Polyethylene

Question 1

Polarity of Polymer

Answer 1

Hydrophobic

Question 2

Low-Density Polyethylene (LDPE)

Answer 2

Low Degree of Crystallinity

Question 3

High-Density Polyethylene (HDPE)

Answer 3

Higher Degree of Crystallinity

Question 4

Ultra High Molecular Weight Polyethylene (UHMWPE)

Answer 4

Molar mass greater than x10^6

Question 5

Which type of PE is readily moldable

Answer 5

LDPE, HDPE

Question 6

Which type of PE is used as a bearing surface?

Answer 6

UHMWPE
used in the hip socket of the hip joint
ONLY USED IN ORTHOPEDICS

Question 7

Negatives of UHMWPE

Answer 7

Particles are toxic
Cause bone necrosis and osteolytic lesions leading to failure of hip joints

Question 8

Structure of PE

Answer 8

LD: Branched
HD: Linear

Question 9

Crystallinity of PE

Answer 9

LD: Less Crystalline
HD: Highly Crystalline

Question 10

Density of PE

Answer 10

LD: Lower due to branching
HD: Higher due to crystallinity

Question 11

Strength of PE

Answer 11

LD: Weaker
HD: Stronger

Question 12

Melting Point of PE

Answer 12

LD: Lower
HD: Higher

Question 13

Transparency of PE

Answer 13

LD: More Transparent
HD: Less Transparent

Question 14

Chemical Properties of PE

Answer 14

Both Chemically Intert
UHMWPE is TOXIC

Question 15

Applications of PE

Answer 15

LD: Plastic Bag, Cling Raps
HD: Milk Carton, Detergent Containers