Southern Algeria is characterized by a harsh climate due to erosion by sandstorms. The characteristics of poly (methyl methacrylate) (PMMA) allow it to replace mineral glasses and improve its performance. The surfaces of eroded PMMA objects have altered optical and mechanical properties. The purpose of this study is to improve the hardness and erosion resistance of PMMA by the annealing and quenching process. The PMMA samples before being eroded at different impact angles were treated by two different heat treatments; namely: an annealing which represents the reference state followed by a quenching from T_g + 15 °C to different temperatures below T_g. Erosion resistance was found to be improved by the quenching process and contributing to the increase in optical transmission of PMMA samples tested at different impact angles. The most pronounced effect of quenching was observed for the impact angle 45° at a temperature of 20 °C by inducing the improvement of Vickers hardness (21.8 HV) which can be linked to the relaxation mode β around this temperature.

阿尔及利亚南部因沙尘暴侵蚀而气候恶劣。聚甲基丙烯酸甲酯（PMMA）的特性使其能够替代矿物玻璃并提高其性能。被侵蚀的 PMMA 物体的表面已经改变了光学和机械特性。本研究的目的是通过退火和淬火工艺提高 PMMA 的硬度和耐腐蚀性。PMMA样品在不同冲击角度侵蚀前经过两种不同的热处理；_{即：代表参考状态的退火，然后从 T g} + 15 °C淬火 至低于 T _{g的不同温度}。研究发现，淬火工艺可提高耐腐蚀性，并有助于提高在不同冲击角度下测试的 PMMA 样品的光学透射率。通过诱导维氏硬度 (21.8 HV) 的提高，在 20 °C 的温度下，对于 45° 的冲击角观察到最显着的淬火效果，这可以与该温度附近的松弛模式 β 相关。