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End to end distance of a polymer chain is given as
1 + cos(180 - t ) 1 + <cos %>
<r^2> = nl^2 ------------------- X ------------------
1 - cos(180 - t ) 1 - <cos %>
<cos%> = origin of temperature dependence
For polyethylene, degree of polymerication = 10000, bond angle = 110 degree.
Half of the conformation are T and the other half G(or G').
1. Calculate the <r^2>
2. What happens to <cos%> as temperature increase?
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