Transitions/relaxations in polyester adhesive/PET system |
| |
Authors: | Elodie Carsalade Alain Bernès Colette Lacabanne Sophie Perraud Michel Lafourcade Michel Savignac |
| |
Affiliation: | 1.Laboratoire de Physique des Polymères, Université de Toulouse, CIRIMAT Institut Carnot, UMR CNRS 5085,Toulouse Cedex 09,France;2.CNES,Toulouse Cedex 09,France;3.Zodiac,Ayguesvives,France |
| |
Abstract: | The correlations between the transitions and the dielectric relaxation processes of the oriented poly(ethylene terephthalate) (PET) pre-impregnated of the polyester thermoplastic adhesive have been investigated by differential scanning calorimetry (DSC) and dynamic dielectric spectroscopy (DDS). The thermoplastic polyester adhesive and the oriented PET films have been studied as reference samples. This study evidences that the adhesive chain segments is responsible for the physical structure evolution in the PET-oriented film. The transitions and dielectric relaxation modes’ evolutions in the glass transition region appear characteristic of the interphase between adhesive and PET film, which is discussed in terms of molecular mobility. The storage at room temperature of the adhesive tape involves the heterogeneity of the physical structure, characterized by glass transition dissociation. Thus, the correlation between the transitions and the dielectric relaxation processes evidences a segregation of the amorphous phases. Therefore, the physical structure and the properties of the material have been linked to the chemical characteristics. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|