Williams, P. A., English, R., & Meadows, J. (2013). Small strain deformation measurements of konjac glucomannan solutions and the influence of borate cross-linking. Carbohydrate Polymers, 95(1), 272-281. https://doi.org/10.1016/j.carbpol.2013.02.024

The dynamic rheology of aqueous solutions of konjac glucomannan has been evaluated over a range of concentrations up to 2.35%, and the effect of borate cross-linking of such solutions evaluated in the range 0.02-40 mM borate. In preliminary work, con... Read More about Small strain deformation measurements of konjac glucomannan solutions and the influence of borate cross-linking.

Increasing the extensional viscosity of silicone oil reduces the tendency for emulsification (2010)
Journal Article
Williams, R. L., Day, M., Garvey, M. J., English, R., & Wong, D. (2010). Increasing the extensional viscosity of silicone oil reduces the tendency for emulsification. RETINA, 30, 300-304. https://doi.org/10.1097/IAE.0b013e3181babe0c

Purpose: The purpose was to study the emulsification of silicone oil tamponade agents that cause clinical complications. This study aimed to increase the emulsification resistance of silicone oil 1,000 to be at least as resistant as silicone oil 5,00... Read More about Increasing the extensional viscosity of silicone oil reduces the tendency for emulsification.

Shear and extensional rheometry of PDMS tamponade agents used in vitroretinal surgery. (2008)
Conference Proceeding
Day, M., Blanchard, R., English, R., Dobbie, T., Williams, R. L., Garvey, M. J., & Wong, D. (2008). Shear and extensional rheometry of PDMS tamponade agents used in vitroretinal surgery.

The emulsification of low molar mass silicone oil (PDMS)-based tamponade agents used in the treatment of complex retinal detachments is a significant clinical problem leading to the patient suffering impairment of vision whilst the tamponade is in pl... Read More about Shear and extensional rheometry of PDMS tamponade agents used in vitroretinal surgery..

Simulations and experiments of self-associating telechelic polymer solutions (2008)
Journal Article
Cass, M. J., Heyes, D. M., Blanchard, R., & English, R. J. (2008). Simulations and experiments of self-associating telechelic polymer solutions. Journal of physics. an Institute of Physics journal. Condensed matter, 20(33), 335103. https://doi.org/10.1088/0953-8984/20/33/335103

A Brownian dynamics computer simulation study of a highly coarse-grained model of telechelic associating polymers has been carried out. In a critical concentration range the model produces the so-called 'loops-to-bridges' transition, thought to exist... Read More about Simulations and experiments of self-associating telechelic polymer solutions.

The influence of the extensional viscosity of very low concentrations of high molecular mass water-soluble polymers on atomisation and droplet impact (2008)
Journal Article
Williams, P. A., English, R. J., Blanchard, R. L., Rose, S. A., Lyons, L., & Whitehead, M. (2008). The influence of the extensional viscosity of very low concentrations of high molecular mass water-soluble polymers on atomisation and droplet impact. Pest management science, 64(5), 497-504. https://doi.org/10.1002/ps.1523

BACKGROUND: Water-soluble polymers are increasingly added to herbicide and pesticide formulations at very low concentrations (100–1000 mg L−1) in order to control the spray characteristics, notably to reduce spray drift and influence droplet bounce.... Read More about The influence of the extensional viscosity of very low concentrations of high molecular mass water-soluble polymers on atomisation and droplet impact.

Effect of Polydispersity on Fluorescence Quenching in Micelles Formed by Telechelic Associative Polymers (2007)
Journal Article
English, R. J., Ratcliffe, I., Blanchard, R., & Parsons, B. J. (2007). Effect of Polydispersity on Fluorescence Quenching in Micelles Formed by Telechelic Associative Polymers. Macromolecules, 40(18), 6699-6708. https://doi.org/10.1021/ma0624649

Time-resolved fluorescence quenching studies, using pyrene as a probe for micellar environments in solutions of a telechelic associating polymer based on PEG with n-C12 (dodecyl) hydrophobic end groups, have been carried out to determine the aggrega... Read More about Effect of Polydispersity on Fluorescence Quenching in Micelles Formed by Telechelic Associative Polymers.

Brownian Dynamics Simulations of Associating Diblock Copolymers (2007)
Journal Article
Cass, M. J., Heyes, D. M., & English, R. J. (2007). Brownian Dynamics Simulations of Associating Diblock Copolymers. Langmuir, 23(12), 6576-6587. https://doi.org/10.1021/la063210j

A novel coarse-grained computational model for associating polymers is proposed that is based on a Gaussian “blob” representation of the polymer chains. The model allows a large number of model polymers to be simulated at moderate computational cost... Read More about Brownian Dynamics Simulations of Associating Diblock Copolymers.

SANS and Rheology Study of Aqueous Solutions and Gels Containing Highly Swollen Diblock Copolymer Micelles (2003)
Journal Article
Castelletto, V., Hamley, I. W., English, R. J., & Mingvanish, W. (2003). SANS and Rheology Study of Aqueous Solutions and Gels Containing Highly Swollen Diblock Copolymer Micelles. Langmuir, 19(8), 3229-3235. https://doi.org/10.1021/la026917o

Aqueous micellar solutions and gels of the diblock copolymer E398B19 (E = oxyethylene, B = oxybutylene) have been investigated by rheology and small-angle neutron scattering (SANS) in the liquid, soft gel, and hard gel phases. Rheology experiments w... Read More about SANS and Rheology Study of Aqueous Solutions and Gels Containing Highly Swollen Diblock Copolymer Micelles.

Hydrophobically Modified Associative Polymer Solutions: Rheology and Microstructure in the Presence of Nonionic Surfactants (2002)
Journal Article
English, R. J., Laurer, J. H., Spontak, R. J., & Khan, S. A. (2002). Hydrophobically Modified Associative Polymer Solutions: Rheology and Microstructure in the Presence of Nonionic Surfactants. Industrial & Engineering Chemistry Research, 41(25), 6425-6435. https://doi.org/10.1021/ie020409s

We report on the rheology and morphology of a hydrophobically modified alkali-swellable emulsion (HASE) polymer solubilized in alkaline media containing nonionic surfactants. The HASE polymer consists of complex alkylaryl hydrophobes composed of oli... Read More about Hydrophobically Modified Associative Polymer Solutions: Rheology and Microstructure in the Presence of Nonionic Surfactants.