Skip to main content

Buna S or styrene butadiene rubber (SBR).

Buna S or styrene butadiene rubber (SBR).

  • In Buna S, Bu stands for butadiene and, Na stands for sodium and S stands for styrene.
  • Styrene and butadiene are the monomers of Buna-S rubber.
  • It is a co-polymer formed by the emulsion polymerisation of a mixture of butadiene and styrene in the presence of peroxide catalyst.
    This image contains formation of Buna S or styrene butadiene rubber from monomers styrene and butadiene.
    Buna S.
  • The rubber obtained is also called styrene butadiene rubber (SBR) or GR-S rubber.
  • It is a type of synthetic rubber.
  • It has good abrasion resistance.
  • It is very tough and a good substitute for natural rubber.
  •  It swells in organic solvents upto limited extend.
  • It gets oxidised in the presence of traces of ozone.
  • It is widely used in shoe soles and even in chewing gums.
  • It is used to make car tyres, floor tiles.
  • It is also used as adhesives.
    This image shows uses of Buna-S or SBR as adhesives,shoe soles, chewing gum,car tyres,floor tiles.
    Uses of Buna S.

Questions on Buna S

Q1) What is Buna S?
Ans) Buna S is a synthetic rubber. Styrene and butadiene are the monomers of Buna-S rubber.
Q2) What are the monomers of Buna-S?
Ans) Styrene and butadiene are the monomers of Buna-S.
Q3) How is Buna S prepared?
Ans) It is a copolymer formed by the emulsion polymerisation of a mixture of butadiene and styrene in the presence of peroxide catalyst.
Q4) Write some properties of Buna-S?
Ans) Some properties of Buna-S are given below;
1) It has good abrasion resistance.
2) It is a type of synthetic rubber.
3) It is very tough and a good substitute for natural rubber.
4) It gets oxidised in the presence of traces of ozone.
5) It swells in organic solvents upto limited extend.
Q5) Write some uses of Buna-S?
Ans) Some uses of Buna S are given below;
1) It is used widely in shoe soles and even in chewing gums.
2) It is used to make car tyres, floor tiles.
3) It is also used as adhesives.
Q6) Buna S is also known as?
Ans) Buna S is also known as styrene butadiene rubber (SBR) or GR-S rubber. Next


Comments

Post a Comment

Popular posts from this blog

Determination of molecular weight by osmotic pressure method

Determination of molecular weight by osmotic pressure method. Osmotic pressure method is also called membrane osmometry. This method is widely used to determine the number average molecular weight of polymers. This method is based on the phenomenon of osmosis. If a pure solvent is separated from a solution through a semipermeable membrane, due to concentration (chemical potential) difference between the solvent and solution, the solvent will flow into the solution through semipermeable membrane. The pressure applied on the solution to completely stop the flow of solvent into it through semipermeable membrane is called osmotic pressure. The theory of osmotic pressure also applies to a solution of polymers. Ordinary solution obeys Van't Hoff equation i.e π=cRT/M Where π is osmotic pressure, c  is concentration in mass per unit volume, R is gas constant, T is temperature and M is molar mass. The polymer solution are non ideal. Taking into account their deviation and us...
Post a Comment
Read more

Polylactic acid/PLA.

Polylactic acid/PLA. Polylactic acid is a biodegradable thermoplastic polymer . Polylactic acid is obtained from lactic acid monomer. Polylactic acid. Polylactic acid is stable to UV radiation. Polylactic acid has good resistance to moisture. Polylactic acid has good elasticity. Polylactic acid is an aliphatic polyester . It can be used as a food packaging polymer. Polylactic acid is suitable for textile fibre applications such as shirts, carpets, sportswear etc. Polylactic acid is used in implants and medical devices (screws, sutures etc). Polylactic acid is suitable for use in floor mats. Uses of Polylactic acid. Questions on Polylactic acid/PLA; Q1) What is Polylactic acid? Ans) Polylactic acid is a biodegradable thermoplastic polymer. Q2) What is the monomer of Polylactic acid? Ans) Polylactic acid is obtained from lactic acid monomer. Q3) Write some properties of Polylactic acid? Ans) Some properties of Polylactic acid are given below; ...
Post a Comment
Read more

Monomers.

Monomers. A monomer is a molecule that can be reacted together with other monomer molecules to form a larger polymer chain. Some monomers are given below with their polymers . Tetrafluoroethene ; Tetrafluoroethene is the monomer of Teflon . Teflon and its monomer. Acrylonitrile (vinyl cyanide); Acrylonitrile is the monomer of Polyacrylonitrile . Polyacrylonitrile and its monomer. Isoprene; Isoprene is the monomer of Polyisoprene (natural rubber). Polyisoprene and its monomer. Chloroprene; Chloroprene is the monomer of Neoprene . Neoprene and its monomer. Vinyl chloride; Vinyl chloride is the monomer of Poly(vinyl chloride) . Polyvinyl chloride and its monomer. Vinyl acetate; Vinyl acetate is the monomer of Poly(vinyl acetate). Poly(vinyl acetate) and its monomer. Propylene; Propylene is the monomer of Polypropylene . Polypropylene and its monomer. Styrene; Styrene is the monomer of Polystyrene . Polystyrene and i...
Post a Comment
Read more