Tuning the Microphase Behavior of Carbon-Precursor Polymer Blends with Surfactant-Like Nanotubes: Toward Catalyst Support for Water Splitting

2021 ◽  
pp. 134027
Author(s):  
Seonmyeong Noh ◽  
Semin Kim ◽  
Thanh-Hai Le ◽  
Eunseo Heo ◽  
Saerona Kim ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Water Splitting ◽  
Catalyst Support ◽  
Carbon Precursor ◽  
Precursor Polymer

Polymer Blends made from Ionomer and Ionomer Precursor Polymer

1996 ◽  
Vol 461 ◽  
Author(s):  
M. A. Bellinger ◽  
X. Ma ◽  
L. Tsou ◽  
J. A. Sauer ◽  
M. Hara
Keyword(s):  
Methyl Methacrylate ◽  
Polymer Blends ◽  
Interfacial Adhesion ◽  
Composition Range ◽  
Refractive Indices ◽  
Positive Deviation ◽  
Fine Dispersion ◽  
Matrix Polymer ◽  
Precursor Polymer ◽  
The Matrix

ABSTRACTRigid-rigid blends made of an ionomer and an ionomer precursor polymer, based on either polystyrene (PS) or poly(methyl methacrylate)(PMMA), were studied. A positive deviation from the rule of mixtures in both strength and toughness was observed over the entire composition range; and an especially significant enhancement was observed at low ionomer composition (e.g., 10 wt.%). This is attributed to a fine dispersion of the rigid ionomer phase in the matrix polymer together with good interfacial adhesion between the phases. The adhesion arises from entanglements due to athermal interactions between the same monomeric units of both the ionomer and the ionomer precursor. In addition, all the blend samples are found to be transparent due to similar refractive indices of the two components.

Dicobalt Nickel Oxides With a Sugar-Based Carbon Precursor for Water Splitting Applications

2021 ◽  
Vol MA2021-02 (58) ◽  
pp. 1723-1723
Author(s):  
Wang Lin ◽  
Kelsey Thompson ◽  
Ram K Gupta
Keyword(s):  
Water Splitting ◽  
Carbon Precursor ◽  
Nickel Oxides

scholarly journals Formation of Fe Nanoparticles by Ion Implantation Technique for Catalytic Graphitization of a Phenolic Resin

2020 ◽  
Vol 4 (1) ◽  
pp. 11 ◽  
Author(s):  
Akira Idesaki ◽  
Shunya Yamamoto ◽  
Masaki Sugimoto ◽  
Tetsuya Yamaki ◽  
Yasunari Maekawa
Keyword(s):  
Ion Implantation ◽  
Phenolic Resin ◽  
Implantation Technique ◽  
Carbon Precursor ◽  
Nitrogen Gas ◽  
Catalytic Graphitization ◽  
Precursor Polymer ◽  
Heat Treated ◽  
Gas Atmosphere ◽  
Graphite Structure

Ion implantation technique was employed to introduce iron nanoparticles (Fe NPs) into a carbon precursor polymer with the aim of forming of a graphitic nanostructure through catalytic graphitization by the introduced Fe NPs. A phenolic resin was implanted by 100 keV Fe+ ions with ion fluence of 1 × 1014–1 × 1016 ions/cm2 at ambient temperature under vacuum, and subsequently heat-treated at 800 °C in a nitrogen gas atmosphere. It was found that the particle size of Fe NPs could be controlled in the range of 5–30 nm by the Fe+ ion fluence. Additionally, it was found that a nanosized turbostratic graphite structure with mean interlayer distance of 0.3531 nm, which is consisted of shell-like carbon layers and intricately distorted carbon layers, was formed around the Fe NPs. The ion implantation technique is one of the advantageous ways to introduce size-controlled fine metal NPs which are effective for the formation of graphitic nanostructure from a carbon precursor polymer.

Design and Syntheses of Poly(Norbornenyldecaborane) Precursors to Boron Carbide and Boron-Carbide/Silicon-Carbide Ceramics

2004 ◽  
Vol 848 ◽  
Author(s):  
Xiaolan Wei ◽  
Daniel T. Welna ◽  
Jared D. Bender ◽  
Larry G. Sneddon ◽  
Harry R. Allcock
Keyword(s):  
Silicon Carbide ◽  
Composite Materials ◽  
Boron Carbide ◽  
Polymer Blends ◽  
Ring Opening ◽  
Single Source ◽  
Metathesis Polymerization ◽  
Precursor Polymer ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

ABSTRACTPoly(norbornenyldecaborane) (PND) was synthesized via ruthenium catalyzed ring opening metathesis polymerization and was found to be a good single-source polymeric boron carbide precursor. Polymer blends of PND and allylhydridopolycarbosilane (AHPCS) were also found to be excellent precursors to boron-carbide/silicon-carbide composite materials.

Preparation and Characterization of Macroporous Foams Derived from a Phenolic Resin

2013 ◽  
Vol 773 ◽  
pp. 492-496
Author(s):  
Yu Yan Zhang ◽  
Hai Wang Wang ◽  
Yue Wen Du ◽  
Li Hui Song ◽  
Gao Gao Dong ◽  
...  
Keyword(s):  
Potential Application ◽  
Phenolic Resin ◽  
Catalyst Support ◽  
Carbon Precursor ◽  
Air Tightness

New macroporous carbons are prepared using phenolic resin foam as a carbon precursor. The synthesis scheme consisted of: (a) preparation of the phenolic resin foams, (b) carbonization of the phenolic resin foams. The synthesized phenolic resin foams were modificated by the hybrid SiO2nanomaterials for the first. The obtained macroporous carbons with better air tightness have potential application in catalyst support. Moreover, the shape of the macroporous carbons could be controlled by simply adjusting the phenolic resin foams.

scholarly journals Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: toward Design of Advanced Electrocatalyst for Full Water Splitting

2018 ◽  
Vol 10 (37) ◽  
pp. 31300-31311 ◽  
Author(s):  
Fatemeh Davodi ◽  
Elisabeth Mühlhausen ◽  
Mohammad Tavakkoli ◽  
Jani Sainio ◽  
Hua Jiang ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Splitting ◽  
Catalyst Support ◽  
Support Effect

Integration of Core-Edge Spectroscopy Methods for the Study of Polymers

1996 ◽  
Vol 54 ◽  
pp. 154-155
Author(s):  
E. G. Rightor
Keyword(s):  
Excited State ◽  
Polymer Blends ◽  
Gas Phase ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Electronic States ◽  
Core Electron ◽  
Bulk Solids ◽  
Development Application

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.

A quantitative image analysis method for the determination of cocontinuity in polymer blends

1993 ◽  
Vol 51 ◽  
pp. 894-895
Author(s):  
William A. Heeschen
Keyword(s):  
Image Analysis ◽  
Polymer Blends ◽  
Quantitative Measurement ◽  
Morphological Evolution ◽  
Phase Ratio ◽  
Irregular Shapes ◽  
Quantitative Image ◽  
Discrete Domains ◽  
A Domains

Two new morphological measurements based on digital image analysis, CoContinuity and CoContinuity Balance, have been developed and implemented for quantitative measurement of morphology in polymer blends. The morphology of polymer blends varies with phase ratio, composition and processing. A typical morphological evolution for increasing phase ratio of polymer A to polymer B starts with discrete domains of A in a matrix of B (A/B < 1), moves through a cocontinuous distribution of A and B (A/B ≈ 1) and finishes with discrete domains of B in a matrix of A (A/B > 1). For low phase ratios, A is often seen as solid convex particles embedded in the continuous B phase. As the ratio increases, A domains begin to evolve into irregular shapes, though still recognizable as separate domains. Further increase in the phase ratio leads to A domains which extend into and surround the B phase while the B phase simultaneously extends into and surrounds the A phase.

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