Imperial College London
Alternate

Professor DameJuliaHiggins

Faculty of Engineering, Department of Chemical Engineering

Emeritus Professor Distinguished Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 5565j.higgins

 
 
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Assistant

 

Mrs Sarah Payne +44 (0)20 7594 5567

 
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Location

 

337Roderic Hill BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

254 results found

Elliniadis S, Higgins JS, Clarke N, McLeish TCB, Choudhery RA, Jenkins SDet al., 1997, Phase diagram prediction for thermoset/thermoplastic polymer blends, POLYMER, Vol: 38, Pages: 4855-4862, ISSN: 0032-3861

Journal article

Clarke N, McLeish TCB, Pavawongsak S, Higgins JSet al., 1997, Viscoelastic effects on the early stages of phase separation in polymer blends, MACROMOLECULES, Vol: 30, Pages: 4459-4463, ISSN: 0024-9297

Journal article

Kato S, Tsujita Y, Yoshimizu H, Kinoshita T, Higgins JSet al., 1997, Characterization and CO2 sorption behaviour of polystyrene/polycarbonate blend system, POLYMER, Vol: 38, Pages: 2807-2811, ISSN: 0032-3861

Journal article

Arrighi V, Higgins JS, 1997, Molecular dynamics of a main-chain liquid crystalline polyester below the crystalline to nematic phase transition, JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, Vol: 93, Pages: 1605-1612, ISSN: 0956-5000

Journal article

Soontaranum W, Higgins JS, Papathanasiou TD, 1997, Rheology and thermodynamics in partially miscible polymer blends (vol 67, pg 191, 1996), JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, Vol: 69, Pages: 109-109, ISSN: 0377-0257

Journal article

Hermes HE, Higgins JS, Bucknall DG, 1997, Investigation of the melt interface between polyethylene and polystyrene using neutron reflectivity, POLYMER, Vol: 38, Pages: 985-989, ISSN: 0032-3861

Journal article

Soontaranun W, Higgins JS, Papathanasiou TD, 1997, Study of the effect of flow on partially miscible polymer blends, Symposium on 1997 Jubilee Research Event, Publisher: INST CHEMICAL ENGINEERS, Pages: 349-351

Conference paper

Elliniadis S, Higgins JS, 1996, Phase separation in thermoplastic - Thermoset polymer blends, 5th European Symposium on Polymer Blends, Publisher: WILEY-V C H VERLAG GMBH, Pages: 55-61, ISSN: 1022-1360

Conference paper

Soontaranum W, Higgins JS, Papathanasiou TD, 1996, Rheology and thermodynamics in partially miscible polymer blends, Workshop on Unresolved Experimental Dilemmas in the Dynamics of Complex Fluids, Publisher: ELSEVIER SCIENCE BV, Pages: 191-212, ISSN: 0377-0257

Conference paper

Cloke VM, Higgins JS, Phoon CL, Richardson SM, King SM, Done R, Cooper TEet al., 1996, Poiseuille geometry shear flow apparatus for small-angle scattering experiments, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 67, Pages: 3158-3163, ISSN: 0034-6748

Journal article

Arrighi V, Higgins JS, 1996, Side group rotations in amorphous polymers, International Workshop on Quasielastic Neutron Scattering (QENS 95), Publisher: ELSEVIER SCIENCE BV, Pages: 1-9, ISSN: 0921-4526

Conference paper

Soontaranun W, Higgins JS, Papathanasiou TD, 1996, Shear flow and the phase behaviour of polymer blends, FLUID PHASE EQUILIBRIA, Vol: 121, Pages: 273-292, ISSN: 0378-3812

Journal article

Schipp C, Hill MJ, Barham PJ, Cloke VM, Higgins JS, Oiarzabalt Let al., 1996, Ambiguities in the interpretation of small-angle neutron scattering from blends of linear and branched polyethylene, POLYMER, Vol: 37, Pages: 2291-2297, ISSN: 0032-3861

Journal article

Young AM, Timbo AM, Higgins JS, Peiffer DG, Lin MYet al., 1996, Thermodynamics of aggregation in associating ionomer solutions, POLYMER, Vol: 37, Pages: 2701-2708, ISSN: 0032-3861

Journal article

Young AM, Higgins JS, Peiffer DG, Rennie ARet al., 1996, Effect of aggregation on the single-chain dimensions of sulfonated polystyrene ionomers in xylene, POLYMER, Vol: 37, Pages: 2125-2130, ISSN: 0032-3861

Journal article

Fernandez ML, Higgins JS, Richardson SM, 1996, Polymer blend under shear flow: A thermodynamic study, International Conference on Advances in Materials and Processing Technologies (AMPT 93), Publisher: ELSEVIER SCIENCE SA LAUSANNE, Pages: 807-819, ISSN: 0924-0136

Conference paper

Arrighi V, Higgins JS, Abis L, Weiss RAet al., 1996, Characterization of a main-chain semiflexible liquid crystalline polymer: Degree of orientational order, POLYMER, Vol: 37, Pages: 141-148, ISSN: 0032-3861

Journal article

Soontaranun W, Higgins JS, Papathanasiou TD, 1995, Some aspects of flow-induced mixing and phase-separation during processing of polymer blends, International SAMPE Technical Conference, Vol: 27, Pages: 197-207

Partially miscible polymer blends are characterised by the occurrence of homogeneous or multi-phase microstructures depending on the prevailing conditions of composition, temperature, pressure and flow. The capability to deliberately shift their phase diagram through the application of flow is of particular interest in manufacturing, since it opens up a range of opportunities for the generation of products with 'controllably inhomogeneous' microstructure through 'smart processing'. Key in this, is the ability to quantify the effect of flow on the phase diagram. This work presents a theoretical analysis of this problem along with supporting experimental evidence. This analysis is in qualitative agreement with experimental evidence of shear-induced mixing in SAN/PMMA blends. The presented analysis seems to indicate that by determining the compositional dependence of blend viscosity one may be able to predict the direction in which shear might shift the phase diagram.

Journal article

FERNANDEZ ML, HIGGINS JS, 1995, EFFECT OF FLOW ON POLYMER-POLYMER MISCIBILITY, 35th IUPAC International Symposium on Macromolecules (MACROAKRON 94), Publisher: HUTHIG & WEPF VERLAG, Pages: 985-996, ISSN: 1022-1360

Conference paper

ARRIGHI V, HIGGINS JS, BURGESS AN, HOWELLS WSet al., 1995, ROTATION OF METHYL SIDE-GROUPS IN POLYMERS - A FOURIER-TRANSFORM APPROACH TO QUASI-ELASTIC NEUTRON-SCATTERING .2. POLYMER BLENDS, MACROMOLECULES, Vol: 28, Pages: 4622-4630, ISSN: 0024-9297

Journal article

ARRIGHI V, HIGGINS JS, BURGESS AN, HOWELLS WSet al., 1995, ROTATION OF METHYL SIDE-GROUPS IN POLYMERS - A FOURIER-TRANSFORM APPROACH TO QUASI-ELASTIC NEUTRON-SCATTERING .1. HOMOPOLYMERS, MACROMOLECULES, Vol: 28, Pages: 2745-2753, ISSN: 0024-9297

Journal article

FERNANDEZ ML, HIGGINS JS, RICHARDSON SM, 1995, FLOW INSTABILITIES IN POLYMER BLENDS UNDER SHEAR, POLYMER, Vol: 36, Pages: 931-939, ISSN: 0032-3861

Journal article

YOUNG AM, HIGGINS JS, PEIFFER DG, RENNIE ARet al., 1995, EFFECT OF SULFONATION LEVEL ON THE SINGLE-CHAIN DIMENSIONS AND AGGREGATION OF SULFONATED POLYSTYRENE IONOMERS IN XYLENE, POLYMER, Vol: 36, Pages: 691-697, ISSN: 0032-3861

Journal article

Chen ZJ, Wu R, Shaw MT, Weiss RA, Fernandez ML, Higgins JSet al., 1995, Rheo‐Optical behavior of binary polymer blends: The effect of simple shear flow on phase behavior, Pages: 92-99, ISSN: 0032-3888

The phase behavior of polymer blends under simple shear flow has been studied using a custom‐designed rheo‐optical system consisting of a two‐dimensional small‐angle light scattering (SALS) device incorporated into a conventional rheometer. Two‐dimensional SALS images were gathered for model polymer blend systems with different quiescent phase behavior: polystyrene/polyisobutylene (PS/PIB) that exhibits upper critical solution temperature phase behavior and polystyrene/poly(vinyl methyl ether) (PS/PVME) that shows lower critical solution temperature phase behavior. For the PS/PIB blend, shear‐induced phase mixing occurred at a critical shear rate. Below that critical shear rate, the dispersed phase was highly elongated parallel to the flow direction. For PS/PVME blends, a streak scattering pattern was observed even though the sample became optically clear after shearing. We observed, apparently for the first time, the development of a bright‐streak pattern from a transient dark‐streak pattern for a polymer blend system under shear. Rheo‐microscopy studies revealed an intriguing wave pattern that developed coincident with the observation of a streak pattern by SALS. The relationship between the two phenomena has not yet been established. Copyright © 1995 Society of Plastics Engineers

Conference paper

CHEN ZJ, WU RJ, SHAW MT, WEISS RA, FERNANDEZ ML, HIGGINS JSet al., 1995, RHEOOPTICAL BEHAVIOR OF BINARY POLYMER BLENDS - THE EFFECT OF SIMPLE SHEAR-FLOW ON PHASE-BEHAVIOR, Polyblends 93 Symposium, Publisher: SOC PLASTICS ENG INC, Pages: 92-99, ISSN: 0032-3888

Conference paper

FERNANDEZ ML, HIGGINS JS, HORST R, WOLF BAet al., 1995, COMPLEX MISCIBILITY BEHAVIOR FOR POLYMER BLENDS IN FLOW, POLYMER, Vol: 36, Pages: 149-154, ISSN: 0032-3861

Journal article

FERNANDEZ ML, HIGGINS JS, 1995, EFFECT OF FLOW ON POLYMER-POLYMER MISCIBILITY, Symposium on Flow-Induced Structure in Polymers, at the 208th National Meeting of the American-Chemical-Society, Publisher: AMER CHEMICAL SOC, Pages: 106-121, ISSN: 0097-6156

Conference paper

FERNANDEZ ML, HIGGINS JS, 1995, Effect of flow on polymer-polymer miscibility, Symposium on Flow-Induced Structure in Polymers, at the 208th National Meeting of the American-Chemical-Society, Pages: 106-121

The effect of shear now on the miscibility of three model polymer blends has been studied by one-dimensional and two-dimensional light scattering, differential scanning calorimetry and in-situ optical microscopy. Shear was applied between parallel plates and the range of shear rates used was from approximately 0.5 s(-1) to 15 s(-1) Shear was observed to induce both miscibility and phase separation depending on the temperature and shear rate used. Under certain conditions, a large wave-like pattern was observed by in-situ microscopy which gave rise to elongated streaks in the two-dimensional light scattering patterns. These ''waves'' appeared to be independent of phase separation and instead seem to be consistent with the presence of fluid instabilities.

Conference paper

ARRIGHI V, HIGGINS JS, 1994, EFFECT OF BLENDING ON LOCAL MOTION IN POLYMERS STUDIED BY QUASI-ELASTIC NEUTRON-SCATTERING, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Vol: 208, Pages: 417-PMSE, ISSN: 0065-7727

Journal article

FERNANDEZ ML, HIGGINS JS, 1994, FLOW-INDUCED MIXING AND DEMIXING IN POLYMER BLENDS, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Vol: 208, Pages: 23-PMSE, ISSN: 0065-7727

Journal article

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