Citation: . SHAPE OF POLYMER CHAINS ON A TETRAHEDRAL LATTICE*[J]. Chinese Journal of Polymer Science, ;2000, 18(5): 419-422. shu

SHAPE OF POLYMER CHAINS ON A TETRAHEDRAL LATTICE*

Received Date: 14 October 1999

The shape of unperturbed polymer chains was studied using the Monte Carlo technique on a tetrahedral lattice.The asphericity A, the ratios/and/ were calculated for different values of polymer chain length n,conformational energy ε (ε≥0) and temperature T. The asphericity A decreases with the increase of chain length and tends toreach its limiting value rapidly with the decrease of γ(γ=ε/kBT). For large n, A is about 0.525±0.005, the ratios22/12and 32>/L12 are about 2.7 and 12.0,respectively,and are almost independent of γ,but for short chains,they depend on γ.
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