DEFORMATION, MELTING, AND RELAXATION OF STRUCTURED COLLOIDAL DISPERSIONS

被引:16
作者
BRADBURY, A [1 ]
GOODWIN, JW [1 ]
HUGHES, RW [1 ]
机构
[1] UNIV BRISTOL,SCH CHEM,CANTOCKS CLOSE,BRISTOL BS8 1TS,AVON,ENGLAND
关键词
D O I
10.1021/la00048a004
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Strongly interacting dispersions of spherical particles of silica and poly(vinylidene fluoride) have been prepared at high concentrations. The linear and nonlinear viscoelastic response of these systems have been investigated. These systems show a strong elastic response characteristic of viscoelastic ''solidlike'' behavior. It is demonstrated that by calculating the dimensionless internal energy density, a phase diagram can be constructed for the onset of viscoelastic solidlike behavior. The linear viscoelastic response has been calculated using a model for the relaxation spectrum which gives excellent agreement with the data. A model is proposed for the nonlinear viscoelastic response for small to moderate strains. It is based on the idea that increasing strain causes progressive melting of the order in the dispersion into a metastable liquid phase. It is demonstrated that when a scaled strain or an equivalent temperature is plotted against the fraction of liquid present, the nonlinear viscoelastic response of these systems can be reduced onto a master curve.
引用
收藏
页码:2863 / 2872
页数:10
相关论文
共 30 条
  • [1] PREPARATION OF MONODISPERSE SILICA PARTICLES - CONTROL OF SIZE AND MASS FRACTION
    BOGUSH, GH
    TRACY, MA
    ZUKOSKI, CF
    [J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1988, 104 (01) : 95 - 106
  • [2] VISCOELASTIC PROPERTIES OF CONCENTRATED LATTICES .1. METHODS OF EXAMINATION
    BUSCALL, R
    GOODWIN, JW
    HAWKINS, MW
    OTTEWILL, RH
    [J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1982, 78 : 2873 - 2887
  • [3] VISCOELASTIC PROPERTIES OF CONCENTRATED LATTICES .2. THEORETICAL-ANALYSIS
    BUSCALL, R
    GOODWIN, JW
    HAWKINS, MW
    OTTEWILL, RH
    [J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1982, 78 : 2889 - 2899
  • [4] FLOW OF ORDERED LATEX SUSPENSIONS - YIELDING AND CATASTROPHIC SHEAR THINNING
    CHEN, LB
    ZUKOSKI, CF
    [J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1990, 86 (14): : 2629 - 2639
  • [5] Derjaguin B.V., 1941, ACTA PHYSICOCHIM URS, V14, P633, DOI DOI 10.1016/0079-6816(93)90013-L
  • [6] Ferry JD., 1980, VISCOELASTIC PROPERT
  • [7] ORDERING IN COLLOIDAL SYSTEMS
    FORSYTH, PA
    MARCELJA, S
    MITCHELL, DJ
    NINHAM, BW
    [J]. ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1978, 9 (01) : 37 - 60
  • [8] THE ELASTICITY OF WEAKLY FLOCCULATED SUSPENSIONS
    GOODWIN, JW
    HUGHES, RW
    PARTRIDGE, SJ
    ZUKOSKI, CF
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1986, 85 (01) : 559 - 566
  • [9] GOODWIN JW, 1990, MATER RES SOC SYMP P, V177, P187, DOI 10.1557/PROC-177-187
  • [10] THE RHEOLOGICAL PROPERTIES AND THE MICROSTRUCTURE OF CONCENTRATED LATTICES
    GOODWIN, JW
    GREGORY, T
    MILES, JA
    WARREN, BCH
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1984, 97 (02) : 488 - 495