title: Thermo-reversible gelation of atactic poly(methyl methacrylate) in poly(ethylene glycol) oligomers.
abstract: The temperature-concentration behavior of physical gel by atactic poly(methyl methacrylate) (aPMMA) in poly(ethylene glycol) oligomer (PEG400) was investigated. A liquid-liquid demixing interferes with a glass transition during cooling. The combination of demixing and T g leads to the formation of amorphous gels at low temperature. We suggest that the gelation of aPMMA/PEG400 is a glassy gel, in which short-range attractive depletion interaction in the polymer/oligomer system was the driving force at molecular level.
authors.affiliation: Department of Polymer Science and Engineering, the School of Chemistry and Chemical Engineering, The State Key Laboratory of Coordination Chemistry, Nanjing University, 210093 Nanjing, P.R. China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Gao
authors.forename: Chunhong
authors.initials: C
authors.lastname: Yu
authors.forename: Minzhi
authors.initials: M
authors.lastname: Chen
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Wang
authors.forename: Dongshan
authors.initials: D
authors.lastname: Zhou
authors.forename: Gi
authors.initials: G
authors.lastname: Xue
mesh_terms: D005782:Gels; D011092:Polyethylene Glycols / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D012212:Rheology; D012996:Solutions; D013696:Temperature; D013816:Thermodynamics
chemical_list: D005782:Gels; D012996:Solutions; D011092:Polyethylene Glycols; D019904:Polymethyl Methacrylate