Abstract
Temperature and pressure dependencies of shear and elongational viscosities were examined using rotational and capillary rheometers. Two different batches of the same polymer grade have shown that the molecular structure diversion significantly influences the magnitudes of pressure coefficients, which vary more than the temperature coefficients. The pressure effect on viscosity notably depends on the amount of long-chain branching in polymer. Further, the paper shows that pVT data analysis via the Simha-Somcynsky equation of state can be employed to reveal differences in temperature and pressure viscosity dependencies through the free volume fraction.
References
1Couch, M. A., Binding, D. M.: Polymer41, p. 6323 (2000)10.1016/S0032-3861(99)00865-4Search in Google Scholar
2Sedlacek, T., Zatloukal, M., Filip, P., Boldizar, A., Saha, P.: Polym. Eng. Sci. 44, p. 1328 (2004)10.1002/pen.20128Search in Google Scholar
3Penwell, R. C., Porter, R. S., Middleman, S.: J. Polym. Sci. 9, p. 731 (1971)10.1002/pol.1971.160090412Search in Google Scholar
4Kadijk, S. E., van den Brule, B. N. A. A.: Polym. Eng. Sci. 34, p. 1535 (1994)10.1002/pen.760342004Search in Google Scholar
5Jacovic, M. S., Pollock, D., Porter, R. S.: J. Appl. Polym. Sci. 23, p. 517 (1979)10.1002/app.1979.070230222Search in Google Scholar
6Starck, P., Lindberg, J. J.: Angew. Makrom. Chem. 75, p. 1 (1979)10.1002/apmc.1979.050750101Search in Google Scholar
7Kim, Y. S., Chung, C. I., Lai, S. Y., Hyun, K. S.: J. Appl. Polym. Sci. 59, p. 125 (1996)10.1002/(SICI)1097-4628(19960103)59:1<125::AID-APP18>3.0.CO;2-ZSearch in Google Scholar
8Robertson, Ch. G., Garcia-Franco, C. A., Srinivas, S.: J. Polym. Sci.,: Part B: Polym. Phys. 42, p. 1671 (2004)10.1002/polb.20038Search in Google Scholar
9Cogswell, F. N.: Polymer Melt Rheology. A Guide for Industrial Practice. Woodhead Publishing, Cambridge (1994)10.1533/9780857092984Search in Google Scholar
10Zatloukal, M., Kopytko, W., Lengalova, A., Vlcek, J.: J. Appl. Polym. Sci. 98, p. 153 (2005)10.1002/app.22030Search in Google Scholar
11Laun, H. M., Schuch, H.: J. Rheol. 33, p. 119 (1989)10.1122/1.550058Search in Google Scholar
12Gabriel, C., Münstedt, H.: Rheol. Acta41, p. 232 (2002)10.1007/s00397-001-0219-6Search in Google Scholar
13Gabriel, C., Münstedt, H.: J. Rheol. 47, p. 619 (2003)10.1122/1.1567752Search in Google Scholar
14Zatloukal, M., Vlcek, J., Tzoganaki, C., Saha, P.: J. Non-Newt. Fluid Mech. 107, p. 13 (2002)10.1016/S0377-0257(02)00111-8Search in Google Scholar
15Barnes, H. A., Roberts, G. P.: J. of Non-Newtonian Fluid Mech. 44, p. 113 (1992)10.1016/0377-0257(92)80047-2Search in Google Scholar
16Simha, R., Somcynsky, T.: Macromolecules2, p. 342 (1969)10.1021/ma60010a005Search in Google Scholar
17Simha, R.: Macromolecules10, p. 1025 (1977)10.1021/ma60059a028Search in Google Scholar
18Curro, J. G., Lagasse, R. R., Simha, R.: Macromolecules15, p. 1621 (1982)10.1021/ma00234a032Search in Google Scholar
19Jain, R. K., Simha, R.: Macromolecules22, p. 464 (1989)10.1021/ma00191a084Search in Google Scholar
20Carri, B. A., Simha, R.: J. Colloid Interface Sci. 178, p. 483 (1996)10.1006/jcis.1996.0143Search in Google Scholar
21Rudolf, B., Ougizawa, T., Inoue, T.: Polymer39, p. 873 (1998)10.1016/S0032-3861(97)00356-XSearch in Google Scholar
22Jain, R. K., Simha, R.: J. Colloid Interface Sci. 216, p. 424 (1999)10.1006/jcis.1999.6316Search in Google Scholar PubMed
23Cogswell, F. N.: Polym. Eng. Sci. 12, p. 64 (1972)10.1002/pen.760120111Search in Google Scholar
24Cox, W. P., Merz, E. H.: J. Polym. Sci. 28, p. 619 (1958)10.1002/pol.1958.1202811812Search in Google Scholar
25Simha, R., Wilson, P. S., Olabisi, O.: Kolloid-Z. Z. Polym. 251, p. 402 (1973)10.1007/BF01498686Search in Google Scholar
26Utracki, L. A., Simha, R.: Macromol. Theory Simul. 10, p. 17 (2001)10.1002/1521-3919(20010101)10:1<17::AID-MATS17>3.0.CO;2-BSearch in Google Scholar
27Utracki, L. A.: Polym. Eng. Sci. 23, p. 446 (1983)10.1002/pen.760230806Search in Google Scholar
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