Tensile Properties and Fracture Mechanism of Thermal Spraying Polyurea

Haotian Zhang; Yongyuan You; Yongsheng Jia; Jianian Hu; Peibo Li; Quanmin Xie

doi:10.3390/polym15010041

Tensile Properties and Fracture Mechanism of Thermal Spraying Polyurea

Polymers (Basel). 2022 Dec 22;15(1):41. doi: 10.3390/polym15010041.

Authors

Haotian Zhang^{1

2}, Yongyuan You^{1

2}, Yongsheng Jia^{1

2}, Jianian Hu^{1

2}, Peibo Li³, Quanmin Xie^{1

2}

Affiliations

¹ State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, China.
² Hubei Key Laboratory of Blasting Engineering of Jianghan University, Wuhan 430056, China.
³ State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.

Abstract

In this study, polyurea was experimentally tested under various spraying temperatures and pressures. The number of holes and the pore size produced after the tensile fracture of the polyurea were counted to illustrate the effect of the various spraying temperatures and pressures on the performance of the polyurea. The tensile characteristics of polyurea were greatly influenced by the spraying temperatures and pressures, according to the experimental findings and statistical analysis. The polyurea tensile performance was best when the spraying pressure was 17.25 MPa with a spraying temperature of 70 °C. The fracture mechanism was illustrated by the silver streaking phenomenon generated during the tensile stretching process. The fracture energy was absorbed by the fracture holes and pores during silver streaking, thus creating the huge gap in tensile properties.

Keywords: cracks; fracture performance; polyurea; pores; spraying pressure; spraying temperature.

Grants and funding

This research was funded by the Hubei Provincial Key Areas Research and Development Program (Grant No.: 2020BCA084).