Which of the following statements is/are not correct ?
A. High pressure polymerisation of ethylene in the presence of a free radical initiator gives highly branched polymer
B. The density of high pressure polymerised ethylene is more than that of low pressure polymerised ethylene
C. Polymerisation of ethylene at low temperature and pressure results into a linear polymer with much less branched chains
D. Low pressure polymerisation of ethylene can be done at a lower temperature using a Ziegler catalyst
