【摘要】 采用旋转异构态模型，计算受约于无限长圆柱体的聚亚甲基链的配分函数．发现受约聚亚甲基链的配分函数可以写成ｌｎＺ＝ａＮ＋ｂ，其中，Ｎ是键的数目，ａ和ｂ与温度Ｔ、无限长圆柱体的直径Ｄ有关．同时计算了构象能量Ｅｃｏｎｆ和熵Ｓｃｏｎｆ这种方法为研究多链体系的热力学提供一种近似方法更多还原

【Abstract】 The partition function Z of short polymethylene chain confined in an infinite cylinder is calculated by employing the rotational isomeric state model and given by ln Z = a N + b. Here, N is the chain length of a chain,parameters a and b depend on temperature T and the diameter D of an infinite cylinder. The conformational energy E conf and entropy S conf are derived from the partition function using the canonical ensemble approach. The results of the short polymer chains confined in a cylinder can provide some thermodynamical properties of dense polymer chains.更多还原