在聚烯共聚合物-天然CaSO (无水化物) 填充复合材料中平衡强度-冲击关系和其他关键性质
Marius Murariu1,2, Fouad Laoutid1, Yoann Paint1
1Laboratory of Polymeric and Composite Materials, Materia Nova Materials R&D Center & UMONS Innovation Center, 3 Avenue Copernic, 7000 Mons, Belgium.
International journal of molecular sciences
|August 26, 2023
概括
这项研究开发了使用天然无水化II (AII) 填充剂的新型矿物填充聚烯复合材料. 修改改进了机械和热性能,为包装和汽车应用创造了多功能材料.
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
- 复合材料 复合材料 复合材料
背景情况:
- 用天然CaSO4β-无水素II (AII) 填充的高冲击聚烯共聚合物 (PPc) 复合材料表现出增加的刚性,但在高填充剂含量下降了机械强度和抗冲击能力.
- 开发增强的PPc-AII复合材料需要战略来克服机械性能的局限性和提高热稳定性.
研究的目的:
- 开发具有增强硬度,机械强度,抗冲击和温度稳定的新型矿物填充复合材料.
- 研究两种修饰方法:用二烯酸盐 (ZA) 对PPc的离子修饰和用乙烯基二胺 (EBS) 对AII的表面修饰.
主要方法:
- 使用双螺杆挤出机 (TSEs) 将PPc与AII融混合.
- 通过ZA通过反应挤出 (REx) 进行Ionomeric修饰.
- 用EBS对AII进行表面修改.
- 形态,机械性能 (抗拉强度,抗冲击,柔性) 和热性能 (结晶温度,热偏移温度) 的全面表征.
主要成果:
- 离子学修饰 (REx) 导致复合材料具有显著的热稳定性,更高的结晶温度,更强的界面相互作用,更好的抗拉强度 (28MPa),增加了刚性和良好的抗冲击能力 (3.3-5.0kJ/m2).
- 使用EBS对AII的表面修改改善了颗粒分散和解,从而提高了柔性 (破裂时延伸260%) 和冲击性能 (4.3-5.3kJ/m2),即使在高填料含量下也是如此.
- 这两种方法都产生了具有明显性质配置,高白度和良好的加工能力的复合材料.
结论:
- 新型PPc-AII复合材料可以通过有针对性的修改,为特定应用量身定制.
- 离子学修饰增强了热和机械性能,而EBS表面修饰提高了柔性和抗冲击性.
- 这些复合材料为各种最终用途,包括包装和汽车零部件提供了有希望的性能平衡.
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