Acceleration polymerization

The Hquid is basically a methacrylate monomer having a suitable inhibitor to ensure adequate shelf life. A/Ai -Dimethyl-/)-toluidine [99-97-8] is probably the most common polymerization accelerator although A/A/-bis(2-hydroxyethyl)- -toluidine and/or a sulfinate salt, eg, sodium -toluene sulfinate [873-55-2], also maybe used. 

The chain extenders, when added to PET of a certain degree of polymerization accelerate the polycondensation but not when they react... 

The presence of the solid phase is not the only possible cause for radical immobilization. The matrix effect caused by retarded termination due to reduced radical mobility, is another example of polymerization acceleration (see Chap. 5, Sect. 2.2, Fig. 3). Under suitable conditions, the matrix effect can even be caused by solvents. 

When living centres are slowly generated, the polymerization accelerates with time. Older centres have time to grow to larger dimensions than the fresh centres. Several authors [22-24] have paid attention to kinetic analysis of living polymerizations with slow initiation, the most recent of these studies being that of Pepper [25]. 

The polymerization rate will then depend on the relative proportions and activities of Cf, C, etc. (which will be determined by A/T and Kj, Kf, etc., and the propagation coefficients.) Thus, it has been found with (7r-CsH5)2TiEtCl/AlEtCl2 that the rate of ethylene polymerization accelerates with time as active species are formed and with increase in Al/Ti ratios the rate rises to a steady value at constant Ti concentration and [C ] [Ti]o, and passes through a maximum at constant metal alkyl halide concentration. 

Use Intermediate, corrosion inhibitor, electroplating brightener, defoliant, polymerization accelerator, stabilizer for chlorinated hydrocarbons, cosolvent for paint and varnish removal. 

The reactivity of the amine as a polymerization accelerator depends upon the a+ value of the meta- or para-substituent of the amine, where a+ is the electrophilic substituent parameter previously described and tabulated (23). When the kinetic rate constant (or the reciprocal of the polymerization time with amine and peroxide initial concentrations held constant) is plotted against the a+ value on a semi-logarithmic plot (Figures 1 and 2), an inverted "V" shaped curve results. The kinetic data for Figure 1 were taken from a published article describing the polymerization of methyl methacrylate in the presence of BP and various tertiary aromatic amines as shown in Figure 2 ( 5). ... 

QUINOLOR (94-36-0) Combustible solid (autoignition temperature 176°F/80°C). Power, dust, or vapor forms explosive mixture with air. Confined storage of dry chemical may lead to decomposition and explosion. A strong oxidizer extremely reactive with many substances. An explosive that is sensitive to friction, shock, and heat may decompose below the melting point of 217°F/103°C. Fire and/or explosions may result from contamination contact with strong acids, combustible materials, reducing agents, oxidizers, acids, bases, alcohols, amines, aniline, V,V-dimethylaniline, ethers, metals, metal oxides, polymerization accelerators, lithium... 

The three isomeric diallyl phthalates are colorless liquids of mild odor, low volatiUty, and relatively slow polymerization in the eady stages. At ca 25% conversion, the viscous liquid imdeigoes gelation and polymerization accelerates however, the last monomer disappears at a slow rate. 

The monomer of the polymer is mixed with the enzyme solution to aggregate with the aid of polymerization accelerator (including the crosslinking agent). 

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