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Volumn 43, Issue 11, 2010, Pages 5158-5161

Suppression of the t g-nanoconfinement effect in thin poly(vinyl acetate) films by sorbed water

Author keywords

[No Author keywords available]

Indexed keywords

AIR INTERFACE; COMPLEX DIELECTRIC CONSTANT; CONFINEMENT EFFECTS; CREEP COMPLIANCE; FREESTANDING FILMS; GLASS TRANSITION TEMPERATURE; IMAGINARY PARTS; MICRO-BUBBLE; NANOCONFINEMENT EFFECTS; NANOCONFINEMENTS; PEAK TEMPERATURES; POLYSTYRENE FILMS; SORBED WATER; SUPPORTED ON SILICA; ULTRATHIN LAYERS;

EID: 77953141779     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma1005606     Document Type: Article
Times cited : (53)

References (46)
  • 24
    • 25444484944 scopus 로고    scopus 로고
    • J. Chem. Phys. 2005, 123, 111102.
    • (2005) J. Chem. Phys. , vol.123 , pp. 111102
  • 31
    • 77953155020 scopus 로고    scopus 로고
    • Ph.D. Dissertation, Northwestern University
    • Miller, K. E. Ph.D. Dissertation, Northwestern University, 1996.
    • (1996)
    • Miller, K.E.1
  • 40
    • 77953154065 scopus 로고    scopus 로고
    • Experimental data were taken during the winter in suburban Chicago, IL, in a lab at a temperature of ∼293 K and relative humidity of ∼10%
    • Experimental data were taken during the winter in suburban Chicago, IL, in a lab at a temperature of ∼293 K and relative humidity of ∼10%.
  • 41
    • 70349859984 scopus 로고    scopus 로고
    • Water sorption also impacts the thermal expansion behavior of ultrathin PVAc films in the glassy state, especially in the region below ∼290 K. As can be seen in Figure 2 b, the thickness change of a 23 nm thick dry PVAc film as a function of temperature in glassy state becomes almost negligible, indicating the reduction of thermal expansivity toward zero in the glassy state with decreasing temperature. We suspect that this originates from water absorption upon cooling: as already mentioned, the sample environment is not perfectly dry, so PVAc films can absorb small amounts of water upon cooling. Similar behavior was not seen in a detailed study [ Kim, S.; Hewlett, S. A.; Roth, C. B.; Torkelson, J. M. Eur. Phys. J. E 2009, 30, 83 - 92 ] of thermal expansion coefficient in confined PS films, presumably because PS sorbs almost no water from the atmosphere.
    • (2009) Eur. Phys. J. E , vol.30 , pp. 83-92
    • Kim, S.1    Hewlett, S.A.2    Roth, C.B.3    Torkelson, J.M.4
  • 44
    • 77953160945 scopus 로고    scopus 로고
    • note
    • g, or other differences in experimental protocol or analysis.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.