Oxidation induced changes in viscoelastic properties of a thermostable epoxy matrix

Abstract : The thermal ageing of a neat epoxy matrix has been studied at 200°C in air by three complementary analytical techniques: optical microscopy, mechanical spectrometry and nano-indentation. Thermal oxidation is restricted in a superficial layer of about 195 µm of maximal thickness. It consists in a predominant chain scission process involving, in particular, chemical groups whose β motions have the highest degree of cooperativity and thus, are responsible for the high temperature side of β dissipation band. As a result, chain scissions decrease catastrophically the glass transition temperature, but also increase significantly the storage modulus at glassy plateau between Tβ and Tα. This phenomenon is called "internal antiplasticization". Starting from these observations, the Di Marzio and Gilbert's theories have been used in order to establish relationships between the glass transition temperature and number of chain scissions, and between the storage modulus and β transition activity respectively. The challenge is now to establish a relationship between the transition activity and the concentration of the corresponding chemical groups
Complete list of metadatas

Cited literature [21 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01001693
Contributor : Compte de Service Administrateur Ensam <>
Submitted on : Wednesday, June 4, 2014 - 4:52:54 PM
Last modification on : Wednesday, June 12, 2019 - 5:03:16 PM
Long-term archiving on : Thursday, September 4, 2014 - 1:06:24 PM

File

PIMM-PS-TEREKHINA-2013.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Svetlana Terekhina, Marion Mille, Bruno Fayolle, Xavier Colin. Oxidation induced changes in viscoelastic properties of a thermostable epoxy matrix. Polymer Science Series A / Vysokomolekulyarnye Soedineniya, Ser. A., MAIK Nauka/Interperiodica, 2013, 55, pp.614-624. ⟨10.1134/S0965545X13090058⟩. ⟨hal-01001693⟩

Share

Metrics

Record views

260

Files downloads

340