毛细管气相色谱研究α-烯烃共聚物

Study on α-Olefin Copolymers by Capillary Gas- Liquid Chromato9raphy

在长链α-烯烃共聚物研究中,需要测定共聚物分子中不同长度支链的比例及共聚竞聚率,然而,碳数相近的α-烯烃的结构和性质相似,因此难以用一般物理和化学方法测定。本文将毛细管气相色谱应用于α-烯烃共聚物研究,通过测定聚合反应前、后反应液组成的变化,来计算各单体的消耗量,得到共聚物的组成,按Fineman Ross公式计算得共聚单体的竞聚率。 实验部分 (一)试剂 庚烯-1、辛烯-1、癸烯-1、

In this paper a method using capillary gasy-liquid chromatography to study a-olefin copoly-mers is described. The compositions of monomers before and after the copolymerization were determind. Reactivity ratios of the monomers and compositions of copolymer were estimated from the data of olefin consumption in the reaction according to the definite formulas. Two gas chromatograms of mixed α-olefins(C9-C14)were obtained on 30m capillary column coated with SE-54 and PEG-20M respectively. Normal para-ffins_were used as internal standards. The difference between the results from this method and those from the copolymer weighing method was within 4%.