of low temperature initiator was divided into two equal portions the first aliquot of 1 1 di t amylperoxy cyclohexane was sufficient to create a concentration of 200 ppm in reactor system 110 which was maintained at 113 u00b0 c the same high temperature initiator was added to create a concentration of 50 ppm in the reactor system the second aliquot of low temperature initiator was added subsequently at a temperature of 107 u00b0 c surprisingly the final product had an increased m w of about 331 000 while the mwd was unchanged at 2 8 it is thought that this increase in mw resulted from the increased amounts of low temperature initiator that remained in the product stream after the polymer left reactor system 110 a similar experiment used higher levels of low temperature initiator the first aliquot was doubled to establish a concentration of 400 ppm in the reactor system while retaining the 50 ppm concentration of high temperature initiator the second aliquot of low temperature initiator sufficient to increase the concentration of low temperature initiator by 200 ppm in the product stream was subsequently added under these conditions the mw and mwd after the reactor system 110 ranged from about 379 000 to about 393 000 and 2 1 and 1 9 respectively however the m w of the final product decreased to between about 325 000 and about 322 000 while the mwd ranged from 3 0 to 3 1 the melt flow indices of these products ranged from 1 96 to 1 92 another set of experiments were performed using the low temperature initiator in.