Intramolecular Reaction in Polycondensations. I. The Theory of Linear Systems

作者：Homer Jacobson, WALTER H. STOCKMAYER · 发表于：The Journal of Chemical Physics · 年份：1950 · DOI：10.1063/1.1747547 · 被引用次数：1409 · 研究领域：Advanced Polymer Synthesis and Characterization、Various Chemistry Research Topics、Chemistry and Chemical Engineering

For three types of linear polycondensing systems, equilibrium molecular size distributions, including rings as allowable species, are derived. Average molecular weights and amounts of ring and chain fractions are calculated therefrom. The fractions of rings are shown to increase with dilution, and with molecular weight. It is shown that beyond a critical dilution it is sometimes possible to obtain 100 percent yield of rings by driving the condensation to completion. Detailed calculations are made for two important cases corresponding to condensations of the decamethylene glycol-adipic acid type: (1) for equimolar amounts of the two monomers, and (2) unequal amounts, with one monomer type completely reacted.