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The effects of weathering exposure on unfilled and filled thermoplastic polyurethanes (TPU) materials are described as performed under different humidity conditions. For this purpose, a weathering device was used with UV-A 340 nm lamps at a constant temperature of 40 °C. The effects of environmental (UV and humidity condition) degradation on the frictional properties of TPU materials are presented along with surface analyses to characterize the chemistry of the degradative process. Photooxidative degradation of unfilled polymer leads to deterioration of physical and mechanical properties, which affects its tribological behavior significantly. Due to crosslinking, the stiffness of the material increases, reducing drastically the friction coefficient of unfilled TPUs. The frictional behavior of glass fiber reinforced TPU is less affected by radiation.
The effects of UV radiation and humidity condition on the frictional properties of TPU materials are presented in this paper.
Photooxidative degradation of polymer leads to deterioration of physical and mechanical properties, which affect its tribological behavior significantly.
Unfilled TPUs lose their anti-slip properties.
The effects of UV radiation and humidity condition on the frictional properties of TPU materials are presented in this paper.
Photooxidative degradation of polymer leads to deterioration of physical and mechanical properties, which affect its tribological behavior significantly.
Unfilled TPUs lose their anti-slip properties.