酸碱滴定法测定马来酸酐接枝聚丙烯的接枝率精度的影响因素研究

›› 2023, Vol. 37 ›› Issue (6): 16-20.

酸碱滴定法测定马来酸酐接枝聚丙烯的接枝率精度的影响因素研究

柯俊沐¹,²

1. 福建技术师范学院
2. 福建师范大学泉港石化研究院

收稿日期:2023-02-13 修回日期:2023-03-02 出版日期:2023-06-26 发布日期:2023-06-26

Study on the Influencing Factors of Precision of Grafting Yield in Maleic Anhydride onto Polypropylene by Neutralization Titration

Received:2023-02-13 Revised:2023-03-02 Online:2023-06-26 Published:2023-06-26

摘要/Abstract

摘要： 研究了利用酸碱中和滴定法测定马来酸酐接枝聚丙烯（PP?g?MAH）中酸酐含量的测试方法，分析了取样量、二甲苯用量、溶解温度、溶解时间、滴定温度等因素对接枝率精度的影响，进而得到优化的试验方法。结果表明，当取样量为0.500 0 g、二甲苯用量为100 mL、溶解温度为110 ℃、溶解时间为5 h、滴定温度为110 ℃时，接枝率的测试结果最理性，接枝率为1 %，数据波动最小，测定最稳定，平行实验标准方差为0.83 %。

关键词: 马来酸酐接枝聚丙烯, 酸碱滴定, 接枝率, 精度

Abstract: The method for determining the content of maleic anhydride （MAH） in MAH-grafted polypropylene was studied through neutralization titration. The influence factors such as the quantity of refined sample， the addition amount of xylene， dissolution temperature， dissolution time， and titration temperature were analyzed， and an optimized experimental method was obtained. The experimental results indicated that the optimal detection results were achieved when the quantity of the refined sample was 0.500 0 g， the amount of xylene was 100 mL， the dissolution temperature was 110 ℃， the dissolution time was 5 h， and the titration temperature was 110 ℃. Under this condition， a grafting rate of 1 wt% was determined with the smallest data fluctuation at a standard deviation of parallel experiments of 0.83 %， indicating the most stable determination.

Key words: maleic anhydride grafted polypropylene, neutralization titration, grafting yield, precision

柯俊沐. 酸碱滴定法测定马来酸酐接枝聚丙烯的接枝率精度的影响因素研究[J]. , 2023, 37(6): 16-20.

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