Noryl resins

Noryl is a rigid dimensionally stable material. Dimensional stabiUty results from a combination of low mold shrinkage, low coefficient of thermal expansion (5.9 x 10 per° C), good creep resistance (0.6—0.8% in 300 h at 13.8 MPa (2000 psi)), and the lowest water absorption rate of any of the engineering thermoplastics (0.07% in 24 h at room temperature). Noryl resins are completely stable to hydrolysis. They are not affected by aqueous acids or bases and have good resistance to some organic solvents, but they are attacked by aromatic or chlorinated aUphatic compounds. 

General Electric is the only U.S. producer of Noryl resin and also has faciHties in Japan and Europe. DMPPO is also produced in Japan by Ashahi, Mitsubishi Gas Chemical, and Sumitomo. 

General Electric Company, Plastics Dept., Selkirk, New York, NORYL Resin Design Guide, CDX-83. 

Noryl resins became the world s most successful and best known polymer blends or alloys because combinations of PPO resins and styrene polymers tend to assume the best features of each ... 

A limitation is, however, encountered with Noryl resins indeed, because PS is a very brittle material, their impact strength decreases when the percentage of PS is raised [37]. To circumvent this problem, rubbers are added to Noryl resins to increase the toughness [39]. Thanks to the exceptional blending properties of PPO , numerous mixed materials have been developed, for instance, with diallyl phthalates, polysulfone, acrylates, coumarone-indene, or polyvinyl chloride (PVC) [39]. It has also been shown that PPO could be blended with styrene-butadiene block copolymers, hence allowing to expand the temperature of use of the resulting materials [40]. Accordingly, the combination of various... 

GE Plastics, Noryl Resin Design Guide, htq> //tools.geplaslics.com, 2006. 

Noryl resins modified PPE-PS. SABIC Innovative Plastics 2006. 

Blends of polyphenylene ether (PPE, also known as PPO ) with HIPS are, by far, the most successful of all the commercial blends. General Electric company, which originally introduced this blend commercially in 1964 under the trade name Noryl , has since sold all their Plastics business to Sabic. Noryl resins are now... 

Noryl resins n. Blends of poly-(2,6-dimethyl-l,4-phenyl oxide) with polystyrene or with high impact polystyrene. 

In particular, Chan and co-workers [7] discuss the tensile strength of Noryl resin which is a blend of poly(2,6-dimethyl-l,4 phenylene oxide) and PS. 

PPO is completely miscible with polystyrene and blends of the two products have glass temperatures between those of the two polymers. This result led to the commercialization of NORYL resins, one of the class of engineering thermoplastics. The discoveries which led to the commercial product as well as the scope of the oxidative coupling reaction are the subject of this paper. 

At this point in time a business decision was made by Dr. Jack Welch, the introduction of modified PPO resins which were given the name NORYL resins. The resins were projected to fill a market niche between the engineering plastics known at that time and the commodity resins. Today Noryl resin is one of the largest volume engineering thermoplastics. 

Figure 3-94. This wire system for GE Plastics Living Environments Concept House seen in Chapter 1 is made of GE s Noryl resin, for high heat resistance and easy processing. The raceway is a wire channel that runs along the wall, much like a baseboard, to contain electrical outlets, receptacles, telephone plugs, and cable connections. This extruded resin prototype raceway, which is featured in every room, as a UL 94 flammability listing of V-O.

NORYL resins are especially noted for their outstanding hydrolytic stability. The water absorption rate of all NORYL resins, both at room temperature and at elevated temperatures, are among the lowest of any engineering thermoplastic, which contributes to the retention of properties and dimensional stability in the presence of water, high humidity and even steam environments. In addition, NORYL resins are also virtually unaffected by most aqueous solutions, detergents, acids, and bases. 

Kramer, M., Noryl resins, flexibility of basic technology in a broad family of products, Appl Pofym. Sympos., 15, 227-238 (1970). 

Hay, A.S. (1998) Polymerization by oxidative coupling discovery and commerciahzation of PPO and Noryl resins. Journal of Polymer Science Part A Polymer Chemistry, 36, 505-517. 

SABIC Plastics, Noryl resin design data, 2014. 

The formation of poly (2,6-dimethyl-1,4-phenylene oxide) 2, later called PPO resin, represented a new method of polymerization which was termed polymerization by oxidative coupling. PPO was commercialized in 1964 and two year later blends of PPO with polystyrene, NORYL resins that are miscible blends of PPO and polystyrene, were commercially introduced. The scope and mechanism of the oxidative polymerization reaction and the historical development of PPO and its blends have been extensively reviewed previously... 

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