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Title
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Shape memory and self-healing properties of poly(acrylate amide) elastomers reinforced with polyhedral oligomeric silsesquioxanes
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Author
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Abstract
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| The organic−inorganic nanocomposite elastomers were synthesized via the random copolymerization of 5- acetylaminopentyl acrylate (AA) with 3-methacryloxypropyl heptaphenyl polyhedral oligomeric silsesquioxane (MAPOSS). The morphological results showed that the random copolymers were microphase-separated and the POSS structural units were aggregated into the nanodomains that were composed of tens of silsesquioxane cages. Compared to neat PAA, the organic−inorganic copolymers possessed enhanced glass transition temperatures and improved mechanical strengths. Most importantly, the organic− inorganic copolymers simultaneously had shape memory and self-healing properties. The shape memory properties can be attributed to the formation of physical cross-linking in the random copolymers; in the physically cross-linked network, the POSS nanodomains constituted the net points. The self-healing properties are responsible for the dynamic exchange of the intramolecular hydrogen bonds among acrylate amide groups in spite of the nanoreinforcement of POSS nanodomains. The formation of microphase-separated morphologies is critical for the organic−inorganic copolymers simultaneously to have the shape memory and self-healing properties. |
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Language
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English
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Source (journal)
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ACS applied polymer materials. - Washington, DC, 2019, currens
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Publication
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Washington, DC
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American Chemical Society
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2019
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ISSN
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2637-6105
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DOI
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10.1021/ACSAPM.8B00116
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Volume/pages
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1
:3
(2019)
, p. 359-368
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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