Results 71 to 80 of about 11,450 (195)
Sonogashira/N-acyliminium ion aromatic π-cyclisation processes: access to tetra- and pentacyclic lactams [PDF]
, 2008 Application of the Sonogashira reaction of N-alkynylimides with 2-iodophenol or 2-iodo-N-tosylaniline affords 2-(N-alkylimino)-benzofurans and indoles in good yield.
Grigg, R., Sridharan, V., Sykes, D.A.
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Addition polyimide end cap study [PDF]
The characterization of addition polyimides with various end caps for adhesive applications at 120-250 C environments is discussed. Oligometric polyimides were prepared from 3,3',4,4'-benzophenone tetracarboxylic dianhydride and 3,3'-methylenedianiline ...
St.clair, T. L.
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Molecular Devices. Chiral, Bichromophoric Silicones [PDF]
, 2008 The interaction of chromophores is proposed as a basis for the construction of devices with high complexity.
Ganachaud, Francois, Langhals, Heinz
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Flexibilized copolyimide adhesives [PDF]
Two copolyimides, LARC-STPI and STPI-LARC-2, with flexible backbones were processed and characterized as adhesives. The processability and adhesive properties were compared to those of a commercially available form of LARC-TPI.
Progar, Donald J., St.clair, Terry L.
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Tailor making high performance graphite fiber reinforced PMR polyimides [PDF]
Studies have demonstrated versatility of PMR approach for tailor making polyimide matrix resins with side range of flow characteristics. By simply adjusting molar ratio of reactants in monomer mixture, resins having flow values of as much as 20% can be ...
Serafini, T. T., Vannucci, R. D.
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Process for preparing phthalocyanine polymer from imide containing bisphthalonitrile [PDF]
, 1987 Imide-linked bisphthalonitrile compounds are prepared by combining a dicyano aromatic diamine and an organic dianhydride to produce an amic acid linked bisphthalonitrile compound.
Achar, Bappalige N. +2 more
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Modification of PVC and PVC Copolymer by Substitution Imide Groups
Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017 In this work the poly vinyl imides were prepared as thermal l y stable polymers by modified PVC and PVC copolymers \'lith different cyclic imides such as naphtha imide, phtbal imide, male imide and succin imide as a pendant groups.
F.M. A. AL-Salami, A. H. AL-Duri
doaj
High-temperature polymer matrix composites [PDF]
Polymers research at the NASA Lewis Research Center has produced high-temperature, easily processable resin systems, such as PMR-15. In addition, the Polymers Branch has investigated ways to improve the mechanical properties of polymers and the ...
Meador, Michael A.
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High performance composites research at NASA-Langley [PDF]
Barriers to the more extensive use of advanced composites in heavily loaded structures on commercial transports are discussed from a materials viewpoint. NASA-Langley matrix development activities designed to overcome these barriers are presented.
Baucom, Robert M. +2 more
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Poly(carbonate-imide) polymer [PDF]
, 1987 A novel series of polymers and copolymers based on a polyimide backbone with the incorporation of carbonate moieties along the backbone. The process for preparing these polymers and copolymers is also disclosed as is a novel series of dinitrodiphenyl ...
Maudgal, Shubha +2 more
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