Polyethylene and Its Chlorinated Polyethylene

A polyethylene having a density of 0.945 g/cm3 or more when measured in accordance with ASTM D-1505,

• wherein a fraction of an area representing a high molecular weight content of log Mw>6.0 is 4 to 12%,
• a fraction of an area representing a medium molecular weight content of 4.5<log Mw<5.0 is 35 to 50%, and
• a fraction of an area representing a low molecular weight content of log Mw<4.0 is 10% or less,
• relative to a total area of a molecular weight distribution curve drawn with a log value of weight average molecular weight as the x axis and a molecular weight distribution with respect to the log value as the y axis using gel permeation chromatography, and
• an entanglement molecular weight (Me) of the following Equation 1 is 27,000 to 52,000 g/mol:
• Me=(ρRT)/GN0 [Equation 1]
• wherein Equation 1,
• ρ is a density (kg/m3) of polyethylene measured in accordance with ASTM D-1505×0.8,
• R is a gas constant of polyethylene of 8.314 Pa·m3/mol·K,
• T is an absolute temperature of the measured temperature, and
• GN0 is a plateau modulus of polyethylene, which is a storage modulus when a loss modulus has a minimum value in a region where the storage modulus is greater than the loss modulus, wherein the storage modulus and loss modulus are measured while changing an angular frequency to 0.05 to 500 rad/s under conditions of 190° C. and 0.5% strain using a rotary rheometer.