Synthesis of chemically grafted polystyrene "brushes" and their influence on the dewetting in thin polystyrene films

被引:40
作者
Voronov, A
Shafranska, O
机构
[1] Univ Bayreuth, Dept Phys Chem 2, D-95440 Bayreuth, Germany
[2] Natl Univ Lvivska Polytechnika, UA-79053 Lvov, Ukraine
关键词
D O I
10.1021/la011489s
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
End-grafted polystyrene, "brushes" of various thickness and grafting density on silica surfaces were synthesized by surface-initiated polymerization. The "brushes" were studied by contact angle measurements, ellipsometry, and scanning force microscopy (SFM). Wetting behavior of thin polystyrene film on the top of the grafted layers was investigated using optical microscopy and SFM. The film stability was strongly dependent on the grafting amount. We identified three grafting density regimes with respect to stability of the top polystyrene films: at small and very large grafting density the top film dewets "brushes". while at moderate grafting density the polystyrene film was stable after 80 h of annealing time at 155 degreesC.
引用
收藏
页码:4471 / 4477
页数:7
相关论文
共 44 条
  • [1] BOVEN G, 1991, POLYM COMMUN, V32, P50
  • [2] GRAFTING KINETICS OF POLY(METHYL METHACRYLATE) ON MICROPARTICULATE SILICA
    BOVEN, G
    OOSTERLING, MLCM
    CHALLA, G
    SCHOUTEN, AJ
    [J]. POLYMER, 1990, 31 (12) : 2377 - 2383
  • [3] EVIDENCE FOR CLEAVAGE OF POLYMER-CHAINS BY CRACK-PROPAGATION
    BROWN, HR
    DELINE, VR
    GREEN, PF
    [J]. NATURE, 1989, 341 (6239) : 221 - 222
  • [4] Wettability of porous surfaces.
    Cassie, ABD
    Baxter, S
    [J]. TRANSACTIONS OF THE FARADAY SOCIETY, 1944, 40 : 0546 - 0550
  • [5] Fleer G., 1993, Polymers at interfaces
  • [6] AUTOPHOBIC LIQUIDS AND THE PROPERTIES OF THEIR ADSORBED FILMS
    HARE, EF
    ZISMAN, WA
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1955, 59 (04) : 335 - 340
  • [7] Chain end effects and dewetting in thin polymer films
    Henn, G
    Bucknall, DG
    Stamm, M
    Vanhoorne, P
    Jerome, R
    [J]. MACROMOLECULES, 1996, 29 (12) : 4305 - 4313
  • [8] THE WETTING TRANSITION FOR POLYMER MIXTURES
    JONES, RAL
    [J]. POLYMER, 1994, 35 (10) : 2160 - 2166
  • [9] Factors affecting the preparation of permanently end-grafted polystyrene layers
    Jones, RAL
    Lehnert, RJ
    Schonherr, H
    Vancso, J
    [J]. POLYMER, 1999, 40 (02) : 525 - 530
  • [10] Wetting and autophobicity of a polymer melt on a network of itself
    Kerle, T
    Yerushalmi-Rozen, R
    Klein, J
    [J]. MACROMOLECULES, 1998, 31 (02) : 422 - 429