Journal
POLYMER
Volume 55, Issue 6, Pages 1552-1559Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2014.02.005
Keywords
Poly(pentamethylene terephthalate); Dielectric spectroscopy; Dynamics
Categories
Funding
- MINECO [MAT2008-03232, MAT2011-23455, MAT2012-33517]
- CSIC
- Fondo Social Europeo (FSE)
Ask authors/readers for more resources
The relaxation dynamics of poly(pentamethylene terephthalate) has been investigated by means of dielectric spectroscopy. The sub-glass dynamics is characterized by the existence of a bimodal beta process whose faster and slower components have been assigned to the relaxation of the bond between the ester oxygen and the aliphatic carbon and to the link between the aromatic ring carbon and the ester carbon, respectively. By comparison with other closely related aromatic polyesters it is shown that the faster component strongly depends on the amount of methylene groups while the slower one is not considerably affected by the nature of the glycol subunit. The changes in the a process associated to the segmental relaxation during cold crystallization reveal the formation of a rigid amorphous phase fraction. Combination of dielectric experiments with X-ray scattering ones suggests that during cold crystallization PPT crystal lamellae tend to fill the space homogeneously. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available