Dynamic mechanical and ultrasonic properties of polyurea

• Published in: Mechanics of materials Vol. 43; no. 10; pp. 598 - 607
• Main Authors: Qiao, Jing, Amirkhizi, Alireza V., Schaaf, Kristin, Nemat-Nasser, Sia, Wu, Gaohui
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2011; Elsevier
• Subjects: Applied sciences; Deviation; Dynamic mechanical properties; Dynamics; Exact sciences and technology; Mathematical models; Mechanical analysis; Mechanical properties; Physical properties; Polymer industry, paints, wood; Polyurea; Polyureas; Properties and testing; Shear; Technology of polymers; Temperature dependence; Time–temperature superposition; Polyurea; Mechanical properties; Time–temperature superposition; Viscoelasticity; Master equation; Elastic modulus; Frequency dependence; Shear modulus; Urea polymer; Time-temperature superposition; Dynamic mechanical analysis; Time dependence; Strain wave; Activation energy; Ultrasonic method

► We present the storage and loss moduli of polyurea at various temperatures and frequencies. ► The master curves of the moduli are derived. ► The relaxation spectra are calculated by means of two approximate models. ► The ultrasonic wave propagation is tested at low temperatures and high frequencie...