Phase equilibrium and rheology of poly(1-trimethylsilyl-1-propyne) solutions
- 53 Downloads
The phase equilibrium and rheological properties of poly(1-trimethylsilyl-1-propyne) solutions obtained with tantalum catalysts are studied. For three polymers with different molecular masses, phase diagrams are determined in a number of solvents. From these diagrams, the Hansen solubility parameters of poly(1-trimethylsilyl-1-propyne) are calculated by the method proposed in this work. Dilute solutions of poly(1-trimethylsilyl-1-propyne) behave as Newtonian liquids, whereas the viscosity of viscoelastic concentrated systems decreases as the shear rate grows. The molecular and rheological characteristics of studied poly(1-trimethylsilyl-1-propyne) samples are compared with the samples prepared with NbCl5 catalysts. Poly(1-trimethylsilyl-1-propyne) obtained with a catalytic system involving tantalum pentachloride is characterized by high intrinsic viscosity and solution viscosity compared to poly(1-trimethylsilyl-1-propyne) prepared with niobium catalyst. The difference in properties is due to the dissimilar ratios of cis and trans units in the samples.
Unable to display preview. Download preview PDF.
- 13.A. E. Grishchenko, V. S. Khotimsky, I. N. Shtennikova, G. F. Kolbina, EG. Litvinova, M. V. Chirkova, and N. A. Mikhailova, Polym. Sci., Ser. B 46 (1–2), 35 (2004).Google Scholar
- 20.A. Ya. Malkin and A. E. Chalykh, Diffusion and Viscosity of Polymers: Measurement Techniques (Khimiya, Moscow, 1979) [in Russian].Google Scholar
- 21.V. Makarova and V. Kulichikhin, Interferometry. Research and Applications in Science and Technology, Ed. by I. Padron (InTech., Rijeka, Croatia, 2012).Google Scholar
- 24.J. Hildebrand and R. L. Scott, Regular Solutions (Prentice-Hall, Englewood Cliffs, 1962).Google Scholar
- 34.I. N. Shtennikova, G. F. Kolbina, E. V. Korneeva, V. S. Khotimskii, and E. G. Litvinova, Russ. J. Appl. Chem. 71 (8), 1426 (1998).Google Scholar