微波诱导马来酸酐固相接枝聚丙烯的制备及性能研究  

A study on the preparation and properties of microwave-induced solid-phase grafting of maleic anhydride onto polypropylene

作　　者：祝萌 彭文俊 张先明[1,2] ZHU Meng;PENG Wenjun;ZHANG Xianming(National Engineering Lab for Textile Fiber Materials and Processing Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China;Zhejiang Provincial Innovation Center of Advanced Textile Technology,Shaoxing 312030,China)

机构地区：[1]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,杭州310018 [2]浙江省现代纺织技术创新中心,浙江绍兴312030

出　　处：《浙江理工大学学报（自然科学版）》2024年第6期787-794,共8页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：浙江省“尖兵”研发攻关计划项目(2023C01095)。

摘　　要：聚丙烯(PP)作为通用塑料存在常规产品过剩与功能化产品严重短缺的问题,对PP进行接枝改性是实现其高性能化的重要方法。利用微波诱导固相接枝的方法,将极性单体马来酸酐(MAH)接枝在PP表面,通过添加第二单体苯乙烯(St)来提高接枝率,并对制备的马来酸酐接枝聚丙烯(PP-g-MAH)进行特性表征。结果表明:红外谱图显示PP成功接枝了MAH和St,添加St后最大接枝率可高达1.4%;改性后的接枝产物熔点几乎不变,而结晶温度有所提高,达到110.8℃;熔体流动速率均低于30g/10min,较PP(38.7105g/10min)下降明显,复数黏度更是从53.828Pa·s提升至419.46Pa·s;PP与水接触角从125.4°最多降至100°,PP-g-MAH的极性提高,亲水性能改善。该研究利用微波诱导PP固相接枝MAH,方法简单高效,在获得高接枝率的同时避免了分子量下降,改善了材料的性能,具有较为广阔的应用前景。Polypropylene(PP)as a general-purpose plastic faces a surplus of conventional products and a serious shortage of functionalized products,and grafting modification of PP is an important method to achieve its high performance.In this paper,the polar monomer maleic anhydride(MAH)was grafted on the surface of PP by using microwave-induced solid-phase grafting,and the grafting rate was improved by adding the second monomer styrene(St),and the prepared maleic anhydride-grafted polypropylene(PP-g-MAH)was characterized.As indicated by the results the infrared spectra showed that PP was successfully grafted with MAH and St,and the maximum grafting rate could be as high as 1.4%after the addition of St.The melting points of the modified grafted products were almost unchanged,while the crystallization temperatures were increased to 110.8℃;the melt flow rates were all lower than 30g/10min,which was a significant decrease compared with that of PP(38.7105g/10min),and the complex viscosities were even improved from 53.828Pa·s to 419.46Pa·s;the contact angle between PP and water decreased from 125.4°to 100°at most,and the polarity of PP-g-MAH was increased with improved hydrophilicity.This study utilized microwave-induced solid-phase grafting of MAH on PP in a simple and efficient way,avoiding the molecular weight decrease while obtaining a high grafting rate and improving the properties of the material,so it has a broader application prospect.

关 键 词：微波诱导 聚丙烯 马来酸酐 接枝率 黏度 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]