| 摘要 |
PURPOSE:To obtain titled polymer composition, while retaining original merits, of improved transparency, melt tension, melt elasticity, etc., by incorporating a radical initiator in linear medium-to-low density polyethylene with specific density and melt index followed by melt kneading. CONSTITUTION:Titled polymer composition with a ratio (MI)2/(MI)1 of 0.05-0.9 can be obtained[where (MI)1 and (MI)2 are the melt indices of the original and improved polyethylene, respectively]by incorporating 0.0005-0.1wt% of a radical initiator in linear medium-to-low density polyethylene having a density of 0.90-0.94g/cm<3> followed by homogeneously melt kneading at a temperature between the melting point and thermal decomposition point of the original polyethylene. For said radical initiator, di-t-butyl peroxide is preferably used. |
