Termination rate constants in radical polymerization

摘要: A rate constant is generally derived by using Fick's equation corresponding to the spherical interdiffusion of particles. By this constant, chain and primary radical termination constants can be approximated for bimolecular reactions between two ends, end, respectively. The former given ks = 8πNLDsLs exp { − Ls/Rs} × 10−3 1./mole-sec. latter ksi 4πNL(Ds + Di)Lsi Lsi/Rsi} Here, NL Avogadro's number; Ds Di are diffusion end radical, respectively; Ls Lsi are, respectively, distances ends a at thermal energy equal coulombic interaction net charges; Rs Rsi average on collision.