Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Polyimides copolymers

One of the major goals of this endeavor was to solubilize the normally intractable polyimides by the incorporation of siloxane segments, and, optionally, by solution imidization. Solubilities of a series of siloxane-modified polyimide copolymers were evaluated in a variety of solvents as indicated in Table I. Copolymer solubility was found to be a function of the siloxane oligomer concentration... [Pg.195]

Einsla, B. R., Hong, Y. T., Kim, Y. S., Wang, F., Gunduz, N. and McGrath, J. E. 2004. Sulfonated naphthalene dianhydride based polyimide copolymers for proton-exchange-membrane fuel cells. 1. Monomer and copolymer synthesis. Journal of Polymer Science Part A Polymer Chemistry 42 862-874. [Pg.180]

The next step concerned the synthesis of the polyester-polyimide copolymers. Triblock copolymers have been prepared by a step-growth copolymerization of stoichiometric amounts of an aromatic diamine and dianhydride (e.g., PMDA and 3FDA, as depicted in Scheme 41a) added with the single oo-amino polyesters as chain end-cappers. Graft copolymers can be prepared as well. In this case, the diamine end-functionalized oligomeric macromonomers are copolymerized with the polyimide condensation comonomers (Scheme 41b). [Pg.49]

Adhesion, Morphology, and Mechanical Characteristics of Polyimide Copolymers... [Pg.77]

Yilgor I, Yilgor E, Johnson BJ, Eberle J, Wilkes GL, McGrath JE (1983) Segmented polysiloxane-polyimide copolymers. Polymer Preprints 24(2) 78... [Pg.100]

Johnson BC (1984) PhD thesis, Materials Engineering Science. High-performance polyimide copolymers synthesis and characteristics. Virginia Polytechnic Institute and State University... [Pg.100]

Bolon DA, Hallgren JE, Eddy VJ, Codella PJ, Davis GC, Regh KA (1989) Patternable silicone polyimide copolymers. In Feger C, Khojasteh MM, McGrath JE (eds) Polyimides materials chemistry and characterization. Elsevier, Amsterdam, p 103... [Pg.100]

Kang C, Eiss NS, Jr. (1992) Fretting wear of polysiloxane-polyimide copolymer coatings as a function of varying humidity wear. Wear 158(1—2) 29... [Pg.106]

Both siloxane-polyimide copolymers and BPADA-derived copolymers exhibited excellent solubility in a variety of dipolar aprotic solvents, including tetrahydrofuran, n-methylpyrrolidone, and dimethyl sulfoxide, as well as chlorinated hydrocarbons such as o-dichlorobenzene and methylene chloride. The polymers and copolymers were typical thermoplastics exhibiting little elongation at failure. The tensile properties are summarized in Table II. [Pg.170]

Table VI. Properties of PADS/ODAN/4,4 -ODA Siloxane Polyimide Copolymers... Table VI. Properties of PADS/ODAN/4,4 -ODA Siloxane Polyimide Copolymers...
Metal-2,9,16,23-tetraaminophthalocyanines have been employed in the synthesis of polyimides and as curing agents for epoxy resins [133-135] Variables such as molar concentrations of the reagents, solvents and temperature were investigated to improve the conditions of the polycondensation. Solutions of the polyamide-acid copolymers can be used to fabricate films or fibers. The polyimide copolymers obtained in the second step of the reactions are insoluble. Excellent thermal stabilities up to 500 °C in air and 600 °C under vacuum were reported. [Pg.250]

Silicone-polyimide polymer. See Silicone-polyimide copolymer... [Pg.1340]

McGrath and coworkers [453] prepared a sulfonated naphtalene based polyimide copolymers using disulfonated diamine 3,3 -disulfonic acid -bis [4-(3-amino phenoxy)phenyl]sulfone (SA-DADPS), NTDA and one of two nonsulfonated diamines ODA or bis[4-(3-aminophenoxy)phenyl]sulfone (m-BAPS). Membranes prepared with ODA and mBAPS exhibit high proton... [Pg.186]

Einsla BR, Kim YS, Hickner MA, Hong YT, Hill ML, Pivovar BS, McGrath JE (2005) Sulphonated naphtalene elianhytlride based polyimide copolymers feu proton-exchange-membrane fuel cells, n. Membrane properties and fuel cell perfeumance. J Membr Sci 255 141-148... [Pg.227]

Ohkawa, Y. Sakata, Y Okumura, T. Shibuya, A. Kuroki, T. Oikawa, H. Poly (amic acid) copolymers, polyimide copolymers, and heat-resistant adhesives therefrom. Jpn. Kokai Tokkyo Koho JP 11217435, 1999 Chem. Abstr. 1999,131, 158564. [Pg.257]

H. Bai, W.W. Ho, Synthesis and characterization of new sulfonated polyimide copolymers and blends as proton-exchange membranes for fuel cells, J. Environ. Eng. Manage. 18 (5) (2008)289. [Pg.184]

Matynia, T. Gawdzik, B., and Staszczuk. P.. Characterization of carbon beads derived from porous polyimide copolymer, Adsorpt. Sci. Technol.. 15(6), 437-444 (1997). [Pg.1047]

Asano N, Miyatake K, Watanabe M (2006) Sulfonated block polyimide copolymers as a proton-conductive membrane. J Polym Sci, A Polym Chem 44 2744-2748... [Pg.212]

Eichstadt A E, Ward T C, Bagwell M D, Farr I V, Dunson D L, McGrath J E (2002) S3tnthesis and Characterizahon of Amorphous Partially Aliphatic Polyimide Copolymers Based on Bisphenol-A Dianhydride. Macromolecules 35 7561-7568. [Pg.123]

See other pages where Polyimides copolymers is mentioned: [Pg.61]    [Pg.61]    [Pg.62]    [Pg.71]    [Pg.83]    [Pg.112]    [Pg.156]    [Pg.63]    [Pg.90]    [Pg.90]    [Pg.91]    [Pg.98]    [Pg.607]    [Pg.18]    [Pg.165]    [Pg.281]    [Pg.143]    [Pg.16]    [Pg.20]    [Pg.142]    [Pg.281]    [Pg.84]    [Pg.591]    [Pg.48]    [Pg.52]    [Pg.222]   
See also in sourсe #XX -- [ Pg.271 ]

See also in sourсe #XX -- [ Pg.271 ]



SEARCH



Perfectly alternating segmented polyimide siloxane copolymers

Polyimide siloxane copolymers

Polyimide siloxane segmented copolymers

Polyimide-Nylon 6 copolymers

Polyimides block copolymer aerogels

Siloxane-modified polyimide copolymers

© 2024 chempedia.info