WorksheetsELASTOMERIC MATERIALS
Total questions: 10
Worksheet time: 2mins
Which of the following represents natural rubber chemically?
cis 1,4-polyisoprene
trans 1,4-polyisoprene
1,2 vinyl
3,4- polysiprene
Which component has the maximum composition in the Hevea rubber latex?
water
rubber hydrocarbon
proteins
sugars
which of the following statements is true about NR and IR
They have same MW
They have same chemical structure
They have same properties
They have same viscosity level
The polymers which possess the property of elastic is called rubber.
True
False
The most commonly used reagent for vulcanization of natural rubber is
peroxide
carbon black
sulphur
silica
SBR- stryrene butadiene rubber is
synthetic rubber
natural rubber
Rubber/elastomeric materials used in tyre production except
BR
EPDM
SBR
NR
Polymerization process using ziegler natta catalyst has a capabilities to produced 98% of cis 1,4 polyisoprene
True
False
The following statements is true about NR except
NR has higher tack strength than IR
NR has higher green strength than IR
NR has higher gum strength than IR
NR has great compatibility with SBR
The following statement is true about IR except
IR has low level of non polymer constituents as compared to NR
IR leads to variability in processing than NR
IR ease of processability than NR
IR has light colour makes it a better choice than NR
