ap8b00116_si_001.pdf (1.16 MB)
Shape Memory and Self-Healing Properties of Poly(acrylate amide) Elastomers Reinforced with Polyhedral Oligomeric Silsesquioxanes
journal contribution
posted on 2019-02-08, 16:10 authored by Sen Xu, Bingjie Zhao, Muhammad Adeel, Sixun ZhengThe
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.
History
Usage metrics
Categories
Keywords
POSS nanodomainsself-healing propertiesMAPOSSglass transition temperaturescopolymersPolyhedral Oligomeric SilsesquioxanesPAAAA5- acetylaminopentyl acrylatemicrophase-separatedformationacrylate amide groups3- methacryloxypropyl heptaphenyl polyhedral oligomeric silsesquioxaneshape memory propertiesshape memoryintramolecular hydrogen bonds
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC