文献类型：学位论文

中文题名：丁基橡胶的接枝改性与应用研究

英文题名：Research on Grafting Buty1 Rubber and Its Application

作者：熊磊[1];

机构：[1]华东理工大学;

导师：刘峰;华东理工大学

授予学位：硕士

语种：中文

中文关键词：丁基橡胶;;马来酸酐;;接枝;;溶剂热;;氯含量

外文关键词：butyl rubber;maleic anhydride;graft;solvothermal;chlorine content

摘要：丁基橡胶(butyl rubber简称ⅡR)是异丁烯与少量异戊二烯的共聚产物,具有良好的耐氧化、耐臭氧、耐热老化及气密性,因而广泛用于制造内胎、电线电缆、化工设备衬里等。由于丁基橡胶分子链绝大部分是惰性异丁烯链段,缺少极性基团,因而与其它极性聚合物的相容性较差,其应用范围也大大受到了限制,因而丁基橡胶的改性显得十分必要。 本文主要研究了溶剂热法制备丁基橡胶接枝马来酸酐、丁基橡胶氯化原位接枝马来酸酐,此外,还探讨了接枝共聚物的粘接性能。 溶剂热法是近年来新兴的一种制备接枝共聚物的方法。具有溶剂量少、无污染、接枝率高等优点。本文通过溶剂热法成功合成了丁基橡胶与马来酸酐的接枝共聚物,并详细的讨论了反应温度、反应时间、单体用量、引发剂用量等对产物接枝率和接枝效率的影响。 考虑到传统的氯化和接枝都是分部进行的,生产效率较低。本文以磺酰氯热分解产生氯自由基为引发剂,使丁基橡胶在氯化的同时,与体系中的马来酸酐进行接枝共聚,从而制得氯化接枝共聚物,即将氯化和接枝两个过程合并为一个过程,简化了合成步骤。 通过傅里叶红外光谱(FT-IR)对上述改性产物进行了表征,证实了其结构的存在,采用化学滴定法测定了反应产物的接枝率和接枝效率,同时利用氧弹燃烧法对丁基橡胶氯含量进行了测定。 在粘接应用中,详细的研究了产物的接枝率对剪切强度的影响,以及二胺固化后,产物剪切强度的变化。
Butyl rubber /(IIR/) is a copolymer of isobutene and a small amount of isoprene. Butyl rubber has excellent resistance to oxidation, ozone, aging and very good air tightness, so it is widely used as inner tube, Wire, Cable, Chemical Equipment lining and so on. The isobutene chain segment which is the most part of molecular chain of butyl rubber is inertia and lack of polar groups, So there is poor compatibility between IIR and other polar polymers, such as polyester, polylactic acid, polyvinyl Acetate, and its application were limited into a great extent. Therefore, it is extremely necessary to study the modified IIR. This paper mainly studied on solvothermal preparation of maleic anhydride grafted onto Butyl rubber, Butyl rubber grafted maleic anhydride via in-situ chlorinating grafting copolymerization, also, the adhesion property of the graft copolymer was studied. A novel method, solvothermal method, was employed to synthesize grafting copolymers. It's need less solvent, favorable for the environment and high grafting yield. In this paper, it was successfully synthesized the graft copolymer IIR-g-MAH through solvothermal method. The effects of various factors such as the reactive temperature and time, concentration of initiator and monomer on the degree ofgrafting was studied in detail. The traditional method for preparing chlorinate-graft copolymer needs two step, that is to say, chlorinate and graft were two independent steps, So, the productivity is inefficient. In this paper, radical reaction was initiated by chlorine radical from thermal decomposition of sulfuryl chloride. As a result, grafting copolymerization happened while chlorinating reaction of backbone IIR was being carried out. It means that the chlorination and graft copolymerization of the polymer happed at the same time, So it is very efficient. FT-IR results confirm the structure. The grafting ratio and grafting efficiency of IIR-g-MAH was determined by chemical titration. Chlorine content of modified polymer is determined by oxygen bomb combustin. At bonding applications, it was studied the degree of grafting on shearing strength and the changes in shearing strength after diamine curing.