Citation: ZHOU Zhiping, YAN Deyue. AN INVESTIGATION ON FOLD STRUCTURE IN POLYETHYLENE LAMELLA WITH DIAMOND LATTICE MODEL*[J]. Chinese Journal of Polymer Science, ;1998, 16(2): 133-141. shu

AN INVESTIGATION ON FOLD STRUCTURE IN POLYETHYLENE LAMELLA WITH DIAMOND LATTICE MODEL*

ZHOU Zhiping ,
YAN Deyue

Received Date: 21 March 1997

Based on perfect rotational isomeric state model of polyethylene chainwithout any torsional stretch or chain twisting, the separation distance between a zig-zagsegment and its re-entry ones in lamella has been investigated. The intervals were definedby a pair of quantum numbers (kx, ky) according to the formula: D=0.153/(31/2)((8kx2+16ly2)1/2)(nm)kx and ky are integers just as the lattice coordinates on the respective & and α- axes ofthe crystal lattices for polyethylene. The crystal lattices of polyethylene can be accessible by the re-entry stems,whether it is adjacent fold or not.Conformations,until 14-bond fold,of the fold part were investigated.The sequence TTGTTG'G'TTGGTTG possesses the lowest average conformation energy per bond for (110) fold,and TGTTG'G'TTTG' for (020) fold.TTTGGTGGTTGTG'etc.for(200) fold.
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