| abstract |
A suitable composition for pipes, which comprises the reaction product of: (a) a first composition comprising a BPM polyethylene component and an APM polyethylene component and (b) a second composition comprising a coupling amount of at less a polysulfonyl azide, the coupling amount being at least 0.0025 weight percent, based on the weight of the total polymer and in which the first composition has substantially a single peak in an LTD curve, in which the composition has a PENT value greater than 1,000 hours at 80 ° C and an applied voltage of 2.4 MPa (ASTM D-1473-97), in which the APM component has a melt flow rate I2 (190 ° C, 2.16 kg in weight, ASTM D-1238-03) from 0.001 to 1.0 g / 10 min, in which the BPM component has a melt flow I2 of 40 to |