Physical ageing reduction in PES through the incorporation of rigid non-interacting PTFE nanoparticles

•The effect of the addition of PTFE nanoparticles on the enthalpy relaxation of PES is investigated.•The rigid PTFE crystalline domains exert constraints on the PES segmental motions.•The activation energy increases and the enthalpy loss reduces as a consequence of the PTFE nanoparticles presence. T...

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Bibliographic Details
Published in:Thermochimica acta 2013-11, Vol.571, p.53-59
Main Authors: Righetti, Maria Cristina, Boggioni, Alessia, Laus, Michele, Antonioli, Diego, Sparnacci, Katia, Enrico, Emanuele, Boarino, Luca
Format: Article
Language:English
Subjects:
activation energy
Ageing
Aging
Crystal structure
Differential scanning calorimetry
Enthalpy
Glass transition
Glass transition temperature
Interfaces
Nanoparticles
Polytetrafluoroethylenes
Reduction
Strategy
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Summary:•The effect of the addition of PTFE nanoparticles on the enthalpy relaxation of PES is investigated.•The rigid PTFE crystalline domains exert constraints on the PES segmental motions.•The activation energy increases and the enthalpy loss reduces as a consequence of the PTFE nanoparticles presence. The enthalpy relaxation of PES in the presence of PTFE nanoparticles was investigated and discussed. The increase in the PES glass transition temperature with increasing the PTFE content was explained assuming a frictional effect exerted by the rigid PTFE domains on the PES segmental motions. The presence of constraints on the PES segmental motions caused by the PTFE crystalline domains was confirmed by the analysis of the enthalpy relaxation process. A significant increase in the activation energy and a reduction in the enthalpy lost during PES structural relaxation was observed as a consequence of the PTFE nanoparticles addition, which proves that a potential strategy to reduce physical ageing of non-equilibrium glasses could be the incorporation of rigid, even if non-interacting, fillers.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2013.09.029