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Noryl physical

Physical or chemical vapor-phase mechanisms may be reasonably hypothesized in cases where a phosphoms flame retardant is found to be effective in a noncharring polymer, and especially where the flame retardant or phosphoms-containing breakdown products are capable of being vaporized at the temperature of the pyrolyzing surface. In the engineering of thermoplastic Noryl (General Electric), which consists of a blend of a charrable poly(phenylene oxide) and a poorly charrable polystyrene, experimental evidence indicates that effective flame retardants such as triphenyl phosphate act in the vapor phase to suppress the flammabiUty of the polystyrene pyrolysis products (36). [Pg.475]

Compatible Polyblends. When the polymeric materials are compatible in all ratios, and/or all are soluble in each other, they are generally termed polyalloys. Very few pairs of polymers are completely compatible. The best known example is the polyblend of polyCphenylene oxide) (poly-2,6-dimethyl-l,4-phenylene oxide) with high-impact polystyrene (41). which is sold under the trade name of Noryl. It is believed that the two polymers have essentially identical solubility parameters. Other examples include blends of amorphous polycaprolactone with poly(vinyl chloride) (PVC) and butadiene/acrylonitrile rubber with PVC the compatibility is a result of the "acid-base" interaction between the polar substituents (1 ). These compatible blends exhibit physical properties that are intermediate to those of the components. [Pg.230]

The author wishes to associate to this work the specific contribution of Drs.J.Verhoeven (NL) and Dr.R.Hepp (IND) for the Xenoy" developments. Dr.R.j an der Meer (NL). Dr. B. Galluccl (MASS) and R.Avakian (NL) for the Noryl GTX developments as well as the scientific support from GH Central Research Development Polymer Engineering Physics Laboratories from Dr.P.Juliaiio and Dr.S.Hobbs. General Electric Plastics acknowledges the spearheading scientific contributions of professors D.Helkens. [Pg.224]

This test is used as a method for predicting the longterm effects of contact materials or environments on the physical properties of Noryl. The test uses specimens which are exposed under strained conditions at various temperatures duplicating as closely as possible the effect of residual and induced stresses in a fabricated part. By measuring the loss of certain physical properties we can estimate the effects of exposure to the environment on a Noryl application. [Pg.984]

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. [Pg.194]


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