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A Monte Carlo method was used to take thorough account of the influences of different reactivity ratios and initial feed compositions on copolymer microstructure.The model proves the lack of azeotropic behavior in systems in which r_A>1 and r_B<1 or vice versa;it is also able to calculate the drift in the copolymer properties:copolymer composition,and randomness parameter.Moreover,for each reactivity ratio pair given,there is a unique reaction conversion,at which macromolecules produced inherit their maximum allowed alterations.This critical conversion declines as initial feed composition increases.However,for systems with r_A>1 and r_B>1,as well as those with r_A<1 and r_B<1,the azeotropic behavior of the reactions is clearly observed.Besides,copolymer composition reaches azeotrope point at the end of the reaction when r_A>1 and r_B>1.Finally,for systems in which r_A>1 and r_B>1,randomness parameter becomes maximum at azeotrope point when r_A equals r_B.
A Monte Carlo method was used to take thorough account of the influences of different reactivity ratios and initial feed compositions on copolymer microstructure. Model proves the lack of azeotropic behavior in systems in which r_A> 1 and r_B <1 or vice versa; it is also able to calculate the drift in the copolymer properties: copolymer composition, and randomness parameter. Moreover, for each reactivity ratio pair given, there is a unique reaction conversion, at which macromolecules produced inherit their maximum allowed alterations.This critical conversion declines as initial feed composition increases. However for systems with r_A> 1 and r_B> 1, as well as those with r_A <1 and r_B <1, the azeotropic behavior of the reactions is clearly observed .esides, copolymer composition reaches a zeotrope point at the end of the reaction when r_A> 1 and r_B> 1.Finally, for systems in which r_A> 1 and r_B> 1, the randomness parameter becomes maximum at azeotrope point when r_A equals r_B.