Poly sulfide composition

Poly(phenylene sulfide-phenyleneamine-phenyleneamine) (PPSAA), 23 709 Poly(phenylene sulfide) (PPS), 10 201-202 23 639, 702, 704 highly sulfonated, 23 719-720 high molecular weight, 23 714 linear perfluorinated, 23 706 powder coatings, 7 41 Poly(phenylene sulfide) composites, 26 764... 

Zhang, L., Ma, C. and Mukerjee, S. 2005. Effect of copolymer composition on the oxygen transport properties of sulfonated poly(arylene ether sulfone) and sulfonated poly(sulfide sulfone) PEMs. Journal of the Electrochemical Society 152 A1208-A1216. 

Ethylene sulfide has been employed as an intermediate in poly meric compositions from cryanamide,70 biguanide,78 and guanylurea,71 which are claimed to be UBeful aa insecticides, rubber addenda, and dehairing agents. 

Odian et a1 (Refs 113,133 150) showed that the deflagration rates of many composite AP solid propints were affected by gamma doses of 5 x I07 R. Two poly sulfide-based proplnts (Thiokol TP-L-3014 and TP-L-3014a) showed rate decreases, polyurethane (Thiokol TP-6-3129), polyacrylate (Hercules HES-6420) and polyacrylonitrile (HES-6648) based proplnts showed increases, while hydrocarbon (Thiokol TP-H-3062) and cellulose acetate (Hercules HES-5808) proplnts showed no changes in deflagration rate. Since the composite propint formulations contain various additives besides the binder and oxidizer, an effort was made to determine the effect of radiation on the deflagration rates of binder and oxidizer separately and independent of additives... 

Table 5.4 Abrasion Resistance of Fluoropolymer/oxidized Poly(phenyl-ene sulfide) Composites ...

B. B. Gupta, A. B. Auerbach, and B. L. Davies. Poly(arylene sulfide) compositions having improved processability. US Patent 5 824767, assigned to Hoechst Celanese Corporation (Warren, NJ), October 20,1998. 

Kim NH, Kuila T, Kim KM, Nahm SH, Lee JH. Material selection windows for hybrid carbons/poly(phenylene sulfide) composite for bipolar plates of fuel cell. Polym Test 2012 31(4) 537 5. 

Ma CCM, Lee CL, Chang MJ, Tai NH, Effect of physical aging on the toughness of carbon fiber-reinforced poly(etheretherketone) and poly(phenylene sulfide) composites. Part 1, Polym Composites, 13(6), 441-447, 1992. 

The composition of monocomponent sealants includes curing agents covered by a film made up of polymer aqueous solutions. Materials obtained through poly-sulfide oligomer curing with alcoholates or glycolates of alkaline or alkahne-earth metals (4 parts alcoholates at 100 parts oligomer) or with anhydrous alkaline peroxides are known [74]. 

Fig. 11.41 Plot of crystallization half-time for crystallization of poly(phenylene sulfide) in blends with linear polyethylene and with poly(ethylene terephthalate) as a function of crystallization temperature. Pure poly(phenylene sulfide) . Composition poly(phenylene sulflde)-linear polyethylene blends 50/50 A 75/25 o 90/10. Composition poly(phenylene sulfide)-poly(ethylene terephthalate) blends 50/50 T 75/25 A 90/10. (From Jog et al. (81))...

In addition to carbon and glass fibers ia composites, aramid and polyimide fibers are also used ia conjunction with epoxy resias. Safety requirements by the U.S. Federal Aeronautics Administration (FAA) have led to the development of flame- and heat-resistant seals and stmctural components ia civiUan aircraft cabias. Wool blend fabrics containing aramids, poly(phenylene sulfide), EDF, and other inherently flame-resistant fibers and fabrics containing only these highly heat- and flame-resistant fibers are the types most frequently used ia these appHcations. 

Poly(phenylene sulfide) (PPS) is another semicrystalline polymer used in the composites industry. PPS-based composites are generally processed at 330°C and subsequently cooled rapidly in order to avoid excessive crystallisation and reduced toughness. The superior fire-retardant characteristics of PPS-based composites result in appHcations where fire resistance is an important design consideration. Laminated composites based on this material have shown poor resistance to transverse impact as a result of the poor adhesion of the fibers to the semicrystalline matrix. A PPS material more recently developed by Phillips Petroleum, AVTEL, has improved fiber—matrix interfacial properties, and promises, therefore, an enhanced resistance to transverse impact (see PoLYAffiRS containing sulfur). 

PP-g-MA) silicate nanocomposites and intercalated thermoset silicate nanocomposites for flame-retardant applications were characterised by XRD and TEM [333], XRD, TEM and FTIR were also used in the study of ID CdS nanoparticle-poly(vinyl acetate) nanorod composites prepared by hydrothermal polymerisation and simultaneous sulfidation [334], The CdS nanoparticles were well dispersed in the polymer nanorods. The intercalation of polyaniline (PANI)-DDBSA (dodecylbenzene-sulfonate) into the galleries of organo-montmorillonite (MMT) was confirmed by XRD, and significantly large 4-spacing expansions (13.3-29.6A) were observed for the nanocomposites [335],... 

Colloidal sulfide, selenide, telluride, phosphide, and arsenide semiconductor particles are prepared by the controlled precipitation of appropriate aqueous metal ions by H2S, H2Se, H2Te, PH3, and AsH3, respectively. Colloids are stabilized, typically, by sodium poly-phosphate. A large number of experimental parameters determine the size, size distribution, morphology, and chemical composition of a semiconductor particles in a given preparation. Concentrations, rates, and the order of addition of the reagents the counterions selected ... 

As an additional component, various thermoplastic polymers can be used. As a binder for copper clad laminates, a solution of solid epoxide resin (Epikote 1001), BPA/DC prepolymer, Zn acetate and poly(phenylene sulfide) was used [83], Other binders for reinforced plastics contain polysulfone. Such compositions consist of liquid BPA/ECH epoxide resin, BPA/DC prepolymer, polysulfone and bis(4-hydro-xyphenyl)sulfone [85]. Bis(4-aminophenyl)sulfone can be also added [86]. In such systems the bisphenol reacts with the epoxide resin as a chain extension agent, whereas the diamine crosslinks the diepoxide. The Tg values are close to 200 °C. They can be increased a little, if the BPA/ECH epoxide resin is replaced by the tetra-epoxide A,A,A, A -tetrakis(2,3-epoxypropyl)diaminodiphenylmethane [87]. 

Before we take a look at a mineral in which all of the tetrahedral sites are occupied, let us look at the polymorph of sphalerite, called wurtzite, which has AB closest packing of the sulfide ions. The word polymorph is derived from poly, meaning more than one, and morph, meaning form. Polymorphs are two or more compounds that have the same composition but a different arrangement of atoms. A portion of the structure is shown in Figure 46. 

In polymers such as polybhenylenes there are a few aliphatic linkages and many aromatic rings which account for their improved heat resistance. Several polyphenylenes are shown in Figure 1.37. Poly (phenylene oxide) has excellent dimensional stability at elevated temperatures. Repeated steam autoclaving does not deteriorate its properties. Poly(phenylene sulfide) is completely nonflammable. It is used in the form of composites with both asbestos and glass fibers. 

S. B. Brown, C.-F. R. Hwang, H. Ishida, J. J. Scobbo, Jr., and J. B. Yates, III. Functional poly(phenylene ether)/poly(arylene sulfide)/epoxy function alpha olefin elastomer/elastomeric block copolymer/metal salt compositions and process for making thereof. US Patent 6303708, assigned to General Electric Company (Pittsfield, MA), October 16, 2001. 

The sulfide group in PPS can be oxidized in a mixture of glacial acetic acid, concentrated sutfijric acid, and concentrated hydrogen peroxide at 55°C within 3 h to 5deld a polymer with sulfone groups. This modified polymer is used with poly(tetrafluoroethylene) (PTFE) for composites with improved abrasion resistance. 

Y. Satake and T. Ono. Poly (arylene sulfide) resin composition. US Patent 5650459, assigned to Kureha Kagaku Kogyo K.K. (Tokyo, JP), July 22, 1997. 

---