Phase Transformation Characteristics in Polyoxadiazole

The article presents the research into the phase transformation characteristics in the semirigid polymer (poly-para-phenilen-oxadiasol (POD)) which are analyzed by using some physical-chemical methods. It discusses the determined temperature intervals during the phase transformation due to the polymer macromolecular chain structure. The possible manifestation of the crystal structure in its two types is considered. Competing phase transformation characteristics as well as different POD destruction processes are analyzed. Values of the thermodynamic parameters of these processes were calculated.

References

[1] Dresvyanina E.N. Vliyanie ekspluatatsionnykh vozdeystviy na svoystva vysokotermostoykikh polioksadiazol’nykh nitey arselon, arselon-S [Influence of Operational Impacts on the Properties of Highly Thermostable Arselon Polyoxadiazole Filaments, Arselon-C]. Avtoref. diss. kand. tekhn. nauk [Cand. tehn. sci. diss. abstr.]. SPb., 2008. 16 p.

[2] Beriketov A.S. Komp’yuternaya tekhnologiya konstruirovaniya khimicheskoy struktury i prognozirovanie svoystv termostoykikh polimerov [Computer Aided Technology for Designing Chemical Structure and Prediction of Heat-Resistant Polymer Properties]. Avtoreferat diss. doct. tekhn. nauk [Dr. tehn. sci. diss. abstr.]. Nal’chik, 2000. 47 p.

[3] High-Temperature Polyoxadiazole Fibers and Arselon Yarns, Arselon-C: Properties and Applications. Dizayn. Materialy. Tekhnologii [Design. Materials. Technology], 2008, no. 1, p. 53 (in Russ.).

[4] Byuller K.-U. Russ. ed.: Teplo- i termostoykie polimery [Heat-Resistant and High-Temperature Polymers]. Moscow, Khimiya Publ., 1984. 1056 p.

[5] Volokhina A.V. Modified Heat-Resistant Fibers. Review of VNIIPV. Khimicheskie volokna [Fibre Chemistry], 2003, no. 4, p. 49 (in Russ.).

[6] Pritykin L.M., Askadskiy A.A., Gal’pern E.G., Korshak V.V. On the Possibility of Assessing the Thermodynamic Flexibility of Macromolecules by the Cohesive Energy of Their Segments. Vysoko-molekulyarnye soedineniya [Polym. Sci., Ser. A], 1985, A27, no. 1, p. 24 (in Russ.).

[7] Perepechkin K.E., Dresvyanina E.N., Pakshver E.A. Thermal Characteristics of High Strength and Heat Resistant Aromatic Filaments. Khimicheskie volokna [Fibre Chemistry], 2008, no. 3, p. 72 (in Russ.).

[8] Perepechkin K.E., Makarova R.A., Dresvyanina E.N., Trusov D.Yu. High-Temperature Polyoxadiazole Fibers and Arselon Yarns: Production Principles, Properties and Application. Analytical Review. Khimicheskie volokna [Fibre Chemistry], 2004, no. 5, p. 8 (in Russ.).

[9] Romanko O.I. Computation of Main Kinetic Parameters of Polymer Relaxation. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Estestv. Nauki [Herald of the Bauman Moscow State Tech. Univ., Nat. Sci.], 2004, no. 2, p. 121 (in Russ.).

[10] Romanko O.I. Quantitative Thermal Analysis of Polymeric Systems. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Estestv. Nauki [Herald of the Bauman Moscow State Tech. Univ., Nat. Sci.], 2001, no. 2, p. 107 (in Russ.).

[11] Papkov S.P., Kalashnik A.T. Mechanisms and Kinetics of Phase Transitions in Hard Domain Polymers. Vysokomolekulyarnye soedineniya [Polym. Sci., Ser. A], 1984, 26A, no. 11, p. 2043 (in Russ.).