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

Abstract

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

References

[1]王盼盼.高接枝率的马来酸酐接枝聚丙烯制备和表征[D]. 青岛科技大学，2019:6-15. [2]Panpan Wang.Preparation and characterization of maleic anhydride grafted polypropylene with a high grafting rate[D].Qingdao University of Science & Technology, 2019:6-15. [3]MU?OZ P A R, BETTINI S H P.Montmorillonite as support for peroxide in the melt grafting of maleic anhydride onto polypropylene[J].Journal of Applied Polymer Science, 2016, 133(42):1-9 [4] Tariq A, Ahmad N M, Abbas M A, et al.Reactive Extrusion of Maleic-Anhydride-Grafted Polypropylene by Torque Rheometer and Its Application as Compatibilizer[J]. Polymers, 2021, 13, 495:1-17.[J].Polymers, 2021, 13(495):1-17 [5]Ying Li, Xu-Ming Xie, Bao-Hua Guo.Study on styrene-assisted melt free-radical grafting of maleic anhydride onto polypropylene[J].Polymer, 2001, 42(8):3419-3425 [6]袁文博, 刘莉雪, 杨秀珍, 等.接枝率测定方法的建立与分析[J].塑料工业, 2021, 49(11):103-106 [7]Wenbo Yuan, Lixue Liu, Xiuzhen Yang, et al.Establishment and analysis of grafting rate determination method for PP-g-MAH[J].China Plastics Industry, 2021, 49(11):103-106 [8]谢海生, 兰修才, 李谦, 等.低挥发高接枝率马来酸酐接枝聚丙烯的制备及其在增强聚丙烯材料中的应用[J].塑料工业, 2022, 50(10):149-153 [9]Haisheng Xie, Xiucai Lan, Qian Li, et al.Preparation of maleic anhydride grafted polypropylene with low volatility and high grafting rate and its application in reinforced polypropylene[J].China Plastics Industry, 2022, 50(10):149-153 [10]梁全才, 成建强, 邱桂学.聚合物接枝改性及接枝率的表征[J].塑料助剂, 2009, (6):15-18 [11]Quancai Liang, Jianqiang Cheng, Guixue Qiu.Grafting modification of polymers and characterization of their graft ratio[J].Plastics Additives, 2009, (6):15-18 [12]张立峰, 郭宝华, 张增民.马来酸酐接枝聚丙烯的固相合成以及酸酐含量的测定[J].清华大学学报自然科学版, 2001, 41(10):5-8 [13]Lifeng Zhang, Baohua Guo, Zengmin Zhang.Synthesis of PP-g-MAH via solid grafting with a quantitative express method for analyzing MAH content[J].Journal of Tsinghua University, 2001, 41(10):5-8 [14]王学敏, 刘大壮.酸碱滴定法测定马来酸酐接枝氯化聚丙烯的接枝率[J].工程塑料应用, 2009, 37(1):52-55 [15]Xuemin Wang, Dazhuang Liu.Study on the grafting yield of maleic anhydride grafted chlorinated polypropylene by neutralization titration[J].Engineering Plastics Application, 2009, 37(1):52-55 [16]Li Y, Xie X M, Guo B H.Study on styrene-assisted melt free-radical grafting of maleic anhydride onto polypropylene[J].Polymer, 2001, 42(8):3419-3425 [17]高永芝, 张建斌, 刘建伟.酸碱滴定法测定马来酸酐接枝聚丙烯中的酸酐含量[J].工程塑料应用, 2005, 33(5):46-48 [18]Yongzhi Gao, Jianbin Zhang, Jianwei Liu.Study on the acid anhydride content in maleic anhydride graft polypropylene by neutralization titration[J].Engineering Plastics Application, 2005, 33(5):46-48