Questions regarding the effect of gas-phase fluidized-bed ethylene-butylene copolymerization on physical properties
Thread Content
The copolymerization of ethylene with comonomers such as butylene has a significant impact on the physical properties of the polymer. As the amount of comonomer added increases, the bending strength, tensile strength, and yield strength of the polymer all decrease. Can anyone explain why this is the case? Thank you!
This post was last edited by jsn on 2010-3-5 at 16:12. What you’re referring to is actually a production method for linear low-density polyethylene, which involves adding copolymers such as 1-butene and 1-hexene during the polymerization of ethylene; these copolymers introduce appropriate short side chains into the main chain of the polymer, thereby reducing the crystallinity of the polyethylene and its density as well. That is the reason for the problem you mentioned. If the ethylene segments are short enough, it becomes an amorphous elastomer. If the second group contains a polar group, it can improve the adhesion properties of the copolymer. Low-density polyethylene is generally used for processing films.