OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Dynamic mechanical thermal analysis transitions of partially and fully substituted cellulose fatty esters

Vaca-Garcia, Carlos and Gozzelino, Giuseppe and Glasser, Wolfgang and Borredon, Marie-Elisabeth Dynamic mechanical thermal analysis transitions of partially and fully substituted cellulose fatty esters. (2002) Journal of Polymer Science Part B: Polymer Physics, 41 (3). 281-288. ISSN 0887-6266

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
195kB

Official URL: https://doi.org/10.1002/polb.10378

Abstract

The main transitions of cellulose fatty esters with different degrees of substitution (DSs) were investigated with dynamic mechanical thermal analysis. Two distinct main relaxations were observed in partially substituted cellulose esters (PSCEs). They were attributed to the glass‐transition temperature and to the chain local motion of the aliphatic substituents. The temperatures of both transitions decreased when DS or the number of carbon atoms (n) of the acyl substituent increased. Conversely, all the transitions of fully substituted cellulose esters occurred within a narrow temperature range, and they did not vary significantly with n. This phenomenon was explained by the formation of a crystalline phase of the fatty substituents. The presence of few residual OH groups in PSCEs was responsible for a large increase in the storage bending modulus, and it eliminated the effect of n on damping.

Item Type:Article
HAL Id:hal-02079769
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Other partners > Politecnico di Torino (ITALY)
Other partners > Virginia Polytechnic Institute and State University (USA)
Laboratory name:
Statistics:download
Deposited By: Yves MOMBOISSE
Deposited On:26 Mar 2019 10:43

Repository Staff Only: item control page