Extended-Chain Crystals of High-Pressure Crystallized Poly (Ethylene Terephthalate) Oligomer/Bisphenol-A Polycarbonate Blends

Abstract:

In this study, the crystallization behaviors of the poly (ethylene terephthalate) oligomer/bisphenol-A polycarbonate (PETO/BAPC) blends were investigated under high pressure, and the recovered PETO/BAPC samples were characterized using XRD, DSC, SEM and AFM. The results showed that high-quality extended-chain single crystals with large c-axis thickness were formed in the multi-phase system within a relative short time, and the inner defects of the disclosed crystals could be removed by a self-healing process through high-temperature and high-pressure annealing. Morphologies of extended-chain crystals with different characteristics were also revealed with SEM and AFM. Wedge-shaped and bent extended-chain morphologies suggested that sliding diffusion and transesterification occurred simultaneously in the system, and the crystallization of the large crystals was a self-assembling process induced by chemical reactions at high pressure. This process provides a new route to grow large polymer extended-chain crystals and suggests self-assembly under high pressure is a promising method to create materials with new structures and properties.

• Periodical: Materials Science Forum (Volumes 654-656)
• Pages: 2632-2635
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.654-656.2632
• Online since: June 2010
• Authors: Jun Lu, Dai Kun Xi, Rui Huang
• Keywords: Extended-Chain Crystal, Growth, High-Pressure, Polyester, Self-Assembly

References

[1] T. Hattori, M. Hikosaka and H. Ohigashi: Polymer Vol. 37 (1996), p.85.

[2] J. Lu, R. Huang, L.B. Li and J.B. Luo: Macromol. Rapid Comm. Vol. 26 (2005), p.1478.

[3] J. Lu, R. Huang, Y. Chen and L.B. Li: J. Polym. Sci. Pol. Phys. Vol. 44 (2006), p.3148.

[4] B.B. He: Powder Diffr. Vol. 18 (2003), p.71.