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Physical Properties of Polymers Muhammad Zafar Iqbal Lect-7 01-04-2008
Today ,[object Object],[object Object],[object Object],[object Object]
The Elasticity of Polymers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Kinetic Theory of High Elasticity ,[object Object],[object Object],[object Object],[object Object],If C 1  and C 2  are fixed, then C 3  can have three possible Positions on the circle and C 4   has 3 2 . Similarly if only C 1  is fixed then C 2  will have three possible  Positions and C 3  will have 3 2  and C 4  will 3 3 Each separate position of the chain can be explained by a set of Cartesian coordinates or by polar coordinates with “r” as the characteric distance from the centre.
Configuration of a single Chain ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
C-chain and Random Flight Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Graphical Representation If “r” is the distance between the ends and a single direction in space then  p(x,y,z) is the probability of a length “r “in a single direction i.e. p(r).  We need only r-values not the p(r) but  P(r)  the probability in any direction.
[object Object],[object Object],[object Object],[object Object],Where r 2 = x 2  + y 2  + z 2 dx.dy.dz = 4.pi. R 2 . dr
[object Object],[object Object],[object Object]

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Ppp1 Rubber Elasticity

  • 1. Physical Properties of Polymers Muhammad Zafar Iqbal Lect-7 01-04-2008
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10. Graphical Representation If “r” is the distance between the ends and a single direction in space then p(x,y,z) is the probability of a length “r “in a single direction i.e. p(r). We need only r-values not the p(r) but P(r) the probability in any direction.
  • 11.
  • 12.