Chain Conformation of Star Comb-like Polymers in Dilute Solutions
The conformation of star comb-like polymer chains in dilute solutions was investigated using Brownian dynamics simulations.The results show that when the grafting density of the star comb-like chains is less than 0.2,the conformation is star-shaped.With the increase of the grafting density,the conformation gradually changes to spherical.In addition,the stretching factor can also reflect the conformational transition from star to spherical shape.The stiffness of the star comb-like chain backbone is less affected by the length of the side chains,but more affected by its grafting density.As the length of side chains increases,the persistence length of side chains increases accordingly,but the relative rigidity strength decreases with the increase in side chain length.This study reveals the relationship between conformation and molecular parameters of star comb-like polymers in dilute solutions,which helps to facilitate relevant characterization studies.
Star comb-like polymersChain ConformationBrownian dynamics
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