线性高分子体系中高分子链间排除体积效应的模型化

Modeling the excluded volume effect between the chains in linear polymers

提出了线性高分子体系中高分子链间排除体积效应的一个它回避模型,并且针对具体的四个模型系统进行了计算机模拟.计算结果表明:1)线团的均方末端距〈R2〉与行走步数(N)仍然保持着与无规线团模型一样的线性关系;2)但与无规线团相比,线团的空间尺寸被压缩;3)与两侧方向的回避相比,在行走的前进方向的回避而导致的压缩效应更加明显.

A model of dodging （random） walk is proposed for the excluded volume effect between the chains in linear polymers, and computer simulations were performed for four model systems. The calculated results indicate that： （1） the relationship between the end-to-end distance of the coils 〈R2〉 and the walk steps N is still linear, same as that of the random coil; （2） but the coil size is suppressed compared with that of the random coils; and （3） the suppression of the coil size produced by dodging in the case of headon encounter is stronger than that in the case of walking abreast.