Relationship Between Comonomer Content and Polyethylene Properties
Structure of polyethylene is the key factor affecting the properties of polyethylene.For high-density and linear low-density polyethylene,the choice of different comonomers and their content is crucial in determining the degree of branching in the polymer chains.In the formation of long-chain branching(LCB),an increase in comonomer content often leads to a decrease in the degree of LCB.This study conducted a comprehensive analysis of high-density polyethylene samples,namely D6095H,L6095-1,and L6095-2,produced by three domestic manufacturers.Various fundamental properties such as comonomer content,molecular weight distribution,thermal performance,mechanical properties,and microstructure were tested with respect to different comonomer contents.The results show that D6095H,with a slightly higher comonomer content,exhibits higher melt flow rate and branching degree compared to L6095-1 and L6095-2,but lower crystallinity.D6095H also has a broader molecular weight distribution,higher tensile stress than L6095-1 and L6095-2,while L6095-1 and L6095-2 exhibit higher impact strength.
ComonomerHigh density polyethyleneMechanical property
国家科技期刊平台
NSTL
万方数据
维普
