We study the low-frequency, long-wavelength dynamics of soft and semi-soft nematic elastomers using two different but related dynamic theories. Our first formulation describes the pure hydrodynamic behavior of nematic elastomers in which the nematic director has relaxed to its equilibrium value in the presence of strain. We find that the sound-modes structure for soft elastomers is identical to...

Polymer latexes are being increasingly used in the construction industry as modifiers, especially in hydraulic cement concrete and mortar. Figure 1 presents polymeric latexes used as cement modifiers. Among the different presentations of polymeric latexes, elastomers are the most widely used (Ohama, 1995). In practice, there are two basic elastomers applicable to cement mixes and these are natu...

Soft and pliable conductive polymer composites hold promise for application as bioelectronic interfaces such as for electroencephalography (EEG). In clinical, laboratory, and real-world EEG there is a desire for dry, soft, and comfortable interfaces to the scalp that are capable of relaying the μV-level scalp potentials to signal processing electronics. A key challenge is that most material app...

Abstract Soft and flexible strain piezoresistive sensors are gaining interest in wearable robotic applications, but resistance relaxation limits the widespread use of sensors. As soft, flexible, stretchable sensors, they can easily be retrofitted into any existing hand. To understand three different elastomers were used to fabricate soft The experimental results showed that sensor has good line...

The ability to track individual animals is crucial in many field studies and often requires applying marks to captured individuals. Toe clipping has historically been a standard marking method for wild amphibian populations, but more recent marking methods include visual implant elastomer and photo identification. Unfortunately, few studies have investigated the influence and effectiveness of m...

Abstract. Iodine-doped Poly (Ethyl Methacrylate) composites have been prepared using casting method. Global TSDC of the composite samples has investigated TSDC-TS technique. It is found that, global spectra pure PEMA are characterized by two relaxations. The first relaxation which observed as a shoulder in temperature range 324-333 K attributed to motion side group and named -relaxation. Where...

OBJECTIVE To investigate the effect of fluoridated elastomers on the quantity of disclosed dental plaque surrounding an orthodontic bracket in vivo. DESIGN A randomized, prospective, longitudinal clinical trial, employing a split mouth, crossover design. SETTING The Orthodontic Departments of Liverpool and Sheffield Dental Hospitals. SUBJECTS AND METHODS The subjects were 30 individuals a...

DOI: 10.1002/admt.201700284 system.[11] Researchers have developed highly stretchable strain sensors made of compliant elastomers and various conductive materials, such as silver nanowire,[12] carbon nanotube (CNT),[13–18] carbon grease,[19] graphene,[20] graphite,[21] laser-carbonized polyimide,[22] conductive acrylic elastomer,[10] liquid metal,[23,24] ionic liquid,[25–27] and conductive fabr...