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Shape Memory Properties of PBS-Silica Hybrids

A series of novel Si–O–Si crosslinked organic/inorganic hybrid semi-crystalline polymers with shape memory properties was prepared from alkoxysilane-terminated poly(butylene succinate) (PBS) by water-induced silane crosslinking under organic solvent-free and catalyst-free conditions. The hydrolyzati...

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Detalles Bibliográficos
Autores principales: Paderni, Katia, Fabbri, Paola, Toselli, Maurizio, Messori, Massimo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5453071/
https://www.ncbi.nlm.nih.gov/pubmed/28788486
http://dx.doi.org/10.3390/ma7020751
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author Paderni, Katia
Fabbri, Paola
Toselli, Maurizio
Messori, Massimo
author_facet Paderni, Katia
Fabbri, Paola
Toselli, Maurizio
Messori, Massimo
author_sort Paderni, Katia
collection PubMed
description A series of novel Si–O–Si crosslinked organic/inorganic hybrid semi-crystalline polymers with shape memory properties was prepared from alkoxysilane-terminated poly(butylene succinate) (PBS) by water-induced silane crosslinking under organic solvent-free and catalyst-free conditions. The hydrolyzation and condensation of alkoxysilane end groups allowed for the generation of silica-like crosslinking points between the polymeric chains, acting not only as chemical net-points, but also as inorganic filler for a reinforcement effect. The resulting networks were characterized using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic-mechanical analysis (DMA) and tensile and shape memory tests to gain insight into the relationship between the polymeric structure, the morphology and the properties. By controlling the molecular weight of the PBS precursor, a fine tuning of the crosslinking density and the inorganic content of the resulting network was possible, leading to different thermal, mechanical and shape memory properties. Thanks to their suitable morphology consisting of crystalline domains, which represent the molecular switches between the temporary and permanent shapes, and chemical net-points, which permit the shape recovery, the synthesized materials showed good shape memory characteristics, being able to fix a significant portion of the applied strain in a temporary shape and to restore their original shape above their melting temperature.
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spelling pubmed-54530712017-07-28 Shape Memory Properties of PBS-Silica Hybrids Paderni, Katia Fabbri, Paola Toselli, Maurizio Messori, Massimo Materials (Basel) Article A series of novel Si–O–Si crosslinked organic/inorganic hybrid semi-crystalline polymers with shape memory properties was prepared from alkoxysilane-terminated poly(butylene succinate) (PBS) by water-induced silane crosslinking under organic solvent-free and catalyst-free conditions. The hydrolyzation and condensation of alkoxysilane end groups allowed for the generation of silica-like crosslinking points between the polymeric chains, acting not only as chemical net-points, but also as inorganic filler for a reinforcement effect. The resulting networks were characterized using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic-mechanical analysis (DMA) and tensile and shape memory tests to gain insight into the relationship between the polymeric structure, the morphology and the properties. By controlling the molecular weight of the PBS precursor, a fine tuning of the crosslinking density and the inorganic content of the resulting network was possible, leading to different thermal, mechanical and shape memory properties. Thanks to their suitable morphology consisting of crystalline domains, which represent the molecular switches between the temporary and permanent shapes, and chemical net-points, which permit the shape recovery, the synthesized materials showed good shape memory characteristics, being able to fix a significant portion of the applied strain in a temporary shape and to restore their original shape above their melting temperature. MDPI 2014-01-27 /pmc/articles/PMC5453071/ /pubmed/28788486 http://dx.doi.org/10.3390/ma7020751 Text en © 2014 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Paderni, Katia
Fabbri, Paola
Toselli, Maurizio
Messori, Massimo
Shape Memory Properties of PBS-Silica Hybrids
title Shape Memory Properties of PBS-Silica Hybrids
title_full Shape Memory Properties of PBS-Silica Hybrids
title_fullStr Shape Memory Properties of PBS-Silica Hybrids
title_full_unstemmed Shape Memory Properties of PBS-Silica Hybrids
title_short Shape Memory Properties of PBS-Silica Hybrids
title_sort shape memory properties of pbs-silica hybrids
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5453071/
https://www.ncbi.nlm.nih.gov/pubmed/28788486
http://dx.doi.org/10.3390/ma7020751
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