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5.1 普通二元共聚合r值测算及精度 共聚合中最重要的参数是r值。它的正确测算,对研究共聚机理、共聚物组成与单体配料比及转化率的关系、共聚物的组成分布以及共聚物的链段分布等都有重要意义。 欲测算r值,首先必须假设共聚机理并获得数学模型,然后将实验数据纳入数学模型中,得出r值。将获得的r进行的回代推算值与实测数据相比较,可借以判断所采用的数学模型是否可靠,所设机理是否正确。
5.1 Ordinary binary copolymerization r value calculation and accuracy The most important parameter in copolymerization is r value. Its correct calculation is of great significance for the study of the copolymerization mechanism, the relationship between the copolymer composition and the monomer ratio and the conversion, the composition distribution of the copolymer and the distribution of the copolymer segments. To determine the value of r, we must first assume that the copolymerization mechanism and obtain a mathematical model, and then included in the mathematical model of experimental data to obtain r value. The calculated value of the obtained r is compared with the measured data to determine whether the mathematical model used is reliable and the correct mechanism is established.