Dependences of Rheological and Compression Mechanical Properties on Cellular Structures for Impact-Protective Materials.
作者：Miao Tang, G. Huang, H. H. Zhang, Y. L. Liu, H. J. Chang, H. Z. Song, Donghua Xu,* Zhigang Wang*
關鍵字：///
論文來源：期刊
具體來源：ACS Omega 2017, 2, 2214-2223.
發表時間：2017年
In this study, three typical impact-protective materials, D3O,
PORON XRD, and DEFLEXION were chosen to explore the dependences of
rheological and compression mechanical properties on the internal cellular
structures with polymer matrix characteristics, which were examined using
Fourier transform infrared spectroscopy, thermogravimetric analyses, and
scanning electron microscopy with energy dispersive spectroscopy. The
rheological property of these three foaming materials were examined using a
rheometer, and the mechanical property in a compression mode was further
examined using an Instron universal tensile testing machine. The dependences
of rheological parameters, such as dynamic moduli, normalized moduli, and
loss tangent, on angular frequency, and the dependences of mechanical
properties in compression, such as the degree of strain-hardening, hysteresis,
and elastic recovery, on the strain rate for D3O, PORON XRD, and
DEFLEXION can be well-correlated with their internal cellular structural
parameters, revealing, for example, that D3O and PORON XRD exhibit simultaneously high strength and great energy loss in a high-frequency impact, making them suitable for use as soft, close-fitting materials; however, DEFLEXION dissipates much
energy whether it suffers a large strain rate or not, making it suitable for use as a high-risk impact-protective material. The rheometry and compression tests used in this study can provide the basic references for selecting and characterizing certain
impact-protective materials for applications.