Sung Bong June, Yethiraj Arun
Theoretical Chemistry Institute and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, USA.
J Chem Phys. 2005 Dec 1;123(21):214901. doi: 10.1063/1.2131057.
The phase behavior of randomly coupled multiblock copolymer melts is studied using the polymer reference interaction site model integral equation theory. The molecules are modeled as flexible chains with random sequences of two types of blocks, each of which consists of the same number (R) of monomer beads. In the random copolymer (R=1) limit the theory predicts macrophase separation as the temperature is decreased for all values of the monomer correlation length lambda. For R>2, however, the theory predicts a microphase separation for values of lambda less than some critical value which increases as the block size increases.
利用聚合物参考相互作用位点模型积分方程理论研究了随机偶联多嵌段共聚物熔体的相行为。分子被建模为具有两种类型嵌段随机序列的柔性链，每种嵌段由相同数量（(R)）的单体珠子组成。在无规共聚物（(R = 1)）极限下，该理论预测，对于单体相关长度(\lambda)的所有值，随着温度降低会发生宏观相分离。然而，对于(R>2)，该理论预测，当(\lambda)值小于某个临界值时会发生微相分离，该临界值随着嵌段尺寸的增加而增大。
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