Vinyl nitrate polymer

The properties are very sensitive to composition and the charge carriers are apparently positive. Other studies have shown poly(acenaph-thalene) to be only slightly photo-conductive while the nitrated polymer exhibits a photocurrent dependent upon the degree of nitration (100). Since the number of mobile n electrons is the same as in poly (vinyl naphthalene), the authors conclude that some form of stereoregularity is required for enhanced conductivity. Complexes of poly(vinyl anthracene) with halogen molecules show enhanced conductivity and reduced activation energy which is thought to be typical of an electronic semiconductor (101). 

Vinyl chloride polymers, cellulose derivatives (acetate and nitrate), and acrylic copolymers can be formulated to remain tough over a wider range of temperatures than most homopolymers, so they have been favored for lacquers. 

Vinyl Polymers. See in Vol 8, P353-R to P358-R under Polyvinylacetate, Polyvinylalcohol, Polyvinyl Chloride or Polyvinyl Nitrate (PVN) and in this article under appropriate entries... 

Zhu, W. and Weil, E.D., A paradoxical flame-retardant effect of nitrates in ATH-filled ethylene-vinyl acetate copolymer, J. Appl. Polym. Sci., 56, 925-933, 1995. 

Polymers with phenyl pendant groups such as those present in polystyrene undergo all of the characteristic reactions of benzene, such as alkylation, halogenation, nitration, and sulfonation. Thus, oil-soluble polymers (e.g., poly(vinyl cyclohexylbenzene) used as viscosity improvers in lubricating oils are obtained by the Friedel-Crafts reaction of polyst3frene... 

The basic pattern of the coagulation of polymer latices with aluminum salts has been clearly demonstrated by the work of Matijevic and his collaborators (1968) using styrene-butadiene. poly(vinyl chloride) (1977). and PTFE (1976) latices. The results obtained by Matijevic and Force (1968b) for the coagulation of styrene-butadiene latices using alumi num nitrate are shown in Fig. 13. From these it can be seen that up to a pH of 3.4 the ccc remains constant at 5 x 10 mol dm" and then decreases between pH 3.4 and 4.8 to reach a constant value of... 

Another kind of early slurry was that developed by Gehrig of Atlas Chemical Industries [85]. It consisted of a saturated solution of ammonium nitrate in nitric acid of 60-70% IINO3 and some organic substances which are not attacked by nitric acid, for example, vinyl polymers. However handling of the solution with nitric acid is difficult and can be dangerous. A fire occurred in a factory in Rourkela (India) in 1972 througli spilling nitric acid slurry on wooden boards [86]. 

METHYL STYRENE or 3-METHYL STYRENE or 4-METHYL STYRENE or m-METHYL STYRENE or p-METHYL STYRENE mixed Isomers (25013-15-4) C,H,o Flammable liquid. Forms explosive mixture with air (flash point 125°F/51°C). An inhibitor, usually 10 to 50 ppm of tert-butyl catechol, must be present in adequate concentrations to avoid explosive polymerization. Violent reaction with strong oxidizers, strong acids, peroxides and hydroperoxides. Incompatible with catalysts for vinyl or ionic polymers aluminum, aliuninum chloride, ammonia, aliphatic amines, alkanolamines, caustics, copper, halogens, iron chloride, metal salts (e.g., chlorides, iodides, sulfates, nitrates). The uninhibited monomer vapor may block vents and confined spaces by, forming a solid polymer material. On small fires, use dry chemical powder (such as Purple-K-Powder), foam, or CO extinguishers. a-METHYL STYRENE (98-83-9) C,H, Flammable liquid. Forms explosive mixture with air [explosion limits in air (vol %) 0.9 to 6.1 flashpoint 129°F/54°C autoignition temp 1066°F/574°C Fire Rating 2]. Easily polymerizable. Unless inhibited, forms unstable peroxides. Reacts with heat and/or lack of appropriate inhibitor concentration. Reacts with catalysts for vinyl or ionic polymerization, such as aluminum, iron chloride or 2,5-dimethyl-2,5-di(ieri-butylperoxy)hexane. Violent reaction with... 

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