聚丙烯接枝反应（毕业设计论文doc）.doc

摘要
研究了用固相接枝法对聚丙烯(PP)进行三单体AA/MAH/St接枝改性技术。由于聚丙烯是非极性聚合物,其亲水性、染色性、粘接性以及与其它极性聚合物和无机填料等的相容性都很差,很大程度上限制了聚丙烯的进一步推广应用。接枝改性是扩大聚丙烯应用面的一种简单而又行之有效的方法。本实验通过使用丙烯酸(AA)、马来酸酐(MAH)、苯乙烯(St)对接枝反应时间、反应温度、引发剂用量、界面剂用量、单体用量对接枝率的影响进行研究,通过测定不同条件下产品的接枝率,找出了影响接枝率的主要因素,对接枝工艺条件进行了优化。
实验对单体单接、双接、三接进行了研究,并且通过熔片、红外IR等方法对接枝产物进行了表征,实验结果分析表明三单体接枝产物在性能上要优于其他两种方法。
关键词:聚丙烯;固相接枝;改性;三单体
Abstract
The three monomers AA/MAH/St grafting technology by solid-grafting method of polypropylene (PP) was researched in this PP was non-polar, and its hydrophilicity, dyeability, adhesion were poor. Also, patibility with other polar polymers and anic fillers was weak. Therefore, these ings limited PP to further application largely. Appropriate polarity of the chain was introduced to molecular chain of PP, by using the reaction and the polarity of the chain not only improve their performance deficiencies but also add a new nature, so expanding the application by grafting Polypropylene is a simple and effective way. Acrylic acid (AA), maleic anhydride (MAH), styrene (St) were used in this experiment. By studying reaction time, temperature, initiator concentration, solvents and the amount of grafting monomer to measure grafting rate of product under the different conditions and identify the main factors of impaction of graft, the last optimizing graft process.
Single-access, dual-access and the three were studied in laboratory, by melting tablets, infrared IR and other methods to characterize products of grafting experimental results show that tri-monomers graft product is better than others in performance.
Key words: polypropylene;solid grafting; modification; tri-monomers
目录
第1章概述 1
1
2
3
8
固相聚丙烯接枝的应用 10
第2章实验部分 12
实验原料及仪器 12
实验步骤 13
14
第3章结果与讨论 15
单接时反应条件对接枝率的影响 15
双单体时反应条件对接枝率的影响 19
三单体时反应条件对接枝率的影响 22
红外分析 27
结论 29
参考文献 30
致谢 33
第1章概述

聚丙烯(PP)是目前产量及用量仅次于聚乙烯(PE)的第二大塑料品种,近年来全球PP生产能力已突破400