Ultem Poly

An alternative route to the formation of poly(imide)s is the nitro-displace-ment reaction to form the Ultem series of polymers, first exploited by White et al. [11] at General Electric. These, and similar materials, have application in composite materials and as specialty thermoplastics. Compared to the amic acid route described above, the nitro-displacement reaction is highly controlled, and materials of high chemical regularity produced, as demonstrated by White et al. [11] in their solution-state NMR study of Ultem poly(imide)s. 

MacKnight and coworkers found that several poly(imide)s, such as Ultem poly(ether imide) and XU218 poly(imide), formed miscible blends with poly (benzimidazole) (FBI) [58, 59]. The miscibility of these blends is believed to result from specific interactions between the benzimide ring of the poly(im-ide) and benzimidazole ring of FBI. In a later study, Grobelny et al. [60] reported the CFMAS spectra of several of these blends. Slight changes in the lineshape were observed in the intimate blends, and seen as evidence of the specific interactions between the polymers. In particular, the peak in the spectra, due to the imide carbonyl carbon, was seen to broaden towards... 

Ultem/Poly[4,4 -phenoxy (4-phenylene)sulfone] blend (50/50 by weight) 0.03 — 82.8... 

The best-known are General Electric Ultem poly (ether imides) these offer heat deflection temperatures of 207 to 221°C and continuous service temperatures of 170 to 180°C. Also popular are Amoco Torlon polyamide-imides, with heat deflection temperatures of 278 to 282°C. More specialized are Ciba-Geigy trimethyl phenyl indane polyimides, with heat deflection temperatures of 232 to 257°C, embrittlement times of >2000 hr at 200°C... 

In the case of the PBI blends discussed above, phase separation takes place a few degrees above the glass transition temperature for most blend compositions. This can be seen from the phase diagram for PBI/Ultem poly (ether imide) blends, as shown by Karasz and MacKnight. This suggests that the miscibility which is observed is a metastable phenomenon which is controlled by kinetic factors. The observed phase separation also indicates that it will be difficult to melt process the blends in the miscible state, due to the reasons already discussed. 

Ciba-Geigy) and poly(ether imide) (PEI, GE Ultem-1010)... 

In addition, ASA may be blended with other polymers that themselves exhibit high heat distortion temperatures. For example, blends of poly(ether imide) and ASA exhibit an improved heat distortion temperature, improved flexural properties and tensile properties in comparison to the ASA component alone and have lower impact strengths as well (35). The statement above has been exemplified using Ultem 1000 as a poly(ether imide) resin and Geloy 1020 as ASA component. 

As to the polymers, the most important of them - considering production figures - are very probably the poly(ether-imide)s (PEIs), marketed under the trade name Ultem. Neat PEI resins are amorphous, soluble polymers that show Tg values around 220 °C. They can be processed from the melt by conventional means, and offer a price-performance balance that enables them to compete successfully in the market of engineering thermoplastics. 

Estimate the Tg of the poly(imide) polymer ULTEM 1000 (produced by General Electric Co)... 

Substrates used included fiber-reinforced epoxy base polymer [FRP], nylon 66, polytetrafluoroethylene [Teflon], poly(ethylene terephthalate) [PET], phenolic resin, and thermoplastic polyimide [ULTEM, GE]. FRPs were the primary substrates used. Initially, they were cleaned with detergent in an ultrasonic bath followed by rinsing with deionized water and alcohol. For further cleaning, they were treated with oxygen plasma (1.33 seem, 60 W, 5 min) followed by a hydrogen plasma treatment (3 seem, 60 W, 5 min). 

Name Poly[(1,3-dihydro-1,3-dioxo-2H-i80indole-5,2-diyi)-1,3-phenylene(1,3-dihydro-1,3-dioxo-2H-isoindole-2,5-diyl)oxy-1,4-phenylene(1-methylethylidene)-1,4-phenyleneoxy]. Ultem 1000 CAS 61128-24-3,... 

Figure 2.4. Schematic illustrations of repeat units of several of the polymers listed in Table 2.2. (a) Poly(thiocarbonyl fluoride), (b) Poly(glycolic acid), (c) Polyepichlorohydrin. (d) Poly(maleic anhydride), (e) Poly(N-methyl glutarimide). (f) Poly(N-phenyl maleimide). (g) Poly[3,5-(4-phenyl-1,2,4-triazole)-1,4-phenylene]. (h) Phenoxy resin, (i) Poly(oxy-1,4-phenylene-oxy-1,4-phenylene-carbonyl-l,4-phenylene). (j) Udel. (k) Victrex. (1) Tori on. (m) Ultem. (n) Resin F.

Nether >s 1 for polyoxymethylene, polyepichlorohydrin (see Figure 2.4) and poly(vinyl ethyl ether), and 2 for Ultem (see Figure 2.4) and poly(vinyl butyral) (see Figure 2.9). Note that only (-0-) linkages between two carbon atoms will be counted as ether linkages. If there are silicon atoms on one or both sides of the oxygen atom, the linkage is not counted in Nether. For example, Nether=0 for poly(dimethyl siloxane). 

If there are no "floppy" backbone rings along the chain backbone, then x5=NBBrot, where NBBrot was defined in Section 4.C. For example, x5=2 for poly(vinyl alcohol) (Figure 4.2) and X5=8 for Ultem (Figure 2.4). 

Poly(aryl ketones) (PEEK, PEK, and PEKK) are commercial high temperature polymers offering an excellent combination of properties combined with thermoplastic behavior. Poly(aryl ether ketone) PAEK blends have been reviewed by Harris and Robeson [1989]. Miscibility with PEI (Ultem 1000 GE) and other PI containing isopropylidene bridging units was noted. Arzak et al. [1997] reviewed the performance ofPEEK/PEI blends and noted a synergistic behavior in ductility and impact strength as reported earlier. Utility of these blends as a thermoplastic matrix candidate for advanced composites has been proposed [Harris and Robeson, 1989 Davis et al., 1992]. 

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... 

ULTEM (General Electric), one of the best commercial poly(ether imides), which is produced from dianhydride A and m-phenylenediamine, has a Tg of 215 °C [68]. When 50% of m-phenylenediamine was replaced by bis(aminoimide), a new copoly(ether imide) having Tg = 288 °C, and a temperature for the onset of degradation of 453 °C, was obtained. Its solubility was similar to that of ULTEM. 

Ultem GE Plastics trade name for its family of poly-ether-imide plastics. 

Ultem (Series) Poly(imide), thermoplastic General Electric... 

Mixed matrix membranes with zeolite as organic particles and polymeric matrices such as poly(vinyl acetate) (PVAc), Ultem , and Matri-mid have been prepared. The selectivity of nitrogen to oxygen nearly reaches a factor of 2 over conventional pure polymeric membranes. PI is superior to PVAc in mixed matrix membranes. This is attributed to a higher intrinsic selectivity of the polymer itself. Aminosilanes can be used as cou-... 

The miscibility of binary mixtures of poly(ether imide) (Ultem ) and a copolyester of bisphenol-A with terephthalic and isophthalic acids (50/50) (Ardel ) in three compositions (25/50,50/50, and 75/25) was studied by F. Cakar et al. (2012). 

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