Matrimide

Reportedly, OjoCdiaHylbispheaol A is an attractive comonomer for bismaleimides because the corresponding copolymer is tough and temperature resistant (41). Toughness, however, is a function of the BMI—diaHylbisphenol A ratio employed. In one study optimized toughness properties were achieved when BMI and diaHylbisphenol were employed at a close to 2 1 molar ratio (42). In Table 9, the mechanical properties of BMI—bis(3-allyl-4-hydroxyphenyl)-7 -diisopropylbenzene resias are provided, showiag optimized properties for the 60/40 BMI—diaHylbisphenol composition. The 0,(9 diaHylbisphenol A is commercially available under the trademark Matrimide 5292. Another bisaHylphenyl compound is available from SheH Chemical Company/Technochemie under the trademark COMPIMIDE 121. 

SSZ-13 Sheath Ultem Core Ultem and Matrimid Silane coupling Dual layer hollow fiber Gas separations (e.g.. O2/N2) [75]... 

Specialty polymers Aerospace composites Primaset BADCY, PT-resins Matrimid Kapton Avimid 2,2-Bis(4-cyanatophenyl) propane and oligomers, Novolac cyanates Nonmelting polyimides Lonza, Switzerland Ffuntsman, USA DuPont, USA Mitsui, Japan... 

COMPIMIDE 796-COMPIMIDE 123. b Resisttherm PH-10 polyhydantoin. c Resistofol N polyhydantoin. d Matrimide 5218 polyimide. 

The first, and currently only, successful solvent-permeable hyperfiltration membrane is the Starmem series of solvent-resistant membranes developed by W.R. Grace [40]. These are asymmetric polyimide phase-inversion membranes prepared from Matrimid (Ciba-Geigy) and related materials. The Matrimid polyimide structure is extremely rigid with a Tg of 305 °C and the polymer remains glassy and unswollen even in aggressive solvents. These membranes found their first large-scale commercial use in Mobil Oil s processes to separate lube oil from methyl ethyl ketone-toluene solvent mixtures [41-43], Scarpello et al. [44] have also achieved rejections of >99 % when using these membranes to separate dissolved phase transfer catalysts (MW 600) from tetrahydrofuran and ethyl acetate solutions. 

MATRIMID CIBA-Geigy Indane containing polyimide... 

The blending of a BMI with a powder of a thermoplastic polymer without solvent offers a great advantage for the processing. Some results have been published based on a non-disclosed formula BMI blended with the CIBA GEIGY Matrimide 5218. The addition of 20% of powder did not require a modification of the cure cycle and an improvement in the mechanical properties (inhibition of crack propagation) was observed [115]. 

A similar concept based on a mixture of BMI-MDA (Matrimide 5292 A) and bis-alkenylphenol (Matrimide 5292 B) with a flexible polyimide has been patented as a heat-resistant adhesive [117]. 

Kharitonov et al. [59] have shown that direct fluorination of the polyimide Matrimid is possible, hence the resulting membrane should have a nice potential for use in harsh environment. Perfluorinated materials were also studied by Hagg [60] for chlorine gas purification, and were shown to be exceptionally stable in these harsh environments. The selectivity was however too low. In a later publication on chlorine purification [31] it was suggested to use perfluorinated monomers as surface-modifying compounds for pore tailoring of glass membranes for chlorine gas separation. 

Kharitonov AP, Moskvin YL, Syrtsova DA, Starov VM, and Teplyakov VV. Direct fluorination of the polyimide Matrimid 5218 The formation Kinetics and Physicochemical properties of the Fluorinated layers. J. Appl. Pol. Sci. 2004 92 6-17. 

Analytical pyrolysis has been successfully used for monitoring the curing process of certain polyimide polymers. For example, the polyimide Matrimid 5292 is obtained from two components in a reaction as shown below ... 

The progress of polymerization of Matrimid 5292 can be monitored by Py-GC/MS [19]. The levels of methylphenol, 4-succinimido-4 -aminodiphenylmethane, and 2-(2-propenyl)-4-methylphenol are increased in the pyrolysate as the degree of curing increases. At the same time, the level of 3,3 -diallyl bisphenol A decreases with increasing cure. 

Jiang, L.Y. Chung, T.S. Li, D.F. Cao, C. Kulprathipanja, A. Fabrication of matrimid/ polyethersulfone dual layer hollow fiber... 

A further point of interest is the effect, if any, of the addition and elimination of amine on the molecular weight of the polyimide. An interesting experiment was devised to investigate this possibility. Samples of Matrimid 5218 were reacted in separate experiments with... 

Figure 4. Thermogravimetric analysis a) solution of amine-modified Matrimid 5218 b) solution of control Matrimid 5218 (see text).

Figure 6. IR spectra a) electrocoated Matrimid 5218 after curing, b) control Matrimid 5218.

Matrimid . [Qba-Geigy/Plastics] Thermoplastic polyimides for structural composites and adhesives. 

Additional polymer blends comprising PAEK s offering property combinations of potential utility include PSF [Robeson and Harris, 1986 Harris and Robeson, 1989] structurally different poly(aryl ketones) [Harris and Robeson, 1986], PAr [Robeson and Harris, 1992], poly(amide-imide) PAI [Harris and Gavula, 1992], PPS [Robeson, 1987], and other PI [Harris et al., 1992]. Mixtures of structurally different PAEK s were noted to be isomorphic within specific limits of ether/ketone ratios [Harris and Robeson, 1987]. Blends of polybenzimidazole, PBI and several commercial PI (Ultem 1000 and Matrimid 5218) have been studied in depth at the University of Massachusetts and found to be miscible. FTIR studies [Guerra et al., 1988 Kim et al., 1993], NMR studies [Grobelny et al., 1990], thermal, dielectric, and mechanical... 

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