Study on the chain conformation of polymers.Ⅱ.Conformational characteristics of 1,2-polybutadiene an

来源 :Acta Chimica Sinica(English Edition) | 被引量 : 0次 | 上传用户:wori147258
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In this work,improvement was made for conformational analysis of 1,2-polybutadiene bymeans of the molecular mechanics force field program(MM2).Thus the first and the second orderinteraction energies obtained are much more reasonable.The characteristic ratio of isotactic 1,2-polybutadiene was emphasized properly,which varied with energy E(E=E_η+E_ω″).In the sametime,the characteristic ratios for isotactic chain of polystyrene and so on were noticed,which variedwith energy E according to the same way as that for isotactic 1,2-polybutadiene.It is shown thatthere is a general rule or a common feature for isotactic chains of poly-α-olefine and vinyl polymer. In this work, improvement was made for conformational analysis of 1,2-polybutadiene by means of the molecular mechanics force field program (MM2). Thus the first and the second order Interaction energies obtained are much more reasonable. The characteristic ratio of isotactic 1,2 -polybutadiene was emphasized properly, which varied with energy E (E = E_η + E_ω "). In the sametime, the characteristic ratios for isotactic chain of polystyrene and so on were noticed, which varied with energy E according to the same way as that for isotactic 1,2-polybutadiene. It is shown that that is a general rule or a common feature for isotactic chains of poly-α-olefine and vinyl polymer.
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