Physics, 22.02.2020 03:06 fattypickeltoefungus
Assuming that in free-radical polymerization the rate coefficients for initiator dissociation, propagation and termination can be replaced by the appropriate Arrhenius expressions kd = Ad exp (āEd /RT) kp = Ap exp (āEp /RT) kt = At exp (āEt /RT) calculate the changes in the rate of polymerization and the degree of polymerization caused by increasing the temperature of polymerization of styrene in benzene, initiated by azobisisobutyronitrile, from 60 Ā°C to 70 Ā°C given that: Ep = 34 kJ molā1 Et = 1 kJ molā0 1 Ed = 126 kJ molā1 Assume that the concentration of monomer and initiator and the values of f and q remain unchanged when the temperature is increased.
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Assuming that in free-radical polymerization the rate coefficients for initiator dissociation, propa...
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