Thermo-Viscoelastic Characterization of 3D Printing Polymers

Polymer materials used in 3D printing exhibit degradation of material mechanical properties when exposed to thermal environments and expansions can induce residual stresses products or molds, which may result dimensional instability subsequent structural failures. In this study, based on linear thermo-viscoelastic principles, master curves, shift functions, glass transition temperatures for four different polymers techniques such as MultiJet Printing Digital Lighting Process were measured by using a dynamic analyzer. Based the single frequency test, temperature was measured. addition, measurements carried out over range at isothermal condition storage modulus vs. curves obtained. Then, moduli superposed into frequency–temperature superposition principle factors calculated function temperature. Subsequently, complex that curve-fitted onto generalized Maxwell models least squares method relaxation reference The effects temperature, frequency, time behaviors evaluated. Experimental results showed Polymers C D could be suitable use service above 100 °C highly crosslinked low reduction after about year. obtained through process utilized predict long-term performance polymer molds made given environmental condition.