聚二甲基素作为线性低密度聚乙烯回收的加工,表面和机械性能的修饰剂
Arkadiusz Kloziński1, Przemysław Postawa2, Paulina Jakubowska1
1Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 60965 Poznan, Poland.
Materials (Basel, Switzerland)
|June 13, 2025
概括
在回收的线性低密度聚乙烯 (rLLDPE) 中添加聚二甲基 (PDMS) 增强了水性和光泽等表面特性. 这种修改改善了加工和表面特性,而不会对拉伸强度产生负面影响,使rLLDPE更具吸引力.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 表面化学 表面化学
背景情况:
- 回收线性低密度聚乙烯 (rLLDPE) 往往需要对更广泛的应用进行性能增强.
- 来自旋转成型的生产后废物为材料价值化提供了机会.
- 聚甲基 (PDMS) 作为一种潜在的添加剂,用于修改聚合物特性.
研究的目的:
- 研究PDMS添加对rLLDPE加工,表面和机械性能的影响.
- 评估PDMS作为改进器,以提高rLLDPE的性能和应用潜力.
- 为了确定理想的PDMS度,以实现所需的性能修改.
主要方法:
- 聚合物混合物rLLDPE和PDMS (0.1-2.0重量%) 通过双螺丝挤出和冷颗粒制备.
- 评估了加工特性,包括融化流速 (MFR) 和收缩.
- 测量了表面特性,如吸水,接触角度,摩擦系数和光泽.
- 评估了机械性能,包括硬度,抗拉强度和冲击强度.
主要成果:
- 添加PDMS减少了水的吸收,并增加了表面的疏水性 (更高的浸湿角度).
- 表面光泽得到改善,动态摩擦系数随着PDMS含量增加而下降.
- 点和硬度恶化,而拉伸强度没有受到影响.
- 冲击强度略有下降,裂形态发生了变化,导致表面光滑.
结论:
- PDMS有效地修改了rLLDPE的表面和加工特性,而不会影响拉伸强度.
- 增强的疏水性,光泽性和改变的加工特性表明PDMS修饰的rLLDPE具有显著的应用潜力.
- PDMS提供了一条可行的途径,以提高rLLDPE的吸引力,并可能缩短生产周期.
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