Fragility of short‐chain poly(lactic acid)s derivatives by combining dielectric spectroscopy and fast scanning calorimetry

Low‐molecular‐mass bio‐polyesters, such as lactic acid oligomers, constitute a growing category of plasticizers for poly (lactic acid), since they show good compatibility and are respectful of the environment. This study focuses on the glass transition of a series of oligomers with different molecul...

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Published in:Journal of polymer science 2021-07, Vol.59 (14), p.1571-1577
Main Authors: Moghaddam, Sareh Mahmoudian, Quelennec, Blandine, Delpouve, Nicolas, Atawa, Bienvenu, Delbreilh, Laurent, Saiter–Fourcin, Allisson, Passaglia, Elisa, Fiori, Stefano
Format: Article
Language:English
Subjects:
Condensed Matter
cooperativity
DSC
Engineering Sciences
Fragility
Glass transition
Heat measurement
Materials
Materials Science
Molecular weight
Oligomers
Physics
PLA
Polyester resins
Polylactic acid
relaxation
Soft Condensed Matter
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cited_by cdi_FETCH-LOGICAL-c3790-4818edb3e2da3a03d315af8d26c77b267601af60e97f29d4daa9c34bf1cf61a53
cites cdi_FETCH-LOGICAL-c3790-4818edb3e2da3a03d315af8d26c77b267601af60e97f29d4daa9c34bf1cf61a53
container_end_page 1577
container_issue 14
container_start_page 1571
container_title Journal of polymer science
container_volume 59
creator Moghaddam, Sareh Mahmoudian
Quelennec, Blandine
Delpouve, Nicolas
Atawa, Bienvenu
Delbreilh, Laurent
Saiter–Fourcin, Allisson
Passaglia, Elisa
Fiori, Stefano
description Low‐molecular‐mass bio‐polyesters, such as lactic acid oligomers, constitute a growing category of plasticizers for poly (lactic acid), since they show good compatibility and are respectful of the environment. This study focuses on the glass transition of a series of oligomers with different molecular weights, with the aim of investigating how their associated dynamics occur. Dielectric and calorimetric results are combined to study the molecular mobility in a large temperature range. In comparison with poly (lactic acid), the oligomers exhibit a lower fragility index and smaller cooperative rearranging regions. Among oligomers, the fragility is clearly dependent on the molecular weight, whereas the variations of the cooperativity are subtler.
doi_str_mv 10.1002/pol.20210129
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source Wiley-Blackwell Read & Publish Collection
subjects Condensed Matter
cooperativity
DSC
Engineering Sciences
Fragility
Glass transition
Heat measurement
Materials
Materials Science
Molecular weight
Oligomers
Physics
PLA
Polyester resins
Polylactic acid
relaxation
Soft Condensed Matter
title Fragility of short‐chain poly(lactic acid)s derivatives by combining dielectric spectroscopy and fast scanning calorimetry
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