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Polyimide/silica hybrids

Preparation of High-Performance Polyimide-Silica Hybrid Materials... [Pg.18]

An aqueous solution of salt monomer 9PME was mixed with tetramethoxysi-lane, yielding a gel, which was then vacuum-dried forming a precursor powder composed of silica gel and the salt monomer. This was subjected to high-pressure polycondensation under 235 MPa at 230 °C for 5 h, producing polyimide-silica hybrid molding. By varying the ratio of tetramethoxysilane to the salt... [Pg.18]

V. A. Bershtein, L. M. Egorova, P. N. Yakushev, P. Pissis, P. Sysel, and L. Brozova, Molecular dynamics in nanostructured polyimide-silica hybrid materials and their thermal stability, J. Polym. Sci. B 40, 1056-1069 (2002). [Pg.240]

Relevant systems are mbber-toughened epoxy resins, high-impact acrylic (PMMA particles in mbber matrix, obtained by radical polymerization of 80/20 MMA/EVAc mixture), polyimide/silica hybrid materials (obtained using the sol-gel method), and a very high strength ( 60 MPa) mbbers (obtained by peroxide cure of a hydrogenated nitrile rubber/ zinc dimethacrylate system) [Inoue, 1995]. [Pg.564]

Mus Musto, P., Ragosta, G., Scarinzi, G., Mascia, L. Structure-properties correlation in polyimide/ silica hybrids. High Perform. Polym. 18 (2006) 799-816. [Pg.549]

Physical and Gas Transport Properties of Hyperbranched Polyimide-Silica Hybrid Membranes... [Pg.143]

Figure 8.1 ideal CO2/CH4 selectivity (a(C02/CH4)) of 6FDA-based polyimide-silica hybrid membranes plotted against CO2 permeability coefficient attached number represents silica content (wt%) in the membrane... [Pg.144]

Scheme 8.1 Preparation of hyperbranched polyimide-silica hybrid membrane... Scheme 8.1 Preparation of hyperbranched polyimide-silica hybrid membrane...
Infrared spectroscopy (IR) is also a very useful technique for characterizing stmcture. IR spectroscopy can be used for identification purposes as well as for monitoring the progress of a chemical reaction. Comparisons of the positions of absorptions in the IR spectrum of a sample with the characteristic absorption regions, leads to identification of the bonds and functional groups present in the sample. For example, the chemical stmctures of polyimide-silica hybrid films were confirmed by IR spectroscopy by the appearance of two absorptions at 1,100 and 830 cm indicating the formation of the Si-O bonds. [Pg.555]

The SEM micrographs in Figure 24.14 [25] show the morphology of typical polyimide/silica hybrids based, respectively, on Skybond 703 and Pyre ML-RK692. [Pg.483]

Figure 24.14 SEM micrographs of fractured surfaces of polyimide/silica hybrids (25% w/w Si02) (a) systems based on low MW polyamic acid (Skybond 703) and (b) systems based on high MW polyamic acid (Pyre ML). Figure 24.14 SEM micrographs of fractured surfaces of polyimide/silica hybrids (25% w/w Si02) (a) systems based on low MW polyamic acid (Skybond 703) and (b) systems based on high MW polyamic acid (Pyre ML).
Figure 24.16 Effect of replacing a commercial sizing with a polyimide-silica hybrid coating on the interlaminar shear rigidity as a function of temperature of glass flber/epoxy composites. Figure 24.16 Effect of replacing a commercial sizing with a polyimide-silica hybrid coating on the interlaminar shear rigidity as a function of temperature of glass flber/epoxy composites.
The precursor solution for these polyimide-silica hybrids was prepared in the same way as for coating formulations. The only difference was the type and molecular weight of the polyamic add (see Figure 24.4) and the amounts of alkoxysilane used for the formation of silica domains. Films were produced using the same curing... [Pg.486]

Masda. L. and Kionl, A. (1994) CompatibUity of polyimide-silica hybrids induced by alkoxysilane coupling agents. /. Cryst. Solids, 175. 169. [Pg.489]

Optimisation of morphology of polyimide-silica hybrids in the production of matrices for carbon fibre. High Perform. Polym., 13, 1. [Pg.489]

Tang JC, Yang HC, Chen SY, Chen-Yang YW (2007) Preparation and properties of polyimide/silica hybrid nanocomposites. Polymer Compos 28(5) 575—581... [Pg.169]

Chang C-C, Chen W-C (2002) Synthesis and optical properties of polyimide-silica hybrid thin films. Chem Mater 14(10) 4242-4248... [Pg.173]

Wang S, Ahmad Z, Mark JE (1994) Polyimide-silica hybrid materials modified by incorporation of an organically substituted alkoxysilane. Chem Mater 6(7) 943-946... [Pg.173]

Chen Y, Iroh JO (1999) Synthesis and characterization of polyimide silica hybrid composites. Chem Mater 11(5) 1218-1222... [Pg.173]

Shang XY, Zhu ZK, Yin J, Ma XD (2002) Compatibility of soluble polyimide/silica hybrids induced by a coupling agent. Chem Malm 14(l) 71-77... [Pg.173]

Mascia L, Kioul A (1995) Influence of siloxane compositirai and morphology on properties of polyimide-silica hybrids. Polymer 36(19) 3649-3659... [Pg.173]

Hsiue G-H, Chen J-K, Liu Y-L (2000) Synthesis and characterization of nanocomposite of polyimide-silica hybrid from nonaqueous sol-gel process. J Appl Polym Sci 76(11) 1609-1618... [Pg.173]

Suzuki T, Yamada Y (2006) Characterization of 6FDA-based hyperbranched and linear polyimide-silica hybrid membranes by gas permeation and 129Xe NMR measurements. [Pg.183]

Suzuki T, Yamada Y (2005) Physical and gas transport properties of novel hyperbranched polyimide - silica hybrid membranes. Polym Bull 53(2) 139-146... [Pg.184]

Mnsto Pellegrino, Ahhate Mario, Lavorgna Marino, Ragosta Ginseppe, and Scarinzi Gennaro. Microstrnctnral featnres, diffnsion and molecnlar relaxations in polyimide/ silica hybrids. Polymer. 47 no. 17 (2006) 6172-6186. [Pg.190]

Suzuki T, Yamada Y (2007) Effect of End Group Modification on Gas Transport Properties of 6FDA-TAPOB Hyperbranched Polyimide-Silica Hybrid Membranes High performance polymers 19 553-564. [Pg.61]

Srisuwan S, Thongyai S, Praserthdam P (2010) Synthesis and characterizatirai of low-dielectric photosensitive polyimide/silica hybrid materials. J Appl Polym Sci 117 2422-2427 Tagam N, Okada M, Hira N, Ohki Y, Tanaka T, finai T, Harada M, Ochi M (2008) Dielectric properties of epoxy/clay nanocomposites—effects of curing agent and clay dispersion method. IEEE Trans Diel Electr Insul 15 24—32... [Pg.262]

Kakimoto M., Morikawa A., lyoku Y., Imai Y. Preparation of polyimide-silica hybrid films. Mater. Res. Soc. Symp. Proc. 1991 207 69-79... [Pg.1210]

Zhong S.-H., Li C.-F., Xiao X.-F. Preparation and characterization of polyimide-silica hybrid membranes on kieselguhr-mullite supports. J. Membr. Sci. 2002 199 53-58... [Pg.1366]

Atsushi Morikawa studied organic materials science at the Tokyo Institute of Technology. In 1992 he obtained his doctor s degree on siloxane dendrimers and polyimide-silica hybrid materials by sol-gel method. After a two-year spell as a research engineer at Asahi Chemical Company, he transferred to the Faculty of Engineering at Ibaraki University to continue his research on polyfether ketone) dendrimers and polyimides. [Pg.451]

See other pages where Polyimide/silica hybrids is mentioned: [Pg.981]    [Pg.592]    [Pg.981]    [Pg.463]    [Pg.144]    [Pg.156]    [Pg.553]    [Pg.555]    [Pg.483]    [Pg.486]    [Pg.266]    [Pg.49]    [Pg.406]    [Pg.221]    [Pg.346]   
See also in sourсe #XX -- [ Pg.483 , Pg.484 , Pg.485 ]



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