Correlation radii for polystyrene (PS) in poor and ⊖ solvents from dynamic light and small angle neutron scattering. new data for ps/acetone. remarks on ps/acetone, ps/cyclohexane, and ps/methylcyclohexane

Macromolecules

Volumn 32, Issue 21, 1999, Pages 7312-7318

  Van Alexander Hook, W ^a,b   Wilczura, Hannah ^a,c   Imre, Attila ^d,e   Rebelo, Luis P N ^e   Melnichenko, Yuri B ^a,d  

^a UNIVERSITY OF TENNESSEE   (United States)

^b OAK RIDGE NATIONAL LABORATORY   (United States)

^c UNIVERSITY OF WARSAW   (Poland)

^d KFKI ATOMIC ENERGY RESEARCH INSTITUTE   (Hungary)

^e UNIVERSIDADE NOVA DE LISBOA   (Portugal)

Author keywords

[No Author keywords available]

Indexed keywords

ACETONE; COMPOSITION EFFECTS; CORRELATION METHODS; DIFFUSION; LIGHT SCATTERING; NEUTRON SCATTERING; ORGANIC SOLVENTS; PARAFFINS; PRECIPITATION (CHEMICAL); PRESSURE EFFECTS; THERMAL EFFECTS; VISCOSITY;

DYNAMIC LIGHT SCATTERING (DLS); METHYLCYCLOHEXANE; SMALL-ANGLE NEUTRON SCATTERING (SANS); STOKES-EINSTEIN RELATION;

POLYSTYRENES;

EID: 0033203676     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma9902394     Document Type: Article

References (31)

1. Melnichenko, Y. B.; Wignall, G. D.; Van Hook, W. A.; Szydlowski, J.; Wilczura, H.; Rebelo, L. P. N. Macromolecules 1998, 31, 8436.
2. Williams, C. E.; Nierlich, M.; Cotton, J. P.; Jannink, G.; Boue, F.; Daoud, M.; Farnoux, B.; Picot, C.; de Gennes, P.-G.; Rinaudo, M.; Moan, M.; Wolf, C. J. Polym. Sei., Polym. Leu. Ed. 1979, 17, 379.
3. Akasu, A. Z.; Summerfield, G. C.; Jahansan, S. N.; Han C. C.; Kim, C. Y.; Yu, H. J. Polym. Sei., Polym. Phys. Ed. 1980, 18, 863.
4. King, J. S.; Boyer, W.; Wignall, G. D.; Ullman, R. Macromolecules 1985, 18, 709.
5. Van Hook, W. A.; Wilczura, H.; Rebelo, L. P. N. Macromolecules 1999, 32, 7299.
6. Melnichenko, Y. B.; Wignall, G. D. Phys. Rev. Lett. 1997, 78, 686.
7. Szydlowski, J.; Van Hook, W. A. Macromolecules 1991, 24, 4883.
8. Luszczyk, M.; Rebelo, L. P. N.; Van Hook, W. A. Macromplecules 1995, 28, 745.
9. Luszczyk, M.; Van Hook, W. A. Macromolecules 1996, 29, 6612.
10. Imre, A.; Van Hook, W. A. J. Polym. Sei., Polym. Phys. 1996, 34B, 751.
11. Imre, A.; Van Hook, W. A. J. Polym. Sei., Polym. Phys. 1994, 32B, 2283.
12. Imre, A.; Van Hook, W. A.: J. Phys. Chem. Ref. Data. 1996, 25, 637.
13. Brown, W.; Nicolai, T. In Dynamic Light Scattering. The method and some applications; Brown, W., Ed.; Clarendon Press: Oxford, England, 1993; Chapter 6 pp 272-318.
14. Berry, G. C. Adv. Polym. Sei. 1994, 114, 233.
15. Higgins, J. S.; Benoit, H. C. Polymers and Neutron Scattering; Clarendon Press: Oxford, England, 1994.
16. Des Cloizeaux, J.; Jannink, G. Polymers in Solution. Their Modeling and Structure; Claredon Press: Oxford, England, 1990.
17. Gold, D.; Onyenemezu, C.; Miller, W. G. Macromolecules 1996, 29, 5700.
18. Sun, S. F. Physical Chemistry of Macromolecules; John Wiley and Sons: New York, 1994, Chapter 10.
19. Jian, T.; Vlassopoulos, D.; Fytas, G.; Pakula, T.; Brown, W. Colloid Polym. Sei. 1996, 274, 1033.
20. Ikier, C.; Klein, H.; Woermann, D. Macromolecules 1995,28, 1003.
21. Hogeman, C. D., Ed. Handbook of Chemistry and Physics, 35th ed.: CRC Press: Cleveland, OH, 1953.
22. Beiner, M.; Fytas, G.; Meier, G.; Kumar, S. K. Phys. Rev. Lett. 1998, 81, 594.
23. Cook, R. L.; King, H. E., Jr.; Peiffer, D. G. Phys. Rev. Lett. 1992, 69, 3072.
24. Narayanan, T.; Kumar, A. Phys. Rep. 1994, 249, 135.
25. LeGuillou, J. C.; Zinn-Justin, J. J. Phys. (Paris) 1989, 50, 1365.
26. Other estimates of this ratio can be obtained. From the review of Fetters, Hadjichristidis, Lindner, and Mays (J. Phys. Chem. Ref. Data 1994,23, 619) Ag/Rh = 1.36 0.15 for PS dissolved in a series of solvents (nominally at room temperature), which, using (Re ~ |static 3V2),1 16 gives (h/£static ~ Astatic ~ 1.3 0.2). This estimate is low because £DLS ~ Ah only in the limit of low concentration, and £increases with concentration. Brown and Nicolai in their 1990 paper (Colloid Polym. Sei. 1990, 268, 977) present correlating fits of light scattering data which yield fstatic/UDLS = 0.5 0.3 (1.2 £DLS/ Static 4). One of us (YM) advocates (£DYNAMic/£sTATic)e ~ 3-3.5 under 0 conditions. The above estimates are for solutions under 0 or better than 0 conditions, but the present experiments lie well to the poor solvent side of 0 and this may affect the ratio. Viscosity corrected ratios, £DLS/£SANS, in Table 2b are below the lower limit of the range calculated from the light-scattering data for AC and CH, but near midrange for MCH solutions. A helpful comment from one reviewer points out the ratio should be close to 1, if the mesh size (which depends on c/c*) can be neglected.
27. See footnote b, Table 2.
28. Imre, A.; Melnichenko, G.; Van Hook, W. A. Phys. Chem.Chem. Phys. 1999, 1, 4287.
29. Yaws, C. L. Handbook of Viscosity; Gulf Publishing Co.: Houston, TX, 1995.
30. Bridgeman, P. W. The Physics of High Pressure; G. Bell and Sons: London, 1958.
31. Rabinovitch, I. B. Influence oflsotopy on the Physicochemical Properties of Liquids; Consultants Bureau: New York 1970.