Molecular weight dependence of network length scales in polymer solutions

Macromolecules

Volumn 39, Issue 5, 2006, Pages 2000-2003

  Uematsu, Takashi ^a   Svanberg, Christer ^a   Jacobsson, Per ^a  

^a CHALMERS UNIVERSITY OF TECHNOLOGY   (Sweden)

Author keywords

[No Author keywords available]

Indexed keywords

MOLECULAR WEIGHT; STYRENE;

CHAIN NETWORKS; CONCENTRATION DEPENDENCE; POLYMER SOLUTIONS;

POLYMERS;

EID: 33644947572     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma0520646     Document Type: Article

References (35)

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3. (b) Uematsu, T.; Svanberg, C.; Nydén, M.; Jacobsson, AIP Conf. Proc. 2004, 708, 205-208.
4. (c) Uematsu, T.; Svanberg, C.; Jacobsson, P. Macromolecules 2005, 38, 6227-6230.
5. For example, biopolymers such as cellulose derivatives, DNA fragments and actin filaments, and synthetic semirigid polymers such as chains with a π-conjugated backbone, chains with bulky side chains and polyelectrolytes.
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8. (c) Ott, A.; Magnasco, M.; Simon, A.; Libchaber, A. Phys. Rev. E 1993, 48, R1642-R1645.
9. τ ≈ 250 nm.
10. g is the radius of gyration of the chain.
11. Rubinstein, M.; Colby, R. Polymer Physics; Oxford University Press: New York, 2003.
12. 2
13. Teraoka, I. Polymer Solutions: An Introduction to Physical Properties; Wiley-Interscience: New York, 2002.
14. In this paper, the interchain interactions also include long-range interactions between segments belonging to the same chain, which are situated a long distance apart along the backbone.
15. Schaefer, D. W.; Han, C. C. In Dynamic Light Scattering: Applications of Photo Correlation Spectroscopy; Pecora, R., Ed.; Plenum: New York, 1985; pp 181-243.
16. 2
17. 2c the crossover volume fraction is estimated as roughly 0.1.
18. h properly in the regime (see ref 24 in ref 2c).
19. c is the collective diffusion coefficient.
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24. The atactic styrene chains used for the present study have inert terminal groups, which are H-terminated at one end and n-butylterminated at the other end.
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26. 4a
27. Einaga, Y.; Abe, F.; Yamakawa, H. Macromolecules 1993, 26, 6243-6250.
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29. w chain solutions have a glass transition temperature similar to that of the solvent (≈ 130 K), not to the chain (≈ 350 K) (see e.g.: Floudas, G.; Steffen,.W.; Fischer, E. W.; Brown, W. J. Chem. Phys. 1993, 99, 695-703).
30. According to the free volume theory for glass transition (sèe e.g.: Sperling, L. H. Introduction to Physical Polymer Science; Wiley-Interscience: New York, 2001), this is due to that there is much more free volume per unit volume for the solvent than the chain. Therefore, the applicability of the theory used in the present study can be valid as long as the contribution of the solvent still dominates that of the chains.
31. Chekal, B. P.; Torkelson, J. M. Macromolecules 2002, 35, 8126-8138.
32. 23,24
33. 12
34. -0.5 is expected. This can be ascribed to the limited number of data points for the solutions at the corresponding concentrations.
35. w chains that are experiencing ternary interchain interactions (n = 3) at the crossover concentration.