磨损

Abrasion and fatigue resistance of PDMS containing multiblock polyurethanes after accelerated water exposure at elevated temperature

ty10086 提交于 周四, 08/26/2021 - 13:35
Abstract(#br)Segmented polyurethane multiblock polymers containing polydimethylsiloxane and polyether soft segments form tough and easily processed thermoplastic elastomers (PDMS-urethanes). Two commercially available examples, PurSil 35 (denoted as P35) and Elast-Eon E2A (denoted as E2A), were evaluated for abrasion and fatigue resistance after immersion in 85 °C buffered water for up to 80 weeks.

玻璃气泡对PDMS基复合材料摩擦磨损特性的影响

ty10086 提交于 周三, 08/25/2021 - 15:49
研究目的是提高聚合物/陶瓷基复合材料的机械耐久性和表面摩擦特性。通过改变聚二甲基硅氧烷( PDMS )中微尺寸GBs的加入量,在不同的重量比( PDMS∶GB )下制备PDMS /玻璃气泡( GB )复合试样。根据GBs的添加比例对PDMS / GB复合材料的表面、力学和摩擦学性能进行了评价。通过有限元分析模拟,比较了裸PDMS和不同GB密度PDMS / GB复合材料与钢球尖接触后内应力随压痕深度的变化。弹性模量与GB含量成正比,而摩擦系数一般随着GB含量的增加而减小。PDMS / GB复合材料中较小的GB用量导致了比裸PDMS更多的表面损伤,但当PDMS∶GB的比例大于100∶5时,磨损率得到了明显的降低。