DBTM—St—BA三元共聚竞聚率的测定

Determination of reactivity Ratio of DBTM-St-BA tercopolymer system by microcomputer

根据改进的欧拉公式,解得Alfrey-Goldfinger微分方程的数值积分,将单纯形调优法与数值积分法相结合,建立数学模型并编写微机程序。采用红外光谱法测定不同转化率下DBTM(顺丁烯二酸二丁基锡酯)-St(苯乙烯)-BA(丙烯酸丁酯)三元共聚体系共聚物的组成。根据三元共聚体系的起始组成、和不同转化率下共聚物的组成,应用所编制的程序,计算该三元共聚体系单体的竞聚率。

In this paper, the compositions of DBTM—St—BA tercopolymers at different conversion were investigated by IR. The Alfery-Goldfingere differential equation was worked out by improved Eura Formula. The simplex optimization method and numeritical integration were combined and employed to set up a mathematic model, and a microcomputer program was worked out. The program was used to compute the reactiviy ratios of the monomers in DBTM—St—BA tercopolymer system according to the initial composition of monomers and the composition of the copolymer at any conversion.