Polyarylene sulfide

DeSchryver et al. (1) prepared polybrominated polystyrene that was effective as a flame-retardant fiber. Polyarylene sulfide oxide prepared by Muraoka et al. (2) was also effective as a heat-resistant agent. 

The above two methods as well as other methods of polymerization have been reviewed by Smith (7). We have discovered a new process for the preparation of a wide variety of polyarylene sulfides (8). For example, polyphenylene sulfide may be prepared by the reaction of p-dichlorobenzene and sodium sulfide in a polar solvent. 

Related methods for preparing polyarylene sulfides are discussed in Section 4. 

To improve on Ryton PPS, Phillips introduced a family of high-temperature performance polyarylene sulfide (PAS) polymers. The crystalline form, PASl, is said to be suitable for structural components at... 

H. R. Fubowitz and C. H. Sheppard. Reactive polyarylene sulfide oligomers. US Patent 5 780 583, assigned to The Boeing Company (Seattle, WA), July 14, 1998. 

S. Inoue and O. Komiyama. Process for the preparation of polyarylene sulfide. US Patent 6600009, assigned to Dainippon Ink and Chemicals, Incorporated (Tokyo, JP), July 29,2003. 

S. Horiuchi, A. Ishio, and K. Saitoh. Method for producing a polyarylene sulfide. US Pafent 7115704, assigned to TORAY Industries, Inc. (Tokyo,... 

Y. Koyama, N. Ogata, and H. Nishitani. Process for manufacturing polyarylene sulfide. US Pafenf 5 635 587, assigned to Idemitsu Petrochemical Co., Ltd. (Tokyo, JP), June 3, 1997. 

M. Miyahara, N. Saitou, and M. MatsuzaJd. Method of continuously cleansing polyarylene sulfide. US Patent 7 094 867, assigned to Kureha Corporation (Tokyo, JP), August 22, 2006. 

Y. Imai, O. Komiyama, and K. Ichikawa. Process for controlling a particle size of polyarylene sulfide and polyarylene sulfide thus produced. US Patent 5475081, assigned to Tonen Chemical Corporation (Tokyo, JP), December 12, 1995. 

D. Fleischer, H. Stratz, J. Kulpe, and A. Schleicher. Oxidized polyarylene sulfides. US Patent 6020442, assigned to Ticona GmbH (DE), February 1, 2000. 

H. Scheckenbach, A. Schleicher, J. Kulpe, and B. Jansen. Mixtures of fluoro-polymers and oxidized polyarylene sulfides. US Patent 5 708 089, assigned to Hoecht AG (Frankfurt, DE), January 13, 1998. 

S. Inoue, M. Okamoto, and M. Yanagi. Polyarylene sulfide resin composition. JP Patent 58 154 757, assigned to Toray Industries, September 14,1983. 

Lenz RW, Handlovits CE, Carrington WK. Method for preparing linear polyarylene sulfide. US patent 3274165, assigned to Dow Chemical Co 1966. 

A. Oxidized polyarylene sulfides. US patent 6 020442, assigned to Ticona GmbH, DE 2000. 

B. Mixtures of fluoropolymers and oxidized polyarylene sulfides. US patent 5708089, assigned to Hoecht AG, Frankfiort, DE 1998. 

Scheckenbach H, Schleicher A, Kulpe J. Mixtures of polyarylene sulfones with polyarylene sulfoxides and polyarylene sulfides. US... 

Polyarylene sulfides (PPS), (-(j)-S-)n, was commercialized in 1971 as Raytori R. The resin is semicrystalline with Tg = 194 °C and T = 288 °C thus Tprocess > 290 °C. PPS is difficult to mold - it tends to adhere to the mold surface and to flow into mold crevices. It has also relatively poor impact resistance. Blends have been developed to alleviate these problems, e.g., with 25 wt% of either PSF, PPE, or PC (BaUey 1977). Commercial PPS blends are available with PPE (e.g., DlC PPS commercialized in 1982, NoryF APS), PARA (RTP 1300), or PTFE (Lubricomp PPS). They show good processability with reduced flash, are tough, excellent wear, as well as high heat, solvent, chemical, and oxidation resistance. 

Compatibilized blends of polyarylene sulfide with epoxy-functimialized polydimethylsiloxane have been prepared by Han (1994). An amine-terminated polysiloxane was functioned in solution with a chloro-epoxy triazine. Blends of 95 5 PPS polysiloxane were extruded at 130-290 °C to provide compositions with markedly improved mechanical properties compared to a similar blend containing unfunctionalized polysiloxane. 

Compatibilized blends of polyarylene sulfide with SEBS-g-MA have been prepared by Hisamatsu et al. (2000). Possibly an amine-terminated PPS reacts with anhydride to form a compatibilizing copolymer. Blend properties were measured as a function of MA content on SEES. Nam et al. (2003) prepared compatibilized blends of PPS with ABS-g-MA in a TSE. Blends were characterized using optical microscopy, SEM, FTIR, DMA, and heat distortion temperature. 

Polyarylene sulfide n. Any of a polymer family prepared by polymerization and reaction of polyhalogenated aromatics with sodium sulfide in a polar solvent at high temperature. The best known (and only commercial) resin is polyphenylene sulfide. 

A boron-containing rmcleating agent is used with a polyarylene sulfide. Boron nitride was foimd to be particularly beneficial, especially in its hexagonal crystalline form. The crystallization properties of PAS are significantly improved. ... 

Polyetherketoneketone is added at a low level of up to 3 wt% to polyarylene sulfide to increase its nucleation." ... 

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