聚甲基丙烯酸三乙基锡酯立构等规度与其聚合温度间的关系

RELATIONSHIP BETWEEN POLYMERIZATION TEMPERATURE AND TACTICITY OF POLYTRIETHYLTIN METHACRYLATE

本文研究了聚甲基丙烯酸三乙基锡酯（ＴＥＴＭ）与聚合温度温度间的依赖性，发现随着聚合温度的提高，ＰＴＥＴＭ间同含量降低，而全同、无规含量则增加，同时还计算了活化焓差、活化熵差，其值为ΔΔＨ≠＝－４．５９ＫＪ／ｍｏｌ，ΔΔＳ≠＝－５．２Ｊ／ｍｏｌＫ。

We have done research work on the relationship between the tacticity of polytriethyltin methacrylate and polymeriztion temperature and found that the syndiotactic traid decreases and the isotactic and atactic traid increase while increasing temperature. The differences of the activation enthalpies and entropies between syndiotactioc and isotactic cases have been caculated. The values are: ΔΔΗ ≠=-4.5 KJ/mol \ \ ΔΔS ≠=-5.2 J/mol·K The influent factors on the tacticity of free radical polymeried polymers have also been discussed.