View Full Document

Kinematics of Polymer Chain



View the full content.
View Full Document
View Full Document

4 views

Unformatted text preview:

6316 Macromolecules 1992 25 6315 6321 Kinematics of Polymer Chains with Freely Rotating Bonds in a Restrictive Environment 2 Conformational and Orientational Correlations I Bahar and B Erman Polymer Research Center and School of Engineering Bogazici University and TUBZTAK Advanced Polymeric Materials Research Center Bebek 80815 Istanbul Turkey L Monnerie Ecole Superieure de Physique et Chimie Indwtrielle PCSM 10 rue Vauquelin Ceder 05 Paris 75231 France Received February 13 1992 Revised Manuscript Received June 17 1992 ABSTRACT The mathematical formulation developed in the preceding paper is used to study the kinematics of polymer chains in a restrictive environment Conformational and orientational correlations along the chain are analyzed Calculations are performed by generating an initial configuration for a 25 bond freely rotating chain changing the dihedral angle for the middle bond and studying the resulting changes in all of the degrees of freedom internal and external Results from Monte Carlo chains generated in this manner are averaged over a sufficient number of initial configurations The following conclusions are reached i A change in the dihedral angle of a given internal bond in small steps up to f120 is accommodated by the spatial readjustments of about three neighboring bonds on each of ita sides Spatial configurations of more distant neighbors are negligibly affected Thus the conformational correlation length along the freely rotating chain extends over 6 8 bonds ii In general the rotational motion of a given bond is accompanied by counterrotations of ita first neighbors iii The response of second neighbors is lightly stronger than that of the first neighbors on the average though occurring randomly in the positive or negative sense iv The kinematics of motion imply the potential occurrence of transitions of the form g tt ttg and ttt g tgr in agreement with previous predictions of Helfand v Bonds in the close neighborhood of the rotating bond exhibit



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Kinematics of Polymer Chain and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Kinematics of Polymer Chain and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?