A New Concept in Combine Separation Analysis

Wang, G.; Zoerb, G. C.; Bigsby, F. W.

doi:10.13031/2013.30495

Cited by 4 publications

(5 citation statements)

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“…Nelson, 1 Hiroaki, 2 and Wang and coworkers 3,4 synthesized low-dielectric DCPD-containing epoxy resins derived from the novolac of phenol and DCPD in the presence of a Lewis acid and then converted the resulting novolacs into epoxy resins. In our previous study, 5 a 2,6-dimethyl phenol dicyclopentadiene novolac was synthesized from DCPD and 2,6-dimethyl phenol and then converted into the corresponding epoxy resin by a reaction with epichlorohydrin.…”

Section: Introductionmentioning

confidence: 99%

Dielectric behavior and properties of a cyanate ester containing dicyclopentadiene. I

Hwang

Wang

2005

J of Applied Polymer Sci

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2,6-Dimethyl phenol dicyclopentadiene dicyanate ester (DCPDCY) was synthesized through the reaction of 2,6-dimethyl phenol dicyclopentadiene novolac and cyanogen bromide. The proposed structure was confirmed by Fourier transform infrared, mass spectrometry, NMR spectrometry, and elemental analysis. DCPDCY was then cured by itself or cured with bisphenol A dicyanate ester (BADCY) to form triazine structures. The thermal properties of the cured DCPDCY resins were studied with differential scanning calorimetry, dynamic mechanical analysis (DMA), dielectric analysis, and thermogravimetric analysis; these data were compared with those of BADCY. The cured DCP-DCY resins exhibited a lower dielectric constant (2.58 at 1 MHz), a lower dissipation factor (20.2 mU at 1 MHz), less thermal stability (the 5% degradation temperature and char yield were 430°C and 32.1%, respectively), a lower glasstransition temperature (266°C by thermomechanical analysis and 271°C by DMA), a lower coefficient of thermal expansion (22.5 ppm before the glass-transition temperature and 124.9 ppm after the glass-transition temperature), and less moisture absorption (0.88% at 48 h) than BADCY, but they showed higher moduli (6.28 GPa at 150°C and 5.35 GPa at 150°C) than the bisphenol A system. The properties of the cured cocyanate esters (DCPDCY and BADCY) lay between those of cured BADCY and DCPDCY, except for the moduli. The moduli of some cocyanate esters were even higher than those of cured BADCY and DCPDCY. A positive deviation from the Fox equation was observed for cocyanate esters.

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Section: Introductionmentioning

confidence: 99%

Dielectric behavior and properties of a cyanate ester containing dicyclopentadiene. I

Hwang

Wang

2005

J of Applied Polymer Sci

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“…Thus, The ability of the polymer to conduct heat will be high. The more filler there is, the more heat conduction paths there are, which improves the material's thermal conductive performance [25] . Porous structures were seen within PMMA in the control group's SEM images (figure 6).…”

Section: Discussion: Thermal Conductivitymentioning

confidence: 99%

The Role of Boron Nitride Particles on Thermal Conductivity, Transverse Strength and Surface Hardness of Heat Cure Acrylic Resin

Ali M. Hussein,

J. Al-Judy

2024

TJDS

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Objectives: The objective of this research was to investigate how boron nitride powder addition in percentages of 1% weight and 1.5% weight, affected the thermal conductivity, transverse strength, and surface hardness of heat cured acrylic resin denture base material. Methods: Ninety specimens were made from heat-cured acrylic resin and then divided into three groups based on the tests: a control group, a reinforced poly methyl methacrylate group with 1% weight boron nitride particles, and a reinforced poly methyl methacrylate group with 1.5% weight boron nitride particles. They investigated into the thermal conductivity, transverse strength, and surface hardness tests. Results: This research showed that 1% and 1.5% weight boron nitride particles significantly increased thermal conductivity and surface hardness in comparison to the controlled group. There was a highly significant increase in transverse strength compared to the control group; at the concentration of 1% weight boron nitride particles. Conclusion: Boron nitride particles enhance the thermal conductivity, transverse strength, and surface hardness when added to heat cure acrylic resin denture base material.

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“…Thus, when the reaction of C60 with N-methylor N-ethylglycine in the presence of paraformadehyde or various substituted benzaldehydes was conducted under the HSVM conditions (1 h), it gave a moderate yield (20-30%) of fulleropyrrolidine 18 together with about 50% recovery of C60 (Scheme 8). 32 The optimum molar ratio of the reagents, C60, glycine, and aldehyde, was found to be 1:1:1 to 1:2:2.…”

Section: Solid-state Cycloaddition Reactions Of C60mentioning

confidence: 92%

Synthesis of Fullerene Derivatives with Novel Structures-Liquid-Phase versus Solid-State Reactions-

Komatsu

Murata

2004

J. Syn. Org. Chem., Jpn.

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: Reactions of C60 with various carbon nucleophiles, particularly those with substituted acetylide and fluorenide ions in the liquid phase, give various C60 derivatives. While the reaction with cyanide salts only affords the cyanated C60 in liquid phase, the solid-state mechanochemical reaction selectively gives the dumbbell-shaped dimer. As typically shown by this example, the solid-state reaction was found to be quite advantageous for the formation of various types of fullerene dimers. The reaction of C60 with phthalazine also results in formation of entirely different products depending on the reaction phase. While the solid-state reaction gives a fullerene dimer incorporated in a bicyclic framework, the liquid-phase thermal reaction affords a derivative of an open-cage fullerene. Utilizing this reaction, an attempt has been made for organic synthesis of endohedral fullerene encapsulating molecular hydrogen through a series of procedures, i.e., opening a hole on the fullerene cage, insertion of molecular hydrogen, and reduction of the size of the opening.

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A New Concept in Combine Separation Analysis

Cited by 4 publications

References 0 publications

Dielectric behavior and properties of a cyanate ester containing dicyclopentadiene. I

Dielectric behavior and properties of a cyanate ester containing dicyclopentadiene. I

The Role of Boron Nitride Particles on Thermal Conductivity, Transverse Strength and Surface Hardness of Heat Cure Acrylic Resin

Synthesis of Fullerene Derivatives with Novel Structures-Liquid-Phase versus Solid-State Reactions-

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