The crystallization behavior of poly(ethylene 2,6-naphthalate)/poly(trimethylene terephthalate) (PEN/PTT) blends is investigated by scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The isothermal crystallization kinetics of PEN/PTT blends is analyzed from 220° to 240°C using the Avrami equation for various compositions. The results of DMA indicate that PEN/PTT blends are immiscible. Nevertheless, small amounts of PTT can increase the crystallization rate of PEN and reduce the amount of less perfect PEN crystals in PEN/PTT blends.
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References
1.
Buchner, S. , Wiswe, D. , and Zachmann, H. G. , Kinetics of Crystallization and Melting Behaviour of Poly(ethylene naphthalene-2,6-dicarboxylate) , Polymer30, 480-488 (1989).
2.
Cakmak, M. , Wang, Y. D. , and Simhambhatla, M. , Processing Characteristics, Structure Development, and Properties of Uni and Biaxially Stretched Poly(Ethylene 2,6 Naphthalate) (PEN) Films , Polym. Eng. Sci.30, 721-733 (1990).
3.
Cheng, Y.-Y. , Brillhart, M. , and Cebe, P. , X-Ray Scattering and Thermal Analysis Study of the Effects of Molecular Weight on Phase Structure in Blends of Poly(butylenes terephthalate) with Polycarbonate , J. Polym. Sci. Polym. Phy.34, 2953-2965 (1996).
4.
Chuah, H. H. , Orientation and Structure Development in Poly(trimethylene terephthalate) Tensile Drawing , Macromolecules34, 6985-6993 (2001).
5.
Chuah, H. H. , Crystallization Kinetics of Poly(trimethylene terephthalate) , Polym. Eng. Sci.41, 308-313 (2001).
6.
Grebowicz, J. S. , Brown, H. , Chuah, H. , Olvera, J. M. , Wasiak, A. , Sajkiewicz, P. , and Ziabicki, A. , Deformation of Undrawn Poly(trimethylene terephthalate) (PTT) Fibers , Polymer42, 7153-7160 (2001).
7.
Hong, P.-D. , Chung, W.-T. , and Hsu, C.-F. , Crystallization Kinetics and Morphology of Poly(trimethylene terephtha-late) , Polymer43, 3335-3343 (2002).
8.
Ihm, D. W. , Park, S. Y. , Chang, C. G. , Kim, Y. S. , and Lee, H. K. , Miscibility of Poly(ethylene terephthalate)/Poly-(ethylene 2,6-naphthalate) Blends by Transesterification , J. Polym. Sci. Polym. Chem.34, 2841-2850 (1996).
9.
Ito, M. , Takahashi, M. , and Kanamoto, T. , Uniaxial Orientation and Tensile Properties of Poly(ethylene terephthalate)/Poly(ethylene-2, 6-naphthalate) blends , Polymer43, 3675-3681 (2002).
10.
Lee, S. C. , Yoon, K. H. , Park, I. H. , Kim, H. C. , and Son, T. W. , Phase Behaviour and Transesterification in Poly-(ethylene 2,6-naphthalate) and Poly(ethylene terephtha-late) Blends , Polymer38, 4831-4835 (1997).
11.
Light, R. R. , and Seymour, R. W. , Effect of Sub-Tg Relaxations on the Gas Transport Properties of Polyesters , Polym. Eng. Sci.22, 857-864 (1982).
12.
Pyda, M. , Boller, A. , Grebowicz, J. , Chuah, H. , Lebedev, B. V. , and Wunderich, B. , Heat Capacity of Poly(trimethylene terephthalate) , J. Polym. Sci. Polym. Phys. Ed.36, 2499-2511 (1998).
Shi, Y. , and Jabarin, S. A. , Glass-Transition and Melting Behavior of Poly(ethylene terephthalate)/Poly(ethylene 2,6-naphthalate) Blends , J. Appl. Polym. Sci.81, 11-22 (2001).
15.
Sperling, L. H. , “Introduction to Physical Polymer Science,”2nd ed, John Wiley & Sons, Inc., NY , 1992, pp. 234, 357.
16.
Stephen, Z. D. Cheng , and Wunderlich, B. , Glass Transition and Melting Behavior of Poly(ethylene 2,6-naphtha-lenedicarboxylate) , Macromolecules21, 789-797 (1988).
17.
Ward, I. M. , and Wilding, M. A. , The Mechanical Properties and Structure of Poly(m-methylene Terephthalate) Fibers , J. Polym. Sci. Polym. Phys. Ed.14, 263-274 (1976).
