Question

BUNA-S

Answer 1

BUNA-S (or STYRENE RUBBER)
• PREPARATION: 
This is the most important type of synthetic rubber which is produced by copolymerization of butadiene ,CH₂ = CH- CH = CH₂ (75% by weight) and styrene ,C₆ H₅ CH = CH₂ (25% by weight). 

• PROPERTIES
1.Styrene rubber resembles natural rubber in processing characteristics as well as quality of finished products.
2.1t posses high abrasion-resistance, high load-bearing capacity and resilience
3.1t swells in oils and solvents.
• USES
1.Mainly used for the manufacture of motor tyres.
2. Other uses of this elastomer are floor tiles, shoe soles, gaskets, foot-wear components, wire and cable insulations, carpet backing, adhesive, tank-lining, etc.