中文摘要：

Conformational elasticity theory recently developed has been used to explore the internal energy contribution to the elastic force fe/f as a function of strain for polyethylene (PE). Calculated fe/f values are in good agreement with those obtained experimentally. Results show that the behavior of fe/f is mainly contributed from intramolecular interaction of chemical structure, and that the internal energy contribution is strain-dependent.

英文摘要：

Conformational elasticity theory recently developed has been used to explore the internal energy contribution to the elastic force f e/f as a function of strain for polyethylene (PE). Calculated f e/f values are in good agreement with those obtained experimentally. Results show that the behavior of f e/f is mainly contributed from intramolecular interaction of chemical structure, and that the internal energy contribution is strain-dependent.