Skip to main content

Neoprene rubber

Neoprene rubber.

  • Neoprene is also known as polychloroprene or pc rubber.
  • Neoprene is a synthetic rubber.
  • It is prepared by free radical polymerisation of chloroprene (2-chlorobuta-1,3-diene).
    Polychloroprene
    Neoprene.
  • It has strong resistance to oils, chemicals, UV light, ozone.
  • It has good chemical stability.
  • It is flexible over a wide temperature range.
  • Neoprene is waterproof.
  • Neoprene is used to make laptop sleeves.
  • Neoprene is used to make wetsuits,drysuits and waders.
  • Neoprene is widely used in the manufacture of safety gloves and other safety equipment.
  • Neoprene is also used in some sports shoes to provide extra padding for insoles.
  • Neoprene is also used to make orthopaedic braces (wrist,knee,etc).
    Application of neoprene
    Uses of neoprene.

Questions on Neoprene

Q1) What is neoprene ?
Ans) Neoprene is a synthetic rubber. Neoprene is also known as polychloroprene or pc rubber.
Q2) What is the monomer of neoprene?
Ans) Chloroprene is the monomer of neoprene.
Q3) How is neoprene prepared?
Ans) Neoprene is prepared by free radical polymerisation of chloroprene.
Q4) Write some properties of Neoprene?
Ans) Some properties of neoprene are given below;
1) It has strong resistance to oils, chemicals, UV light, ozone.
2) It has good chemical stability.
3) It is flexible over a wide temperature range.
4) Neoprene is waterproof.
Q5) Write some uses of Neoprene?
Ans) Some uses of neoprene are given below;
1) Neoprene is used to make laptop sleeves.
2)Neoprene is used to make wetsuits, drysuits and waders.
3) Neoprene is widely used in the manufacture of safety gloves and other safety equipment.
4) Neoprene is also used in some sports shoes to provide extra padding for insoles.
5) Neoprene is also used to make orthopaedic braces (wrist,knee,etc).
Q6) Is neoprene an addition polymer or a condensation polymer?
Ans) Neoprene is not a condensation polymer. It is an addition polymer. Neoprene is made from monomer chloroprene (2-chlorobuta-1,3-diene).Next

Comments

Popular posts from this blog

Determination of molecular weight of polymers by viscosity method.

Determination of molecular weight of polymers by viscosity method. It is a simple method for determining the molecular weight of polymers. Addition of polymers in the solvent increases the viscosity of the solvent, due to introduction of inhomogeneities by the polymers. If η₀ is the viscosity of the solvent and η is the viscosity of the solution at the same temperature, then the relative viscosity is given by Relative viscosity. Specific viscosity:  It is defined as the relative increase in viscosity and is given as Specific viscosity. Reduced viscosity: It is defined as the relative increase in viscosity per unit concentration (C) of polymer and is given as Reduced viscosity. Intrinsic viscosity: The reduced viscosity is dependent on concentration (C). If a graph is plotted between  reduced viscosity vs concentration then the extraplotation value when C=0 is called intrinsic viscosity. Intrinsic viscosity. Graph of reduced viscosity vs concentr

Determination of molecular weight by Light scattering method.

Determination of molecular weight by Light scattering method. Due to big size macromolecules in solution, turbidity is produced. The light rays get scattered, when pass through macromolecule solution due to turbidity. The turbidity T is given by Where I₀ is the intensity of incident light. Iₜ is the intensity of transmitted light after passing through a solution of length l.        In case of proteins or higher polymers the turbidity is small and is determine from the intensity of light scattered at 90° to the beam. This can be done by using a simple photometer as shown in figure below. Turbidity increase with increase in concentration as well as molecular weight. The Turbidity is related to molecular weight by the equation given by Debye. Hc/T=1/M+2Bc Where B is second virial coefficient and H is a constant. If we plot a graph between Hc/T vs c we get a straight line with intercept 1/M. Thus This curve was plotted by Zimm, so is called Zimm's Curve. Thus the c

Kinetics of copolymerisation and Composition of copolymer.

Kinetics of copolymerisation and Composition of copolymer. We must know that Where r₁ and r₂ are the reactivity ratio's for the given pair of monomers. Where the above equation is called Copolymerisation equation and it gives the copolymerisation composition without using radical concentration. Types of copolymerisation ( kinetics significance) Let us take the reactivity ratio's product of monomers i.e Product of reactivity ratios. Depending on whether this product is less, greater or equal to unity copolymers are divided into three types. 1)Ideal copolymerisation Here the product of reactivity ratios is equal to unity, i.e r₁r₂=1 2) Alternating copolymerisation Here the product of reactivity ratios is equal to zero, i.e r₁r₂=0. 3)Block copolymerisation Here the product of reactivity ratios is greater than 1, i.e r₁r₂>1.