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| Weather Resistance of Polyurethane Cushioning Materials in Two Typical Environments |
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| DOI：10.7643/issn.1672-9242.2023.01.017 |
| KeyWord:polyurethane (PU) cushioning material aging in natural environment static mechanical properties, compression set |
| Author | Institution |
| HU Tao |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
| LI Qian |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
| SUN Mao-jun |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
| SUN You-mei |
Wanning Materids Corrosion National Observation and Research Station, Hainan Wanning , China |
| ZHANG Chen |
Wanning Materids Corrosion National Observation and Research Station, Hainan Wanning , China |
| WANG Ling |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
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| Abstract: |
| The work aims to study the aging performance of polyurethane cushioning material in hot humid ocean and hot dry desert environments. Through a one-year natural environment experiment of three different apparent densities of polyurethane cushioning materials at Wanning Test Station and Dunhuang Test Station, the appearance, static compression performance, compression set performance and infrared spectrum changes of polyurethane cushioning materials were explored. The results showed that the compressive strength of the material first increased and then decreased, and the compression set gradually increased; In Wanning Test Station, the surface of the sample showed mildew. The compressive strength of polyurethane cushioning materials with densities of 25, 30 and 40 kg/m3 attenuated to 106.4%, 93.3% and 87.5%, respectively, and the compression set increased by 109%, 98% and 138%, respectively; In Dunhuang Test Station, the compressive strength of polyurethane cushioning materials with densities of 25, 30 and 40 kg/m3 increased or attenuated to 106.4%, 98.2% and 97.8%, respectively, and the compression set increased by 55%, 74% and 93%, respectively. The performance of polyurethane cushioning materials will decrease due to aging reactions such as hydrolysis and thermal oxygen degradation in the natural environment. The greater the apparent density of the material, the faster the performance degradation. Thus, the aging degree of polyurethane cushioning material at Wanning Station is greater than that at Dunhuang station, and it is more sensitive to the hot and humid marine environment. |
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