6.17 In the polymerization of styrene (1.0 mol/L) in benzene initiated by di-t-butylperoxide (0.01 mol/L) at 60°C, the initial rates of initiation and polymerization are 4.0×10-11 mol/L-s and 1.5x10- mol/L-s, respectively. (a) Calculate the initial kinetic chain
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
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![6.17 In the polymerization of styrene (1.0 mol/L) in benzene initiated by di-t-butylperoxide
(0.01 mol/L) at 60°C, the initial rates of initiation and polymerization are 4.0x10-1
mol/L-s and 1.5x10- mol/L-s, respectively. (a) Calculate the initial kinetic chain
length. (b) Calculate the initial polymer molecular weight, assuming that termina-
tion of chain radicals takes place only by coupling, besides chain transfer to various
species.
initiating radical frem the peroxide. [Data (all at 60°C): CM = 5.0x10-3; =
7.6x10-4; Cs = 2.3x10-6; density of benzene = 0.85 g/mL; density of styrene = 0.91
g/mL.]
[Ans. (a) 3.75×10³; (b) M, = 4.9×10°; (c) 0.60]
(c) Indicate how often, on the average, chain transfer occurs per each
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