Abstract :
Polyethylene has become the most important polyolefi n plastic with excellent mechanical properties, processing properties and chemical resistance. It is used in the production of film, packaging and pipe. However, the nonpolar property and low rigidity of polyethylene limits its application in certain fi elds. The new progress of chemical modification, physical modifi cation and modifi cation of polyethylene were reviewed. Chemical modifi cation includes graft modification, copolymerization modification, crosslinking modification, chlorination, chlorosulfonation modification and plasma modification. There are different methods of polyethylene production which include high pressure polyethylene, medium pressure polyethylene and low pressure polyethylene. All three methods have their own benefits and shortcomings which coexist in the industry.
Keyword :
polyethylene high pressure production process