Hydrodeoxygenation of Diphenyl Ether over an In Situ NiMoS Catalyst

2021 ◽  
Author(s):  
T. S. Kuchinskaya ◽  
L. G. Mamian ◽  
M. I. Kniazeva
Keyword(s):  
Diphenyl Ether

Novel Modified Aromatic Polyamides and Polyimides Derived from a Diphenyl Ether-Based Diamine Containing Laterally-Attached Phenoxy Phenylene Groups

2010 ◽  
Vol 93-94 ◽  
pp. 255-258
Author(s):  
Hossein Behniafar ◽  
Saeed Khosravi-Borna ◽  
Parvaneh Boland
Keyword(s):  
Diphenyl Ether ◽  
Wide Angle ◽  
Triphenyl Phosphate ◽  
Polar Solvents ◽  
Polyamic Acid ◽  
X Ray ◽  
Aromatic Polyamides ◽  
Flexible Films ◽  
Film Characteristics

In this research a new structurally-modified monomer, 2,2'-bis[(p-phenoxy phenyl)]-4,4'-diaminodiphenyl ether (PPAPE) was synthesized by a three-step manner starting from 4,4'-dinitrodiphenyl ether. Novel classes of wholly aromatic polyamides and polyimides were prepared from PPAPE through the conventional polycondensation reactions including triphenyl phosphate-activated phosphorylation method for the preparation of the polyamides and cyclodehydration of in situ-formed polyamic acid precursors for the preparation of the polyimides. n and w values were determined by GPC measurements. Crystallinity, organosolubility, and qualitative film characteristics of the resulting aromatic polyamides and polyimides were investigated. A low crystallinity extent was only observed using their wide-angle X-ray diffractograms. All polymers had excellent organosolubility in common polar solvents such as DMAc, DMF, DMSO, and NMP. The resulting well-designed polymers could also be cast into transparent and flexible films.

In Situ Cryocrystallization of Diphenyl Ether:  C−H···π Mediated Polymorphic Forms

2004 ◽  
Vol 126 (39) ◽  
pp. 12274-12275 ◽  
Author(s):  
Angshuman R. Choudhury ◽  
Kabirul Islam ◽  
Michael T. Kirchner ◽  
Goverdhan Mehta ◽  
Tayur N. Guru Row
Keyword(s):  
Diphenyl Ether ◽  
Polymorphic Forms

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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