竟聚率值、烷基基团和系列有机锡单体、MMA共聚活性的相关性

THE DEPENDENCE OF REACTIVITY RATIO AND ALKYL RADICAL ON THE COPOLYMERIZATION OF MMA AND A SERIES OF ORGANOTIN MONOMERS

本文采用ＦＴＩＲ技术测定了共聚物的组成，用Ｆｉｎｅｍａｎ—Ｒｏｓｓ法、最小二乘曲线拟合法（ＮＬＳ法）、置信区间法计算了甲基丙烯酸三甲基锡酯（ＴＭＴＭ）、三乙基锡酯（ＴＥＴＭ），三丁基锡酯（ＴＢＴＭ）和三苯基锡酯（ＴＰＴＭ）与甲基丙烯酸甲酯（ＭＭＡ）的竟聚率，ＮＬＳ法的数值分别为：ｒ１＝１．０７，ｒ２＝０．６３（ＴＭＴＭ／ＭＭＡ）；０．８７，０．６２（ＴＥＴＭ／ＭＭＡ）；０．６２，０．５８（ＴＢＴＭ／ＭＭＡ）；０．６８，０．６０（ＴＰＴＭ／ＭＭＡ），并计算了各单体的Ｑ和ｅ值，讨论了不同取代基结构对其共聚合相对活性的影响．

n the present work,The reactivity ratios of trimethyltin(TMTM),triethyltin (TETM),tributyltin (TBTM )and triphenyltin (TPTM)methacrylates with methyl methacrylate (MMA)have been determined.The experimental determination of the copolymer compositions formed from several different comonomer feed compositions involves the technique of FTIR spetroscopy. The Fine-Ross method, the nonlinear least -squares method and believable propability area method have been used to caculate the reactivity ratios,r1 and r2 resulted from the nonlinear least squares method are 1.07/0.63(TMTM/MMA);0.87/0. 62 (TETM/MMA);0. 62/0.58 (TBTM/MMA);0.68/0. 60(TPTM/MMA ),respectively.Q and e values of these trialkyltin methacrylate monomers have also been estimated.The realtive reactivities of the organotin monomers have been compared and the effect of the different substiuent on their copolymerization activity has been discussed.