Abstract.
Broadband dielectric spectroscopy has been used to characterize in deep the relaxation behavior of novel bio-based aliphatic-aromatic block copolymers based on poly(butylene terephthalate) (PBT) and poly(lactic acid) (PLA). The results indicate that the copolymerization decreases the ability to crystallize of the resulting block copolymer. The \(\alpha\) relaxation of the block copolymers is consistent with this fact exhibiting initially the characteristics features of an amorphous polymeric material cold crystallizing upon heating. The cold crystallization can be easily visualized by dielectric spectroscopy by a discontinuous and abrupt change of the shape parameters of the \(\alpha\) relaxation. The sub-glass dynamics of the block copolymers is complex and be ascribed to a \(\beta\) relaxation composed of two local modes, \(\beta_{1}\) and \( \beta_{2}\), which can be assigned to the relaxation in PBT of the bond between the ester oxygen and the aliphatic carbon and to the bond between the aromatic ring carbon to the ester carbon, respectively. With increasing amount of the PLA block the crystallinity decreases as well as the activation energy of the \( \beta_{1}\) mode approaching the expected value for amorphous PBT. On the contrary, the activation energy for the \( \beta_{2}\) exhibits an unexpected increase as the amount of PLA increases. This effect has been explained by considering that at lower temperatures the \( \beta_{2}\) mode of PBT is the more significant while at higher temperatures the \( \beta\) relaxation of the PLA block becomes the dominant one.
Graphical abstract
Similar content being viewed by others
References
S. Fakyrov (Editor), Handbook of Condensation Thermoplastic Elastomers (Wiley-VCH, Weinheim, Germany, 2005)
Z. Roslaniec, T.A. Ezquerra, F.J. Baltacalleja, Colloid Polym. Sci. 273, 58 (1995)
C. Alvarez, M.J. Capitan, A. Alizadeh, Z. Roslaniec, T.A. Ezquerra, Macromol. Chem. Phys. 203, 556 (2002)
A. Nogales, A. Sanz, T.A. Ezquerra, R. Quintana, S. Munoz-Guerra, Polymer 47, 7078 (2006)
A. Szymczyk, T.A. Ezquerra, Z. Roslaniec, J. Macromol. Sci.-Phys. B 40, 685 (2001)
Z. Roslaniec, D. Pietkiewicz, in Handbook of Thermoplastic Polyesters, edited by Stoyko Fakirov, Vol. 1 (Wiley-VCH, Weinheim, Germany, 2012) p. 581
S. Kalia, L. Avérous, Biodegradable and Biobased Polymers for Environmental and Biomedical Applications (John Wiley & Sons Hoboken, NJ, USA, 2016)
L. Genovese, M. Soccio, N. Lotti, A. Munari, A. Szymczyk, S. Paszkiewicz, A. Linares, A. Nogales, T.A. Ezquerra, Phys. Chem. Chem. Phys. 20, 15696 (2018)
D. Cohn, H. Younes, J. Biomed. Mater. Res. 22, 993 (1988)
E. Piesowicz, I. Irska, M. Bratychak, Z. Roslaniec, Polimery 60, 680 (2015)
I. Irska, S. Paszkiewicz, K. Goracy, A. Linares, T.A. Ezquerra, R. Jedrzejewski, Z. Rosłaniec, E. Piesowicz, to be published in Express Polym. Lett. (2019)
U.W. Gedde, D. Buerger, R.H. Boyd, Macromolecules 20, 988 (1987)
B.B. Sauer, P. Avakian, H.W. Starkweather, B.S. Hsiao, Macromolecules 23, 5119 (1990)
J. Runt, L. Du, L.M. Martynowicz, D.M. Brezny, M. Mayo, Macromolecules 22, 3908 (1989)
Z. Denchev, A. Nogales, T.A. Ezquerra, J. Fernandes-Nascimento, F.J. Balta-Calleja, J. Polym. Sci. Part B: Polym. Phys. 38, 1167 (2000)
D.J. Blundell, B.N. Osborn, Polymer 24, 953 (1983)
S. Havriliak, S. Negami, Polymer 8, 161 (1967)
F. Kremer, A. Schonhals (Editors), Broadband Dielectric Spectroscopy (Springer Verlag, Heidelberg, Germany, 2002)
A. Sanz, A. Nogales, T.A. Ezquerra, N. Lotti, A. Munari, S.S. Funari, Polymer 47, 1281 (2006)
M. Soccio, A. Nogales, M.C. Garcia-Gutierrez, N. Lotti, A. Munari, T.A. Ezquerra, Macromolecules 41, 2651 (2008)
M. Soccio, A. Nogales, T.A. Ezquerra, N. Lotti, A. Munari, Macromolecules 45, 180 (2012)
M. Yokouchi, Y. Sakakibara, Y. Chatani, H. Tadokoro, T. Tanaka, K. Yoda, Macromolecules 9, 266 (1976)
E. Bornschlegl, R. Bonart, Colloid Polym. Sci. 258, 319 (1980)
T. Konishi, Y. Miyamoto, Polym. J. 42, 349 (2010)
G. Stoclet, R. Seguela, J.M. Lefebvre, C. Rochas, Macromolecules 43, 7228 (2010)
S.U. Boyd, R.H. Boyd, Macromolecules 34, 7219 (2001)
M. Soccio, A. Nogales, I. Martin-Fabiani, N. Lotti, A. Munari, T.A. Ezquerra, Polymer 55, 1552 (2014)
J.C. Coburn, R.H. Boyd, Macromolecules 19, 2238 (1986)
T.A. Ezquerra, F. Liu, R.H. Boyd, B.S. Hsiao, Polymer 38, 5793 (1997)
I. Martin-Fabiani, A. Linares, A. Nogales, T.A. Ezquerra, Polymer 54, 5892 (2013)
S.P. Bravard, R.H. Boyd, Macromolecules 36, 741 (2003)
N.G. McCrum, B.E. Read, G. Williams, Anelastic and Dielectric Effects in Polymeric Solids (John Wiley and Sons, New York, 1967)
A. Nogales, Z. Denchev, I. Sics, T.A. Ezquerra, Macromolecules 33, 9367 (2000)
F. Henry, L.C. Costa, M. Devassine, Eur. Polym. J. 41, 2122 (2005)
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher’s Note
The EPJ Publishers remain neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Irska, I., Linares, A., Piesowicz, E. et al. Dielectric spectroscopy of novel bio-based aliphatic-aromatic block copolymers: Poly(butylene terephthalate)-b-poly(lactic acid). Eur. Phys. J. E 42, 107 (2019). https://doi.org/10.1140/epje/i2019-11874-y
Received:
Accepted:
Published:
DOI: https://doi.org/10.1140/epje/i2019-11874-y