Nanyang Technological University
New designs of stimuli sensitive polymers are under development by activation with various spectrums of the electromagnetic fields. However, few instruments are designed with the capability to record material properties in real-time under the influence of electric, light, or alternating magnetic fields. Herein, we present the development of rheometry measurements in real-time that quantify various liquid and elastic properties, including dynamic viscosity, gelation time, shear modulus, yield stress and resin expansion/shrinkage. The need for these advanced rheometer designs comes from novel designs of stimuli sensitive polymeric materials that are sensitive to electromagnic fields. Case studies of magnetic induction thermosets (magnetocuring), voltage activated adhesives (electrocuring), and light activated glues (photocuring) at elevated temperatures will be presented for interested collaborators. Polymeric initiation and propagation are observed in real-time, enabling tuning of mechanical properties and correlation of secondary measurements such as shrinkage, temperature, and infrared spectroscopy.
Abstract
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