A5046307306- Polymer crystallization and properties
- Synthesis and properties of polymers
- Polymer Nanocomposites and Properties
- Dendrimers and Hyperbranched Polymers
- Muon and positron interactions and applications
- Flame retardant materials and properties
- Silicone and Siloxane Chemistry
- biodegradable polymer synthesis and properties
- Membrane Separation and Gas Transport
- Advanced Sensor and Energy Harvesting Materials
- Photopolymerization techniques and applications
- Fuel Cells and Related Materials
- Liquid Crystal Research Advancements
- Dental Trauma and Treatments
- Polymer composites and self-healing
- Conducting polymers and applications
- Tribology and Wear Analysis
- Surface Modification and Superhydrophobicity
- Thermal and Kinetic Analysis
- Rheology and Fluid Dynamics Studies
- Graphene research and applications
- Thermal properties of materials
- Material Properties and Applications
- Carbon Nanotubes in Composites
- Dielectric materials and actuators
University of Southern Mississippi
2015-2024
Cornell University
2020-2021
Presbyterian Hospital
2021
National Research Council
2020
National University of Singapore
2020
University of Massachusetts Amherst
2020
Chinese Academy of Sciences
2020
Russian University of Transport
2018-2020
Dow Chemical (United States)
2008-2020
Caerus Molecular Diagnostics (United States)
2020
An efficient, environmentally friendly, and water-applied flame retardant surface nanocoating based on polydopamine (PDA) was developed for foamed materials such as polyurethane (PU). The PDA nanocoating, deposited by simple dip-coating in an aqueous dopamine solution, consists of a planar sublayer secondary granular layer structure that evolve together, eventually turning into dense, uniform, conformal all foam surfaces. In contrast to flexible PU foams are known be highly flammable without...
Abstract A highly effective flame retardant (FR) nanocoating was developed by conducting oxidative polymerization of dopamine monomer within an aqueous liquid crystalline (LC) graphene oxide (GO) scaffold coating. Due to its high water content, the LC coating approach facilitated fast transport and precursors into polydopamine (PDA) swollen interlayer galleries. Uniform periodically stacked (14.5 Å d‐spacing) PDA/GO nanocoatings could be universally applied on different surfaces, including...
Abstract Mechanical failure of π‐conjugated polymer thin films is unavoidable under cyclic loading conditions, due to intrinsic defects and poor resistance crack propagation. Here, the first tear‐resistant room‐temperature self‐healable semiconducting composite presented, consisting conjugated polymers butyl rubber elastomers. This new displays both a record‐low elastic modulus (<1 MPa) ultrahigh deformability with fracture strain above 800%. More importantly, behavior not sensitive...
Composites that incorporate a conductive filler into an ethylene–octene (EO) elastomer matrix were evaluated for DC electrical and mechanical properties. Comparing three types of fillers (carbon fiber, low structure carbon black, high black), it was found the composite with black exhibited combination properties not generally achievable this type in elastomeric matrix. A decrease resistivity at strains is unusual has only been reported previously few instances. Reversibility upon cyclic...
Abstract Three polystyrene (PS)/clay hybrid systems have been prepared via in situ polymerization of styrene the presence unmodified sodium montmorillonite (Na‐MMT) clay, MMT modified with zwitterionic cationic surfactant octadecyldimethyl betaine (C18DMB) and polymerizable vinylbenzyldimethyldodecylammonium chloride (VDAC). X‐ray diffraction TEM were used to probe mineral layer organization expose morphology these systems. The PS/Na‐MMT composite was found exhibit a conventional structure...
Abstract Numerous examples in the literature illustrate how coextrusion of film with three or more polymeric layers is economically used to achieve a desirable mix end‐use characteristics. More recently, layer‐multiplying devices permit two polymers widely dissimilar solid‐state properties be combined into unique microlayer and nanolayer structures hundreds thousands alternating layers. If are thin enough, key constituents can combine synergistically. The structure also an effective research...
Superamphiphobic surfaces, exhibiting high contact angles and low angle hysteresis to both water surface tension liquids, have attracted a great deal attention in recent years because of the potential these materials practical applications such as liquid-resistant textiles, self-cleaning antifouling/anticorrosion coatings. In this work, we present simple strategy for fabricating superamphiphobic coatings based on photopolymerization hybrid thiol-ene resins. Spray-deposition UV resins...
Converting biomass-based feedstocks into polymers not only reduces our reliance on fossil fuels, but also furnishes multiple opportunities to design biorenewable with targeted properties and functionalities. Here we report a series of high glass transition temperature (Tg up 184 °C) polyesters derived from sugar-based furan derivatives as well joint experimental theoretical study substituent effects their thermal properties. Surprisingly, find that moderate steric hindrance exhibit the...
Mussel-inspired approach was attempted to non-covalently functionalize the surfaces of boron nitride (BN) with self-polymerized dopamine coatings in order reduce interfacial thermal barrier and enhance conductivity BN-containing composites. Compared polypropylene (PP) composites filled pristine BN at same filler content, much higher for those both functionalized (f-BN) maleic anhydride grafted PP (PP-g-ma) due improved dispersion better filler-matrix compatibility, which facilitated...
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication the EditorNEXTPhysical and Mechanical Properties of Photopolymerized Thiol−Ene/AcrylatesAskim F. Senyurt, Huanyu Wei, Brian Phillips, Michael Cole, Sergei Nazarenko, Charles E. Hoyle, Scott G. Piland, Trenton GouldView Author Information School Polymers High Performance Materials Human Recreation, University Southern Mississippi, 118 College Drive, 10076, Hattiesburg, Mississippi 39406 Cite this: Macromolecules 2006, 39, 19,...
A new family of poly(ethylene glycol) (PEG) based membranes for CO2 separation was developed using thiol–ene photopolymerization. Compared to photopolymerized PEG-containing acrylate membranes, these offer improved mechanical properties and processing advantages. The starting material, a combination trithiol cross-linker PEG diene, gradually modified with dithiol while maintaining 1:1 thiol:ene stoichiometry. This approach made it possible decrease the network cross-link density, resulting...
A self-healable gas barrier nanocoating, which is fabricated by alternate deposition of polyethyleneimine (PEI) and polyacrylic acid (PAA) polyelectrolytes, demonstrated in this study. This multilayer film, with high elastic modulus, glass transition temperature, small free volume, has been shown to be a super oxygen barrier. An 8-bilayer PEI/PAA assembly (≈700 nm thick) exhibits an transmission rate (OTR) undetectable commercial instrumentation (<0.005 cc (m-2 d-1 atm-1 )). The property...
Abstract Polymer self‐assembly provides a robust and cost‐efficient nanomanufacturing platform for enabling broad range of applications, such as microelectronics, drug delivery, separation membranes. This review focuses on discussing the progress opportunities self‐assembled polymer in synthesis mesoporous carbons (MCs), which have aroused significant research interests over past decades. Specifically, we will discuss two most established approaches converting nanostructured polymers to MCs,...
Systematic divergences in the orthopositronium (o-Ps) annihilation lifetimes, τ3, and intensities, I3, are observed, when comparing melt-crystallized cold-crystallized poly(ethylene terephthalate) (PET) as a function of crystallinity. Following previous analysis corresponding deviations oxygen permeability, I3 τ3 traced to distinct characteristic values for probability o-Ps formation lifetime rigid amorphous phase (RAF) associated with crystalline lamellae mobile regions (MAF) which...
Abstract Thiol oligomers were copolymerized with a triallyl ether by photoinduced polymerization process. These oligomeric thiol‐ene systems comprise the same components as photopolymerized thiol‐ene‐acrylate ternary system, yet networks have much lower glass transition temperatures. An investigation into effect of thiol design on network formation was conducted analyzing reaction kinetics and thermal/mechanical properties networks. Real‐time FTIR analysis shows that total conversion is...
Large-scale industrial applications of barrier films and coatings that prevent permeation degradative gases moisture call for the development cost-efficient ecofriendly polymer nanocomposites. Herein, we report facile fabrication latex nanocomposites (LNCs) by incorporating surface-modified graphene oxide (mGO) at various loadings (0.025–1.2 wt %) into a styrene-acrylic using water as processing solvent. LNCs fabricated with mGO exhibited significant reductions (up to 67%) in vapor sorption,...