Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5186214 | Polymer | 2006 | 7 Pages |
Abstract
The dynamic behaviour of a set of copolyesters made of 1,4-butanediol, terephthalic acid and 5-tert-butyl isophthalic acid, as well as the two parent homopolymers was studied. Although the insertion of the tert-butyl isophthalate units in the main chain of poly(butylene terephthalate) modified the glass transition, the β relaxation did not change dramatically. By using broadband dielectric spectroscopy we have obtained a detailed picture of the dynamic behaviour of these systems. In all cases, a strong correlation between the α relaxation and the β relaxation above Tg was observed in accordance with recent proposals based on the coupling model.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Aurora Nogales, Alejandro Sanz, Tiberio A. Ezquerra, Robert Quintana, Sebastian Muñoz-Guerra,