酸碱滴定法测定马来酸酐接枝聚丙烯接枝率精度的影响因素研究  

Study on influence factors for measurement precision of grafting rate of maleic anhydride-grafted polypropylene through neutralization titration

作　　者：柯俊沐 KE Junmu(Fujian Polytechnic Normal University,Fuqing 350301,China;Quangang Petrochemical Research Institute of Fujian Normal University,Quanzhou 362801,China)

机构地区：[1]福建技术师范学院,福建福清350301 [2]福建师范大学泉港石化研究院,福建泉州362801

出　　处：《中国塑料》2023年第6期16-20,共5页China Plastics

基　　金：2021年度福建省中青年教师教育科研项目(科技类)(JAT210374);福建省科技厅区域发展项目(2020H4005);企业横向项目(HX2022023);2022年度福建省中青年教师教育科研项目(科技类)(JAT220254)。

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0.5000 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%。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 0.5000 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.

关 键 词：马来酸酐接枝聚丙烯 酸碱滴定 接枝率 精度 

分 类 号：TQ317.2[化学工程—高聚物工业]