标题： 环形星形聚合物的构象和拓扑结构 显示英文标题

标题： Conformation and topology of cyclical star polymers

摘要： 我们研究了具有$f$个环臂的环形星形聚合物的构象和拓扑性质，每个臂由$n$个珠子组成。 我们发现未链接的环形星形聚合物的构象性质与具有$2f$个臂、每个臂由$n/2$个珠子组成的线性星形聚合物的性质相容。 当星形的拓扑结构（以臂之间的连接程度来衡量）发生变化时，这种相容性会消失。 事实上，当允许连接时，我们注意到回转半径随着臂的绝对连接数$\vert Lk \vert$的变化而变化，无论采用何种引入所述连接的协议。 此外，通过径向密度函数可以看出，当$\vert Lk \vert$的值较大时，大分子的内部结构会发生定性的变化。 显示英文摘要

摘要： We study the conformation and topological properties of cyclical star polymers with $f$ ring arms, each made of $n$ beads. We find that the conformational properties of unlinked cyclical star polymers are compatible to those of linear star polymers with $2f$ arms made of $n/2$ beads each. This compatibility vanishes when the topology of the star, measured as the degree of linking between arms, changes. In fact, when links are allowed we notice that the gyration radius decreases as a function of the absolute linking number $\vert Lk \vert$ of the arms, regardless of the protocol that is employed to introduce said links. Furthermore, the internal structure of the macromolecules, as highlighted by the radial density function, changes qualitatively for large values of $\vert Lk \vert$.