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Macromolecules
Volumn 41, Issue 22, 2008, Pages 8694-8711
Component dynamics in polyisoprene/poly(4-tert-butylstyrene) miscible blends
Author keywords

[No Author keywords available]
Indexed keywords

CERAMIC CAPACITORS; DIELECTRIC DEVICES; DIELECTRIC LOSSES; PRINTED CIRCUIT BOARDS;
EID: 57349131216     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma8013417     Document Type: Article
Times cited : (38)
References (59)
  • 21
    • 34547723170 scopus 로고    scopus 로고
    • Chain Dimensions and Entanglement Spacings
    • 2nd ed, Mark, J. E, Ed, Springer: New York, Chapter 25, pp
    • Fetters, L. J.; Lohse, D. J.; Colby, R. H., Chain Dimensions and Entanglement Spacings, in Physical Properties of Polymers Handbook, 2nd ed.; Mark, J. E., Ed.; Springer: New York, 2007; Chapter 25, pp 445-452.
    • (2007) Physical Properties of Polymers Handbook , pp. 445-452
    • Fetters, L.J.1    Lohse, D.J.2    Colby, R.H.3
  • 25
    • 57349200598 scopus 로고    scopus 로고
    • c ≅ 250 °C
    • c ≅ 250 °C
  • 29
    • 34548608881 scopus 로고    scopus 로고
    • Dielectric and Mechanical Spectroscopy - a Comparison
    • Schönhals A, Eds, Springer: Berlin, Chapter 16, pp
    • Pakula, T. Dielectric and Mechanical Spectroscopy - a Comparison, in Broadband Dielectric Spectroscopy; Kremer, F., Schönhals A., Eds.; Springer: Berlin, 2003; Chapter 16, pp 597-623.
    • (2003) Broadband Dielectric Spectroscopy; Kremer, F , pp. 597-623
    • Pakula, T.1
  • 30
    • 57349194370 scopus 로고    scopus 로고
    • 29,30b,c because of several factors that possibly include a difference between the viscoelastically and dielectrically active segments,
    • 29,30b,c because of several factors that possibly include a difference between the viscoelastically and dielectrically active segments,
  • 33
    • 57349122848 scopus 로고    scopus 로고
    • The dielectric intensity of the global relaxation of PI chains, Δε, is proportional to vRPt2/T, where v and API2 are the number density and mean-square end-to-end distance of the chain, respectively, and T is the absolute temperature. 14,15 Thus, strictly speaking, the intensity correction factor to be multiplied to the ε″ data at T is given by [T/ T r, vRPI2, vRPI2} T. However, changes of v and RPI2 with Tare much smaller than the change of T itself. For this reason, we can safely neglect the v and RPI2 terms in the correction factor
    • 2 terms in the correction factor.
  • 34
    • 57349098346 scopus 로고    scopus 로고
    • The global dielectric relaxation of PI chains detects the end-to-end vector fluctuation.14.15 Thus, any heterogeneity over a length scale much shorter than the end-to-end distance is smeared in the global relaxation and can be just regarded as a factor determining a segmental friction averaged over the chain backbone. For this reason, the global dielectric mode distribution (being independent of this average friction) is insensitive to a change of the environment, unless the chains are subjected to strong thermodynamic/spatial confinements.15 In contrast, the segmental relaxation detecting the dynamics at short length scales is very sensitive to changes in the environment;32b,c for example, the segmental mode distribution broadens on dilution with a solvent
    • 32b,c for example, the segmental mode distribution broadens on dilution with a solvent,
  • 45
    • 57349189048 scopus 로고    scopus 로고
    • In the previous work,20 we assumed that the PtBS-16 chains relaxing faster than PI-20 gave no constraint for the PI-20 motion in the blend with wPtBS, 20 wt, However, as judged from the result of comparison in the bottom panel of Figure 11, it is more reasonable to assume some constraint due to the PtBS-16 chains in this blend
    • PtBS = 20 wt %. However, as judged from the result of comparison in the bottom panel of Figure 11, it is more reasonable to assume some constraint due to the PtBS-16 chains in this blend.
  • 47
    • 57349129631 scopus 로고    scopus 로고
    • In the previous work18 for PI-20/PtBS-70 blend with w PtBS, 20 wt, we neglected the contribution of the minority PI-20 to GPI*(w,T) because the mode broadening due to the minority was just moderate and thus the minority content was small. However, for completeness, this contribution is incorporated in the analysis (eq 15) in this study
    • PI*(w,T) because the mode broadening due to the minority was just moderate and thus the minority content was small. However, for completeness, this contribution is incorporated in the analysis (eq 15) in this study.
  • 54
  • 55
    • 57349189489 scopus 로고    scopus 로고
    • 2).
    • 2).

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.