标题：Synthesis and Aggregation Behavior of Copolymer of Acrylamide with Pseudorotaxane Monomer by Threading Cucurbituril onto N '-(4-vinylbenzyl)-1,4-diaminobutane Dihydrochloride
作者：Ma, Qiang; Yang, Hui; Hao, Jingcheng; Tan, Yebang
作者机构：[Ma, Qiang; Yang, Hui; Tan, Yebang] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.; [Ma, Qiang; Yang, Hui; Tan, Yebang] Minist 更多
通讯作者地址：[Tan, YB]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.
来源：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
关键词：Cucurbituril; radical polymerization. polyrotaxanes; water soluble; copolymer
摘要：The novel side-chain copolymers of acrylamide (AM) and complex pseudorotaxane monomer N'-(4-vinylbenzyl)-1,4-diaminobutane dihydrochloride with cucurbituril (CB) threading (4VBCB) were prepared via free-radical polymerization in aqueous solution. The copolymers with CB (PAM4VBCB) were characterized by H-1 NMR, FTIR, elemental analysis, and static light scattering. The thermodynamic properties of polypseudorotaxanes were studied by thermogravimetric analysis (TGA) and dynamic light scattering (DSC). The average hydrodynamic radius (R-h) of the polypseudorotaxanes was studied by DLS. At the same time, pH and conductivity of the polypseudorotaxanes was studied. The experiment data show that CB beads are localized on 1,4-diaminobutane units in side chains of copolymer. TGA data show that thermal stability of the polypseudorotaxanes increases with the adding of the threading CB because of the enhanced rigidity and the bulky steric hindrance of 4VBCB in side chains of PAM4VBCB. DLS data show that the average hydrodynamic radius of polypseudorotaxanes increases with the increase of the copolymer concentration and has a jump with increasing with increasing pH due to the existing of the small size CB dethreading from the polypseudorotaxanes with increasing pH. Both pH and electrical conductivity curves of the solution of PAM4VBCB-4 have a jump because that CB could dethread from the polypseudorotaxanes with the addition of NaOH.