Production Of Polyethylene

Question 0

LDPE polymerisation process

Answer 0

Peroxide initiator splits, forming free RADICALS, which allow the INITIATION of ethylene monomers.

Question 1

LDPE requirements

Answer 1

1,000-3,000 atmospheric pressures.
High temperature 300°C.
Initiator - Organic peroxide.

Question 2

Initiator perixide

Answer 2

Is not a catalyst as it gets incorporated into polymer.

Question 3

Branching of LDPE polymer formed:

Answer 3

Chain branching.

Cannot be compact or be packed in orderly way.

Question 4

Molecular weight of molecules formed:

Answer 4

Up to 1,000,000 g/mol.

Question 5

Recycling symbol:

Answer 5

/ 04 \
\ PE-LD /

Question 6

HDPE process name:

Answer 6

Zeigler-Natta process.

Question 7

HDPE requirements:

Answer 7

Pressure of a few (3) atmospheres.
60°C
A catalyst.

Question 8

HDPE polymerisation process

Answer 8

Occurs on surface of catalyst.

Question 9

Branching of HDPE polymer formed

Answer 9

UNBRANCHED PE molecules that are able to pack closely in an orderly fashion.

Question 10

Molecular weight of HDPE molecules formed:

Answer 10

Up to 3,000,000 g/mol

Question 11

HD-PE recycling symbol

Answer 11

02 \
PE-HD \