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Optimization of mechanical and dielectric properties of poly(urethane–urea)-based dielectric elastomers via the control of microstructure
In this work, we fabricated novel poly(urethane–urea) (PUU)-based dielectric elastomers using a hydroxylterminated butadiene–acrylonitrile copolymer (HTBN) as the soft segment and hexamethylene diisocyanate (HDI) and 3,30-dimethyl-4,40-diamino dicyclohexyl methane (DMDC) as hard segments. The effect of hard segment (HS) content on the hard domain (HD) structure, morphology, dielectric and mechan...
http://www.polymer.cn//ss/yrliang/publicationsshow_12411.html |
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Preparation and electrodeformation of silicone dielectric elastomers containing poly(propylene glycol diacetate) with different molecular weights
In this study, poly(propylene glycol diacetate)s (PPGDAs) with different molecular weights were obtained by the esterification reaction of poly(propylene glycol) and acetic anhydride. We effectively reduced the residual moisture and hydrophilicity of PPGDA. Then, poly(dimethyl siloxane) (PDMS) was modified by the addition of only 5 wt % PPGDA, which possessed a high dielectric constant (k) and a l...
http://www.polymer.cn//ss/zhangming/publicationsshow_11857.html |
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Property reinforcement of silicone dielectric elastomers filled with self-prepared calcium copper titanate particles
In this article, submicron and micron calcium copper titanate (CCTO) crystallites with different morphologies were successfully designed and prepared by directly thermal treatment method and molten salt method, respectively. Then, the silicone elastomer filled with self-prepared CCTO particles had high dieletric constant, low dielectric loss, and actuated strain which was greatly improved at low e...
http://www.polymer.cn//ss/zhangming/publicationsshow_10470.html |
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Preparation of π-conjugated truxene/silicone dielectric elastomers with large actuated strain at low electric field
In this paper, we report an effective method for the preparation of polydimethyl siloxane (PDMS) containing only 0.5 wt % π-conjugated truxene micromolecule. The as-prepared truxene/PDMS composite had high dieletric constant (k) due to the regularly rigid structures, special π-conjugated structure and monodisperse nature of truxene, which can form a large no. of parallel micro-capacitors under a...
http://www.polymer.cn//ss/zhangming/publicationsshow_10462.html |
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(Polym. Chem.) A Room-Temperature Two-Stage Thiol-Ene Photoaddition Approach towards Monodomain Liquid Crystalline Elastomers
Monodomain liquid crystalline elastomers (LCEs)
with anisotropic, loosely crosslinked polymeric matrices, have attracted intense scientific attention due
to their widespread applications in stimuli-responsive soft actuators.
However, traditional synthetic pathways towards monodomain LCEs require complicated
procedures, elevated
reaction temperatures, and p...
http://www.polymer.cn//ss/yangh/publicationsshow_10067.html |
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25. Biobased Plastics and Elastomers from Renewable Rosin via “Living” Ring-Opening Metathesis Polymerization
Utilization of biomass for commodity polymers has gained tremendous interest. We report a method to prepare high molecular weight renewable homopolymers and block copolymers derived from natural rosin. Monomers with high renewable content (70 wt %) were prepared via a simple esterification reaction between dehydroabietic alcohol and 5-exo-norbornenecarboxylic acid. Livin...
http://www.polymer.cn//ss/wangzhongkai/publicationsshow_9720.html |
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(Macromolecules) Near-Infrared Responsive Liquid Crystalline Elastomers Containing Photothermal Conjugated Polymers
In this work, we report the ?rst example of uniaxial aligned conjugated polymer (CP)/liquid crystalline elastomer (LCE) composite material by doping polyaniline nanoparticles into a classical monodomain polysiloxane-based LCE matrix. A series of comparative experiments are performed to investigate the photoresponsive properties of these polyaniline/LCE samples in correspondence to the two di...
http://www.polymer.cn//ss/yangh/publicationsshow_9372.html |
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Bioinspired design of nanostructured elastomers with crosslinked soft matrix grafting on the oriented rigid nanofibers to mimic mechanical properties of human skin
Human skin exhibits highly nonlinear elastic properties that are essential to its physiological functions. It is soft at low strain but stiffat high strain, thereby protecting internal organs and tissues from mechanical trauma. However, to date, the development of materials to mimic the unique mechanical properties of human skin is still a great challenge. Here wereporta...
http://www.polymer.cn//ss/wangzhongkai/publicationsshow_9039.html |
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(Macromolecules) Polysiloxane-Based Liquid Crystalline Polymers and Elastomers Prepared by Thiol-Ene Chemistry
A series
of side-chain liquid crystalline polymers (LCPs) with polysiloxane backbones
have been synthesized by grafting mesogenic monomers to
poly[3-mercaptopropylmethylsiloxane] (PMMS) via thiol-ene click chemistry. Moreover, by controlling the molar ratio of PMMS and
mesogenic monomers, PMMS-based LCPs can be
partially functionalized, meanwhile leaving spare mercapto groups, which can be
fu...
http://www.polymer.cn//ss/yangh/publicationsshow_8429.html |
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(J. Mater. Chem. C) Mesogen-Jacketed Liquid Crystalline Polymers and Elastomers Bearing Polynorbornene Backbone
This
manuscript describes a series of mesogen-jacketed liquid crystalline polymers
(MJLCPs) and elastomers (MJLCEs) bearing a novel polynorbornene backbone, onto
which the liquid crystalline mesogen is laterally attached by a single covalent
bond without spacers.
http://www.polymer.cn//ss/yangh/publicationsshow_8428.html |
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