聚甲基苯基硅烷的合成及非线性光学性能的研究

Thermal Analysis Used in the Distinguishment of Vegetable Oils

苯锂与甲基三氯硅烷反应制得了甲基苯基二氯硅烷．氮气保护下，在甲苯中与金属钾反应生成了聚甲基苯基硅烷．用元素分析，ＩＲ、ＵＶ、１Ｈ－ＮＭＲ和ＧＰＣ作了表征，并测得它的非线性谐波极化率Ｘ（３）的值为５．８×１０－１２ｅｓｕ．

On this paper,we have studied a rapid testing method in determining vegetable oils.The method is based on the sub-room temperature phase transition features.Using differential Scaning calorimetry (DSC) technique,the cooling curves of different vegetable oils and their first derivatives were recorded as the finger prints.