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Shape memory polymers with high and low temperature resistant properties

High temperature shape memory polymers that can withstand the harsh temperatures for durable applications are synthesized, and the aromatic polyimide chains with flexible linkages within the backbone act as reversible phase. High molecular weight (M(n)) is demanded to form physical crosslinks as fix...

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Detalles Bibliográficos
Autores principales: Xiao, Xinli, Kong, Deyan, Qiu, Xueying, Zhang, Wenbo, Liu, Yanju, Zhang, Shen, Zhang, Fenghua, Hu, Yang, Leng, Jinsong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4585657/
https://www.ncbi.nlm.nih.gov/pubmed/26382318
http://dx.doi.org/10.1038/srep14137
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author Xiao, Xinli
Kong, Deyan
Qiu, Xueying
Zhang, Wenbo
Liu, Yanju
Zhang, Shen
Zhang, Fenghua
Hu, Yang
Leng, Jinsong
author_facet Xiao, Xinli
Kong, Deyan
Qiu, Xueying
Zhang, Wenbo
Liu, Yanju
Zhang, Shen
Zhang, Fenghua
Hu, Yang
Leng, Jinsong
author_sort Xiao, Xinli
collection PubMed
description High temperature shape memory polymers that can withstand the harsh temperatures for durable applications are synthesized, and the aromatic polyimide chains with flexible linkages within the backbone act as reversible phase. High molecular weight (M(n)) is demanded to form physical crosslinks as fixed phase of thermoplastic shape memory polyimide, and the relationship between M(n) and glass transition temperature (T(g)) is explored. Thermoset shape memory polyimide shows higher T(g) and storage modulus, better shape fixity than thermoplastic counterpart due to the low-density covalent crosslinking, and the influence of crosslinking on physical properties are studied. The mechanism of high temperature shape memory effects based on chain flexibility, molecular weight and crosslink density is proposed. Exposure to thermal cycling from +150 °C to −150 °C for 200 h produces negligible effect on the properties of the shape memory polyimide, and the possible mechanism of high and low temperature resistant property is discussed.
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spelling pubmed-45856572015-09-29 Shape memory polymers with high and low temperature resistant properties Xiao, Xinli Kong, Deyan Qiu, Xueying Zhang, Wenbo Liu, Yanju Zhang, Shen Zhang, Fenghua Hu, Yang Leng, Jinsong Sci Rep Article High temperature shape memory polymers that can withstand the harsh temperatures for durable applications are synthesized, and the aromatic polyimide chains with flexible linkages within the backbone act as reversible phase. High molecular weight (M(n)) is demanded to form physical crosslinks as fixed phase of thermoplastic shape memory polyimide, and the relationship between M(n) and glass transition temperature (T(g)) is explored. Thermoset shape memory polyimide shows higher T(g) and storage modulus, better shape fixity than thermoplastic counterpart due to the low-density covalent crosslinking, and the influence of crosslinking on physical properties are studied. The mechanism of high temperature shape memory effects based on chain flexibility, molecular weight and crosslink density is proposed. Exposure to thermal cycling from +150 °C to −150 °C for 200 h produces negligible effect on the properties of the shape memory polyimide, and the possible mechanism of high and low temperature resistant property is discussed. Nature Publishing Group 2015-09-18 /pmc/articles/PMC4585657/ /pubmed/26382318 http://dx.doi.org/10.1038/srep14137 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Xiao, Xinli
Kong, Deyan
Qiu, Xueying
Zhang, Wenbo
Liu, Yanju
Zhang, Shen
Zhang, Fenghua
Hu, Yang
Leng, Jinsong
Shape memory polymers with high and low temperature resistant properties
title Shape memory polymers with high and low temperature resistant properties
title_full Shape memory polymers with high and low temperature resistant properties
title_fullStr Shape memory polymers with high and low temperature resistant properties
title_full_unstemmed Shape memory polymers with high and low temperature resistant properties
title_short Shape memory polymers with high and low temperature resistant properties
title_sort shape memory polymers with high and low temperature resistant properties
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4585657/
https://www.ncbi.nlm.nih.gov/pubmed/26382318
http://dx.doi.org/10.1038/srep14137
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