| 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. |
