Unintended Rate Enhancement in Mechanochemical Kinetics by Using Poly(methyl methacrylate) Jars
Kevin Linberg, Franziska Emmerling, Adam A. L. Michalchuk∞
Abstract
Time-resolved in situ (TRIS) X-ray diffraction has changed how mechanochemical transformations are studied but requires the use of X-ray transparent jars often made from poly(methyl methacrylate) (PMMA). However, using PMMA jars can alter the apparent kinetics of mechanochemical polymorphism by an order of magnitude, questioning the interpretability of established TRIS methods. Our results suggest that rate enhancement in PMMA jars may not be dominated by chemical effects of the polymer, but rather a result of different equilibrium temperatures within the jar. These features must be better understood before control over mechanochemical reactions can be achieved.
Topics & Concepts
Methyl methacrylateKineticsPolymerMethacrylateChemical engineeringMaterials sciencePolymer chemistryPoly(methyl methacrylate)ChemistryComposite materialPolymerizationEngineeringQuantum mechanicsPhysicsX-ray Diffraction in CrystallographyCultural Heritage Materials AnalysisBuilding materials and conservation