title: [IR study of the hardening and maturation of glass ionomer cement].
abstract: The set reaction of glass ionomer cement has been investigated by means of IR spectra. It has been found that the band intensity around 1413 cm(-1) due to the vibration of polyacrylate salt increased with aging, and the shoulder band at 950 cm(-1) due to the stretching vibration of Si-OH still appeared during the periods studied. The results are consistent with that of mechanical determination of compressive strength, which suggested that the crosslink density increase resulting from the slow diffusion of Ca2+ and Al3+ is responsible for compressive strength increasing with aging, and forming and maturing of interface layer comprising of silica gel also have a significant effect on the properties of glass ionomer cements.
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Process, Wuhan University of Technology, Wuhan 430070, China.
authors.forename: Han-ting
authors.initials: HT
authors.lastname: Cheng
authors.forename: Han-xing
authors.initials: HX
authors.lastname: Liu
authors.forename: Qun
authors.initials: Q
authors.lastname: Xiao
mesh_terms: D019245:Compressive Strength; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006244:Hardness; D008422:Materials Testing; D046529:Microscopy, Electron, Transmission; D011208:Powders; D013055:Spectrophotometry, Infrared; D013997:Time Factors
chemical_list: D005899:Glass Ionomer Cements; D011208:Powders