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<dc:title xml:lang="fr">Rationalisation du comportement contractile de matériaux polymériques photosensibles fondés sur des moteurs moléculaires synthétiques</dc:title>
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<dcterms:abstract xml:lang="fr">L’intégration de moteurs moléculaires comme noeuds de réticulation dans des réseaux polymériques permet d’exploiter leur rotation unidirectionnelle nanoscopique pour entraîner un changement de volume macroscopique du matériau. Nous avons étudié l’impact de plusieurs paramètres structuraux et environnementaux sur la rotation du moteur et les conséquences sur la cinétique de contraction de ces réseaux. Ainsi, nous avons pu isoler l’influence du solvant, de la température, de l’épaisseur, de la puissance lumineuse et de la masse moléculaire entre noeuds de réticulation. Nous avons également changé la nature chimique du polymère afin de comprendre l’impact de la longueur de persistance. L’utilisation d’autres macromolécules a aussi permis l’obtention du premier exemple de l’actuation d’un élastomère amorphe causée par le mouvement unidirectionnel de moteurs moléculaires, ainsi que le premier exemple de gel physique photosensible, thermiquement réversible, intégrant ces mêmes molécules.</dcterms:abstract>
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