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Volumn 34, Issue 17, 1996, Pages 2987-2997

Small molecule diffusion in a rubbery polymer near Tg: Effects of probe size, shape, and flexibility

Author keywords

Fluorescence nonradiative energy transfer; Glass transition temperature; Probe flexibility effects; Probe shape effects; Rubbery polymer; Small molecule diffusion

Indexed keywords

DIFFUSION; ENERGY TRANSFER; FLUORESCENCE; GLASS TRANSITION; MOLECULAR STRUCTURE; MOLECULES; PROBES; THERMAL EFFECTS;

EID: 0030387067     PISSN: 08876266     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1099-0488(199612)34:17<2987::AID-POLB11>3.0.CO;2-4     Document Type: Article
Times cited : (47)

References (60)
  • 18
    • 0000039620 scopus 로고
    • ™, a poly(ether imide) (P. F. Nealey, R. E. Cohen, and A. S. Argon, Polymer, 36, 3687 (1995).) Magnetic resonance imaging has also been used to monitor Fickian and non-Fickian diffusion of sorbents in polymers (M. Ercken, D. Adriaensens, D. Vanderzande, and J. Gelan, Macromolecules, 28, 8541 (1995).
    • (1995) Polymer , vol.36 , pp. 3687
    • Nealey, P.F.1    Cohen, R.E.2    Argon, A.S.3
  • 19
    • 0000402603 scopus 로고
    • ™, a poly(ether imide) (P. F. Nealey, R. E. Cohen, and A. S. Argon, Polymer, 36, 3687 (1995).) Magnetic resonance imaging has also been used to monitor Fickian and non-Fickian diffusion of sorbents in polymers (M. Ercken, D. Adriaensens, D. Vanderzande, and J. Gelan, Macromolecules, 28, 8541 (1995).
    • (1995) Macromolecules , vol.28 , pp. 8541
    • Ercken, M.1    Adriaensens, D.2    Vanderzande, D.3    Gelan, J.4
  • 27
    • 85033860254 scopus 로고    scopus 로고
    • note
    • -5 mol/L. Solutions used to prepare decacyclene-doped films for this study were sufficiently dilute to prevent aggregate formation.
  • 30
    • 4243092747 scopus 로고
    • Ph.D. thesis, Northwestern University
    • (c) J. S. Royal, Ph.D. thesis, Northwestern University, 1992.
    • (1992)
    • Royal, J.S.1
  • 36
    • 85033856418 scopus 로고    scopus 로고
    • note
    • o is 3.7 nm, this interfacial region constitutes at most a fraction of a percent of the total "sandwich" thickness. Consequently, even in the worst case studied here, less than 1% of the chromophores in the film sandwich are close enough before annealing to undergo any NRET.
  • 37
    • 85033855612 scopus 로고    scopus 로고
    • note
    • -5, which is negligible.
  • 38
    • 85033837291 scopus 로고    scopus 로고
    • note
    • gs as measured by DSC for the polymers employed in this study, PiBMA and PEMA, were unchanged by the low level of labeling or doping with chromophores; therefore, the introduction of the fluorescent chromophores at low levels does not significantly affect polymer dynamics in these systems. Thus, the dopant chromophores can be considered as diffusing from one film, of infinitesimal chromophore content, to another of zero concentration. Consequently, it can be assumed that the layered films used in this study constitute a continuous matrix through which the donor molecules diffuse.
  • 41
    • 0000036821 scopus 로고    scopus 로고
    • 1/2; with each line characterized by a single, uniform slope. This constant slope is clear evidence that there is no detectable change in the diffusion coefficient of each chromophore as it traverses the interfacial region.
    • (1996) Macromolecules , vol.29 , pp. 798
    • Brown, H.R.1    Russell, T.R.2
  • 42
    • 0029229727 scopus 로고
    • 1/2; with each line characterized by a single, uniform slope. This constant slope is clear evidence that there is no detectable change in the diffusion coefficient of each chromophore as it traverses the interfacial region.
    • (1995) Macromolecules , vol.28 , pp. 771
    • Wu, W.L.1    Van Zanten, J.H.2    Orts, W.J.3
  • 43
    • 0342763170 scopus 로고
    • 1/2; with each line characterized by a single, uniform slope. This constant slope is clear evidence that there is no detectable change in the diffusion coefficient of each chromophore as it traverses the interfacial region.
    • (1995) Phys. Rev. E. , vol.52
    • Wallace, W.E.1    Van Zanten, J.H.2    Wu, W.L.3
  • 44
    • 84911406494 scopus 로고
    • 1/2; with each line characterized by a single, uniform slope. This constant slope is clear evidence that there is no detectable change in the diffusion coefficient of each chromophore as it traverses the interfacial region.
    • (1994) Europhys. Lett. , vol.27 , pp. 59
    • Keddie, J.L.1    Jones, R.A.L.2    Cory, R.A.3
  • 45
    • 85033840316 scopus 로고    scopus 로고
    • note
    • Such a comparison is currently being undertaken in a collaboration between our research group, using NRET methods, and that of Prof. Mark Ediger (University of Wisconsin), using HFRAP.
  • 47
    • 0029107687 scopus 로고
    • g,/T) can be neglected with little error. (This is true even if the Stokes-Einstein equation is not strictly applicable as the parameter ξ accounts for the deviation from Stokes-Einstein behavior. See ref. 8 and I. Hadj Romdhane, R. P. Danner, and J. L. Duda, Ind. Eng. Chem. Res., 34, 2833 (1995), where this has been done previously.)
    • (1995) Ind. Eng. Chem. Res. , vol.34 , pp. 2833
    • Hadj Romdhane, I.1    Danner, R.P.2    Duda, J.L.3
  • 60
    • 85033855606 scopus 로고    scopus 로고
    • note
    • 3 kJ/mol, 0.37, and -12.8, respectively. The very small changes in these parameters in no way affect the discussion or conclusions reached in ref. 19.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.