메뉴 건너뛰기




Volumn 110, Issue 7, 1999, Pages 3553-3565

Tethered chains in poor solvent conditions: An experimental study involving Langmuir diblock copolymer monolayers

Author keywords

[No Author keywords available]

Indexed keywords


EID: 0001310597     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.478223     Document Type: Article
Times cited : (16)

References (70)
  • 6
    • 0027543306 scopus 로고
    • E. Raphael and P. G. de Gennes, J. Phys. Chem. 96, 4002 (1992); H. Ji and P. G. de Gennes, Macromolecules 26, 520 (1993).
    • (1993) Macromolecules , vol.26 , pp. 520
    • Ji, H.1    De Gennes, P.G.2
  • 9
    • 0023981464 scopus 로고
    • France
    • A. Halperin, J. Phys. (France) 49, 547 (1988).
    • (1988) J. Phys. , vol.49 , pp. 547
    • Halperin, A.1
  • 23
    • 0028196114 scopus 로고
    • G. S. Grest and M. Murat, Macromolecules 26, 3108 (1993); G. S. Grest, ibid. 27, 418 (1994).
    • (1994) Macromolecules , vol.27 , pp. 418
    • Grest, G.S.1
  • 51
    • 85034564336 scopus 로고    scopus 로고
    • note
    • Use of a commercial product does not imply recommendation or endorsement by NIST, nor does it imply that the product is necessarily the best available.
  • 55
    • 85034543963 scopus 로고    scopus 로고
    • note
    • For a surface with heterogeneity on a scale which is large compared with the coherence length of the neutron beam, the reflectivity is an area-weighted average of the intensity reflected from each region. In the present case, the area fraction occupied by the islands of copolymer cannot be determined precisely because the reflectivity from the islands is not known. However, an upper bound of 20% is obtained using the reflectivity from the dispersed state in the inset to Fig. 7. The dimension of the tethered layer normal to the surface is nearly the same in the islands as in the dispersed state, as can be seen from the comparable peak positions for the data at -30°C in Fig. 7 and in the inset.
  • 61
    • 0041942857 scopus 로고
    • C. Wu and S. Zhou, Macromolecules 28, 8381 (1995); X. Wang, X. Qiu, and C. Wu, Macromolecules 31, 2972 (1998).
    • (1995) Macromolecules , vol.28 , pp. 8381
    • Wu, C.1    Zhou, S.2
  • 62
    • 0032485753 scopus 로고    scopus 로고
    • C. Wu and S. Zhou, Macromolecules 28, 8381 (1995); X. Wang, X. Qiu, and C. Wu, Macromolecules 31, 2972 (1998).
    • (1998) Macromolecules , vol.31 , pp. 2972
    • Wang, X.1    Qiu, X.2    Wu, C.3
  • 64
    • 85034543706 scopus 로고    scopus 로고
    • note
    • g. θ (Ref. 40), and here we assume that the same holds for the ratios in theta and poor solvents.
  • 65
    • 85034565045 scopus 로고    scopus 로고
    • note
    • g is a linear function of Σ over this range (Ref. 40).
  • 66
    • 85034543947 scopus 로고    scopus 로고
    • note
    • This upper limit for the magnitude of the temperature gradient through the liquid was determined by varying the vertical position of the thermocouple, which resulted in a variation of 3.4° at the lowest temperature. This is an upper limit since the thermocouple may have been partially exposed to the air above the liquid at its highest vertical position. A different method with liner spatial resolution is required to precisely determine the gradient. In addition to the above, the fact that the surface tension continues to increase nearly linearly down to the lowest temperatures (see Fig. 6) indicates that the surface layer is experiencing nearly the same variation in temperature as that measured by the thermocouple down to the lowest temperatures. From the linearity in the data for DOP, the temperature gradient would appear to be less than 4°C.
  • 67
    • 85034559264 scopus 로고    scopus 로고
    • note
    • dry are evaluated in the strong stretching limit.
  • 69
    • 85034559077 scopus 로고    scopus 로고
    • Ph.D. thesis, Department of Physics, Memorial University of Newfoundland
    • R. Baranowski, Ph.D. thesis, Department of Physics, Memorial University of Newfoundland, 1997.
    • (1997)
    • Baranowski, R.1
  • 70
    • 85034558183 scopus 로고    scopus 로고
    • note
    • rms. θ values at τ = -0.21 in Fig. 4(a).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.