核磁共振法测定聚丙烯粉料二甲苯可溶物的影响因素及对策研究  

Study on the influencing factors and countermeasures for the determination of xylene soluble matter in polypropylene powder by nuclear magnetic resonance method

作　　者：代刚 陈举 王建平 李章 严凌 Dai Gang;Chen Ju;Wang Jianping;Li Zhang;Yan Ling(Yunnan Yuntianhua Petrochemical Co.,Ltd.,Kunming 650309,China)

机构地区：[1]云南云天化石化有限公司,云南昆明650309

出　　处：《云南化工》2023年第S01期14-17,共4页Yunnan Chemical Technology

摘　　要：对核磁共振法测定聚丙烯粉料二甲苯可溶物的稳定性进行了实验研究,找出了影响测定结果的主要因素,建立了包含新样品预处理方式和试验条件的改进方法,实现了在聚丙烯装置单一牌号生产、不同牌号转产等多重工况下中间产品聚丙烯粉料中二甲苯可溶物的准确快速测定。改进后的测定方法测定时间由5 h缩短到2 h,测定结果采用GB/T24282-2009化学萃取法进行验证,准确度和精密度符合要求,已在云南云天化石化有限公司15万吨聚丙烯装置4个种类12个牌号生产中长期应用。Conduct experimental research on the stability of xylene soluble matter in polypropylene powder determined by nuclear magnetic resonance method,identify the main factors affecting the determination results,establish an improved method including new sample pretreatment method and experimental conditions,and achieve accurate and rapid determination of xylene soluble matter in intermediate product polypropylene powder under multiple operating conditions such as single brand production and different brand conversion in polypropylene equipment.The improved measurement method shortened the measurement time from 5 hours to 2 hours.The results were verified using the GB/T24282-2009 chemical extraction method,and the accuracy and precision met the requirements.It has been applied for a long time in the production of 4 types and 12 brands of polypropylene at Yunnan Yuntianhua Petrochemical Co.,Ltd.'s 150000 ton polypropylene plant.

关 键 词：聚丙烯粉料 二甲苯可溶物 核磁共振 样品预处理 

分 类 号：O65[理学—分析化学]