SPATIAL-DISTRIBUTION OF THE PHASES IN WATER-IN-OIL EMULSIONS - OPEN AND CLOSED MICROCELLULAR FOAMS FROM CROSS-LINKED POLYSTYRENE

被引:270
作者
WILLIAMS, JM
WROBLESKI, DA
机构
[1] Los Alamos Natl Lab, Los Alamos, NM,, USA, Los Alamos Natl Lab, Los Alamos, NM, USA
关键词
PLASTICS; FOAMED - Polymerization - POLYSTYRENES - Crosslinking - SURFACE ACTIVE AGENTS - Effects;
D O I
10.1021/la00081a027
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The composition of styrene/divinylbenzene/sorbitan monooleate/water emulsions has a dramatic effect on the openness of the cells of the foam prepared by polymerizing the monomers and subsequently removing the water. Monomer concentrations were varied from 0. 025 to 0. 20 g/cm**3, while the surfactant level was varied from 1. 2% to 320% of the monomer. Most remarkably, the variation in cell openness, and hence the continuity of the oil phase, was insensitive to the amount of oil. The variation was, however, strongly related to the surfactant-to-oil ratio. The structures of the resulting foams provide further evidence that emulsions possess considerable spatial ordering of the phases and, hence, the molecular species associated with them at the time of polymerization.
引用
收藏
页码:656 / 662
页数:7
相关论文
共 13 条
  • [1] Barby D., 1982, Eur. Pat. Appl., Patent No. [0060138, 60138]
  • [2] BECHER P, 1957, EMULSIONS THEORY PRA, P103
  • [3] CHEN C, 1987, UCID2108086 LAWR LIV
  • [4] THE MECHANICS OF 3-DIMENSIONAL CELLULAR MATERIALS
    GIBSON, LJ
    ASHBY, MF
    [J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1982, 382 (1782): : 43 - &
  • [5] GUNN T, 1985, COMMUNICATION
  • [6] KRAYNIK AM, 1987, COMMUNICATION
  • [7] LETTS SA, 1985, UCID20537 LAWR LIV N
  • [8] LOW SURFACE-ENERGY POLYMERS AND SURFACE-ACTIVE BLOCK POLYMERS .2. RIGID MICROPOROUS FOAMS BY EMULSION POLYMERIZATION
    LITT, MH
    HSIEH, BR
    KRIEGER, IM
    CHEN, TT
    LU, HL
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1987, 115 (02) : 312 - 329
  • [9] DEFORMATION AND ENERGY-ABSORPTION DIAGRAMS FOR CELLULAR SOLIDS
    MAITI, SK
    GIBSON, LJ
    ASHBY, MF
    [J]. ACTA METALLURGICA, 1984, 32 (11): : 1963 - 1975
  • [10] MANEGOLD E, 1952, EMULSIONEN, P23