两性聚电解质单链的构象转变

Monte-Carlo Simulations of a Single Diblock Polyampholyte Chain in a Solution

利用并行回火蒙特卡洛方法对溶液中二嵌段两性聚电解质单链的构象转变进行了研究.模型二嵌段两性聚电解质链是由两个连续的嵌段组成,其中1个嵌段是由正负电荷交替的两性聚电解质链组成,另一嵌段是由只含有1种电荷的单性聚电解质链组成.由于两性聚电解质链和单性聚电解质链的相变温度不同,研究的二嵌段两性聚电解质单链在两个温度出现了两次相变.

The phase transitions of a single diblock polyampholyte chain in solutions are studied by replica-exchange Monte-Carlo simulations. The model diblock polyampholyte chain consists of two consecutive blocks, with one block composed of a polyampholyte chain where the monomers composed of alternating distribution of positive and negative charges, while the other block composed of a polyelectrolyte chain with only one type of charge. Owing to the difference of the phase transition temperatures of the polyampholyte and polyelectrolyte blocks, the diblock polyampholyte chain has two phase transitions.