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Fracture behavior of heat treated liquid crystalline polymers

Published online by Cambridge University Press:  05 March 2013

A. Reyes-Mayer ,
B Alvarado-Tenorio ,
A Romo-Uribe ,
O Flores ,
B Campillo  and
M Jaffe
A. Reyes-Mayer
Affiliation:
Laboratorio de Nanopolimeros y Coloides, Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca, Mor. 62210, MEXICO.
B Alvarado-Tenorio
Affiliation:
Laboratorio de Nanopolimeros y Coloides, Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca, Mor. 62210, MEXICO.
A Romo-Uribe*
Affiliation:
Laboratorio de Nanopolimeros y Coloides, Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca, Mor. 62210, MEXICO.
O Flores
Affiliation:
Laboratorio de Nanopolimeros y Coloides, Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca, Mor. 62210, MEXICO.
B Campillo
Affiliation:
Laboratorio de Nanopolimeros y Coloides, Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Cuernavaca, Mor. 62210, MEXICO.
M Jaffe
Affiliation:
New Jersey Institute of Technology, Newark NJ, U.S.A.
*
*To whom correspondence should be addressed: aromo-uribe@fis.unam.mx
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Abstract

Thermotropic polymers are thermally treated in air at temperatures Ta, where ΔT =Ta- Ts→n=40°C, and Ts→n is the solid-to-nematic transition. Samples are extruded thin films of a series of thermotropic random copolyesters termed B-N, COTBP and RD1000. The thermal treatment produces a second endotherm without changing Ts→n for B-N and RD1000. However, for COTBP Ts→n is significantly increased. Regardless of the complex thermal behavior exhibited by the thermotropes, the thermal treatment produces a significant increase in Young's modulus, more than 30% for B-N and over 100% for COTBP. The increase in mechanical modulus is correlated with a thermally-induced fiber-like morphology.

Keywords

fracturepolymerkinetics
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1485: Symposium 7D – Advanced Structural Materials—2012 , 2012 , pp. 137 - 142
Copyright
Copyright © Materials Research Society 2013 

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References

REFERENCES

Sawyer, L.C., Linstid, H.C. and Romer, M., Plastics Engineering 54, 37 (1998).Google Scholar
Donald, A.M. and Windle, A.H., Liquid Crystalline Polymers, 2 nd ed. (Cambridge: Cambridge University Press, 1992).Google Scholar
Cakmak, M., Teitge, A., Zachmann, H.G. and White, J.L., J. Polym. Sci. Poly. Phys. 31, 371 (1993).CrossRefGoogle Scholar
Romo-Uribe, A., Proc. R. Soc. Lond. A457, 207 (2001).CrossRefGoogle Scholar
Collins, T.L.D., Davies, G.R. and Ward, I.M., Polym. Adv. Tech. 12, 544 (2001).CrossRefGoogle Scholar
Romo-Uribe, A., Alvarado-Tenorio, B., Romero-Guzman, M.E., Rejon, L. and Saldivar-Guerrero, R., Polym. Adv. Techn. 20, 759 (2009).CrossRefGoogle Scholar
Salahshoor-Kordestani, S., Hanna, S. and Windle, A.H.. Polymer. 41, 6619 (2000).CrossRefGoogle Scholar
Reyes-Mayer, A., Constant, A., Romo-Uribe, A. and Jaffe, M.. Mater. Res. Soc. Symp. Proc. 1373 DOI: 10.1557/opl.2012.317 (2012).Google Scholar
Romo-Uribe, A., Alvarado-Tenorio, B. and Romero-Guzmán, M.E., Rev. LatinAm. Metal. Mat. 30, 190 (2010).Google Scholar
Blackwell, J., Gutierrez, G.A. and Chivers, R.A., Macromolecules. 17, 1219 (1984).CrossRefGoogle Scholar
Romo-Uribe, A., Lemmon, T.J. and Windle, A.H., J. Rheol. 41, 1117 (1997).CrossRefGoogle Scholar
Chung, T.S., Cheng, M., Goh, S.H., Jaffe, M. and Calundann, G.W., J. Appl. Polym. Sci. 72, 1139 (1999).3.0.CO;2-O>CrossRefGoogle Scholar
Chung, T.S., Cheng, M., Pallathadka, P.K. and Goh, S.H., Polym. Eng. Sci. 39, 953 (1999).CrossRefGoogle Scholar