中国物理B ›› 2016, Vol. 25 ›› Issue (10): 106101-106101.doi: 10.1088/1674-1056/25/10/106101
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
Static and dynamic properties of polymer brush with topological ring structures: Molecular dynamic simulation
Wu-Bing Wan(万吴兵), Hong-Hong Lv(吕红红), Holger Merlitz(候格), Chen-Xu Wu(吴晨旭)
- 1 Institute of Softmatter and Biometrics, Xiamen University, Xiamen 361005, China;
2 Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China
Static and dynamic properties of polymer brush with topological ring structures: Molecular dynamic simulation
Wu-Bing Wan(万吴兵)1,2, Hong-Hong Lv(吕红红)1,2, Holger Merlitz(候格)1, Chen-Xu Wu(吴晨旭)1,2
- 1 Institute of Softmatter and Biometrics, Xiamen University, Xiamen 361005, China;
2 Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China
摘要：
By defining a topological constraint value (rn), the static and dynamic properties of a polymer brush composed of moderate or short chains with different topological ring structures are studied using molecular dynamics simulation, and a comparison with those of linear polymer brush is also made. For the center-of-mass height of the ring polymer brush scaled by chain length h～Nν, there is no significant difference of exponent from that of a linear brush in the small topological constraint regime. However, as the topological constraint becomes stronger, one obtains a smaller exponent. It is found that there exists a master scaling power law of the total stretching energy scaled by chain length N for moderate chain length regime, Fene～Nρν, for ring polymer brushes, but with a larger exponent ν than 5/6, indicating an influence of topological constraint to the dynamic properties of the system. A topological invariant of free energy scaled by <c>5/4 is found.
中图分类号: (Polymers, elastomers, and plastics)
- 61.41.+e