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arXiv 1202.4595cond-mat.softcond-mat.dis-nn
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polymer浓度和链长对物理缔合polymer溶液中聚集的影响

Effects of polymer concentration and chain length on aggregation in physically associating polymer solutions

X. -G. Han, X. -F. Zhang, Y. -H. Ma, C. -X. Zhang, Y. -B. Guan

摘要:

采用自洽场格子模型研究了缔合聚合物溶液中聚合物浓度和链长对聚集行为的影响。在不同链长的体系中,只观察到两种非均匀形态,即微涨落均匀(MFH)和胶束形态。上述两种不均匀形态首次出现的温度分别用T_MFH和T_m表示,取决于聚合物浓度和链长。临界MFH浓度的对数随链长的对数的变化符合斜率为-1的线性拟合关系。在此基础上,重点研究了在T_m时胶束核中粘着剂的平均体积分数(AVFSM)随聚合物浓度和链长的变化规律。通过计算发现,AVFSM的上述行为可以从链内和链间缔合的角度来解释。

英文摘要:

The effects of polymer concentration and chain length on aggregation in associative polymer solutions, are studied using self-consistent field lattice model. Only two inhomogenous morphologies, i.e. microfluctuation homogenous (MFH) and micelle morphologies, are observed in the systems with different chain lengths. The temperatures at which the above two inhomogenous morphologies first appear, which are denoted by T_MFH and T_m, respectively, are dependent on polymer concentration and chain length. The variation of the logarithm of critical MFH concentration with the logarithm of chain length fulfils a linear-fitting relationship with a slope equaling -1. Furthermore, the variation of the average volume fraction of stickers at the micellar core (AVFSM) with polymer concentration and chain length is focused in the system at T_m. It is founded by calculations that the above behavior of AVFSM, is explained in terms of intrachain and interchain associations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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