POLYPHENYLENE-OXIDE PPO, NORYL

Polyphenylene-Oxide (PPO, Noryl) PPO appeared in 1964 as a conjugated oxidation product of phenolic monomers. 

It may be conveniently processed via extrusion, injection and blow molding, as well as stractural foaming. It is customary to reinforce with up to 30% glass fibers, and it is utilized in machinery and pumps, dishes (that may be directly heated on the fire), and various elements in transportation. Novel developments have led to a higher heat deflection temperature of 150 C, and enhanced impact strength. 

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Injection moldable polyphenylene oxide (PPO, Noryl) was produced by A. S. Hay in the earlv 1960 s by the copper-amine catalyzed oxidation of xylends. (21)The commercial product is a blend of PPO and polystyrene. PPO is being produced at an annual rate of 70 thousand tons in the U.S. and it is anticipated that the annual production in the late 1980 s will exceed 175 thousand tons. 

Modified polyphenylene oxide Polyphenylene oxide PPO Noryl, Norylux, Uninor, lupiace... 

Polyphenylene oxide (PPO) or Polyphenylene ether (PPE) is an amorphous polymer with a softening temperature of about 210 °C. To improve its processability it is mostly blended with PS (modified PPE, e.g. Noryl ), which is at the cost of its heat distortion temperature. The properties are excellent the applications are mainly in fine-mechanical construction, in automotive parts, in household equipment etc. 

An important requirement for plastics materials in the automotive industry is paintability alongside metal components in high temperature areas. Noryl GTX series of General Electric has been developed to meet this requirement. The blend consisting of polyphenylene oxide (PPO) in a nylon matrix combines the heat and dimensional stability and the low water absorption of PPO with the flow and semicrystalline properties of nylons. Its impact strength, however, is not as high as PC/PBT blends. 

Polystyrene modified polyphenylene oxide (PPO) or Noryl can be hot plate welded at 260 to 288°C and 20 to 30 s contact time. Unmodified PPO can be welded at hot plate temperatures of 343°C. Excellent spin welded bonds are possible with modified polyphenylene oxide (PPO), because the low thermal conductivity of the resin prevents heat dissipation from the bonding surfaces. Typical spin welding conditions are rotational speed of 40 to 50 ft/min and a pressure of 300 to 400 psi. Spin time should be sufficient to ensure molten surfaces. 

Polyphenylene oxide (PPO) is a high heat polyether made by oxidatively coupling 2,6-xylenol. The polymer was invented by Allan Hay of General Electric [1-3] and is the basis for the Noryl product line. 

The first major industrial use of thermoplastics (a filled blend of polycarbonate [PC] and acrylonitrile-butadiene-styrene [ABS]) in an automotive exterior door panel, rocker panel, and rear panel was introduced by The Dow Chemical Company in a special process developed for the General Motors Saturn line of vehicles. A formulated blend of nylon 6,6 and polyphenylene oxide (PPO), known as Noryl GTX, also was introduced at the same time in those same Saturn vehicles by General Electric Plastics (now SABIC) using a special assembly line procedure (Figures 9 and 10). 

Noryl n Poly(phenylene oxide) Trade name for a family of blends of polyphenylene oxide (PPO) with much less costly styrenic polymers. These blends have the processability, low water absorption, and good dielectric properties associated with polystyrene, while the PPO contributes heat resistance. Glass-reinforced grades are available. Manufactured by General Electric, U.S. 

A family of engineering thermoplastics based on the above technology includes PPO polyphenylene oxide, Noryl thermoplastic resins (modified... 

To the range of engineering plastics were added polyethylene and polybutylene tereph-thalates (PET and PBT), as well as General Electric s polyethers, the PPO (polyphenylene oxide) produced through polymerization of 2,6-xylenol and the Noryl plastic produced by blending PPO with polystyrene. Other special polymers, derived like the polycarbonates from bisphenol A, were added to this range polyarylates, polysul-fones, polyetherimides. 

Norpex, PPO-based engineering thermoplastics. Custom Resins Group Norsfl, Two-component siUcones, Insulcast Noryl, Polyphenylene oxide-based resin, GE Plastics... 

Chapter 9, Polyphenylene Ether Blends and Alloys, from GE Plastics describes traditional and new polyphenylene-ether grades based on GE Plastics Noryl . GE Plastics originally invented polyphenylene ether (PPE), its blends and alloys, and PPO polyphenylene oxide. Noryl is typically... 

Plastics International, Noryl PPO (Modified Polyphenylene Oxide), http // www.plasticsintl.com/datasheets/419943590Noryl.pdf. 

PPO (Polyphenylene oxide) - is often discovered under the trade mark "Noryl". It is an engineering polymer which has superior physical properties and temperature resistance when compared with ABS. It suffers some UV degradation but has nonetheless found widespread use in the personal computer industry. 

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