title: 13C NMR spectroscopic analysis of poly(electrolyte) cement liquids.
abstract: 13C NMR spectroscopy has been applied to the analysis of carboxylic poly-acid cement liquids. Monomer incorporation, composition ratio, sequence statistics, and stereochemical configuration have been considered theoretically, and determined experimentally, from the spectra. Conventionally polymerized poly(acrylic acid) has an approximately random configuration, but other varieties may be synthesized. Two commercial glass-ionomer cement liquids both contain tartaric acid as a chelating additive but the composition of their poly-acids are different. Itaconic acid units, distributed randomly, constitute 21% of the repeating units in one of these polyelectrolytes.
mesh_terms: D000180:Acrylic Resins / Q000032:analysis*; D000538:Aluminum Silicates / Q000032:analysis*; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003738:Dental Cements / Q000032:analysis*; D004573:Electrolytes; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D011076:Polycarboxylate Cement / Q000032:analysis*; D011108:Polymers; D013057:Spectrum Analysis
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; D002247:Carbon Isotopes; D003738:Dental Cements; D004573:Electrolytes; D011076:Polycarboxylate Cement; D011108:Polymers