本文用机率方法对A_a—B_b型缩聚反应的溶胶凝胶分配问题进行了一般理论分析,对A_3—B_2特例进行了具体讨论并得到了溶胶分数与总反应程度、溶胶分数与溶胶反应程度以及溶胶反应程度与总反应程度的关系式。 用甘油和己二酸进行了聚酯热固化反应,测定了S,p_b和p＇_b等物理量。将实验值与理论值进行了比较,结果表明,实验值与理论值基本相符。 In this paper, the general theoretical analysis of the sol-gel distribution of A_a-B_b polycondensation reaction is carried out using the probability method. The special case of A_3-B_2 is discussed in detail and the sol fraction and total reaction degree, the sol fraction and the sol reaction degree, The relationship between the degree of reaction and the degree of total reaction. Polyester thermosetting reaction was carried out with glycerol and adipic acid, and physical quantities such as S, p_b and p’_b were measured. The experimental value and theoretical value were compared, the results show that the experimental value and theoretical value basically consistent.