Polymeric polymerization

Triphosphonitrilic chloride, (PNCla)3 Tetraphosphonitrilic chloride, (PNC12)4 Pentaphosphonitrilie chloride, (PNC12)6 Hexaphosphonitrilic chloride, (PNClJ, Heptaphosphonitrilie chloride, (PNC12), Polyphosphonitrilic chloride, (PNCla)n 114° 123-5° 40-5° 41° 90° below —18° below 500° 127° 188° 223°-224-3° 261°-263° 289°-294° depolymerizes 256-5° 328-5° polymerizes polymerizes polymerizes on distillation... 

Polymerization Polymerizes polymerizes readily in water Budavari et al. 1989... 

Monomeric Polymeric Polymeric Polymeric med. vise. high vise. high perf. ... 

Eastman Chemical has utilized a unique, high temperature solution process for propylene polymerization. Polymerization temperatures are maintained above 150°C to prevent precipitation of the isotactic polypropylene product in the hydrocarbon solvent. At these temperatures, the high rate of polymerization decreases rapidly, requiring low residence times (127). Stereoregularity is also adversely affected by high temperatures. Consequentiy, the... 

Polymerization. Polymerization reactions, which are addition reactions, are used to produce the principal products formed direcdy from butlylenes butyl elastomers polybutylenes and polyisobutylene (see Elastomers, synthetic Olefin polymers). 

Polymerization - Polymerization is occasionally used to convert propene and butene to high octane gasoline blending components. The process is similar to alkylation in its feed and products, but is often used as a less expensive... 

Chemical Reactivity - Reactivity with Water No reaction Reactivity with Common Materials No reactions Stability During Transport Explosive decomposition when contaminated with peroxides formed by reaction with air Neutralizing Agents for Acids and Caustics Not pertinent Polymerization Polymerization inhibited when stabilizer is used Inhibitor of Polymerization tert-Butylcatehol (0.01 -0.02%). 

Aliphatic disulfides are not thought to be effective as initiators in this context. However, Endo et a . K have described the use of the cyclic 1,2-disulfides 11 and 12 as initiators in a controlled radical polymerization. Polymerization of S at 120 °C gave a linear increase in molecular weight with conversion and the PS formed was used as a macroinitiator to form PS-6/oet-PMMA. The precise mechanism of the process has not been elucidated. 

Homolytic decompn when heated or irradiated with prodn of free radicals for org synthesis difficult to hydrolyze and reduce rearrangement crosslinking and polymerization polymeric peroxides are thick liqs or amorph wh powds used as polymerization catalysts... 

A widely used synthetic procedure is radical polymerization, polymerization by a radical chain reaction (Section 13.9). In a typical procedure, a monomer (such as ethene) is compressed to about 1000 atm and heated to 100°C in the presence of a small amount of an organic peroxide (a compound of formula R—O—O -R,... 

Polymerization Polymerized components will present an explosion hazard in open air. 

C3H5)2Sn, 13 (CjHs) CISn, 21 Cl2Sn, 28 (Me5C5)2Sn, 3 monomeric monomeric monomeric monomeric monomeric, polymerizes on standing monomeric only in coordinat. solvents ionized or strongly coordinated monomeric polymeric polymeric, one-dimensional polymeric monomeric 104,105 >106) 93,94,107) 20) 29,83)... 

Monomers, such as ethylene, propylene, isobutylene, and isoprene, containing the carbon-carbon double bond undergo chain polymerization. Polymerization is initiated by radical, anionic or cationic catalysts (initiators) depending on the monomer. Polymerization involves addition of the initiating species R, whether a radical, cation, or anion, to the double bond followed by its propagation by subsequent additions of monomer... 

Fig. 6. Amount of coagulum as a function of the emulsifier concentration in 1,4-DVB polymerization. Polymerization temperature = 50 °C,water/monomer volume ratio = 6.25 (0),and 12.5 ( ). [Reproduced from Ref. 79 with permission, Hiithig Wepf Publ., Zug, Switzerland].

Monolayer Polymerization. Polymerization of the highly ori-ented monomer films can simply be achieved by UV irradiation under nitrogen (Figure 8.). The polymerization of the diacetylene monomers (2, 5-9) is a topochemical reaction (32,38) that only takes place, if the monomers are perfectly orderecTT i.e. in the crystalline state or in oriented mono- (32) or multilayers (39) and leads to the formation of conjugated Tlue and red colorecT polymer backbones (Eqn. I.). 

Polymerization Polymerize Catalytic Unite two or more olefins Cracked olefins High-octane naphtha, petrochemical stocks ... 

Transfer tissue to polyethylene-embedding capsules or gelatin capsules, fill the capsules with 100% LR White, and cap. Oxygen will inhibit polymerization. Polymerize 24 h at 50-55°C (see Note 19). 

POLYMERIZATION KINETICS (Irreversible) IRREVERSIBLE POLYMERIZATION Polymerization time course,... 

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