作者：Xiaodong Wang, Yunbao Gao, Jing Jin, Wei Jiang
关键字：均聚聚丙烯, 高抗冲, 高刚性, 核壳粒子, SiO2/POE
论文来源：期刊
具体来源：Macromolecules, 2024, 57(9), 4576-4583
发表时间：2024年

摘要：聚合物增韧的显著缺点之一是韧性与刚性之间的权衡。基于前期研究，制备高抗冲、低刚性损失的橡胶粒子增韧聚合物复合材料时，最好具有高模量核和低模量壳。问题在于能否通过提高核模量来构建高抗冲聚合物复合材料，同时保持或提高其刚性。本文采用SiO2/POE核壳粒子增韧聚合物复合材料。理论分析表明，复合材料的模量可远高于聚合物基体；PP复合材料的刚性受核（SiO2）和壳（POE）材料组成以及SiO2/POE核壳粒子用量的显著影响。实验成功制备了高抗冲、高刚性PP复合材料，缺口冲击强度为44.6 kJ/m2，弯曲模量为1644 MPa，与理论计算一致。据我们所知，这是性能最高的兼具优异冲击强度和刚性的PP复合材料。

Abstract：One of the significant drawbacks of polymer toughening is the trade-off between improved toughness and reduced rigidity. Based on our previous research, to produce rubber particle-toughened polymer composites with high impact and low rigidity loss, it is best to have a high modulus for the core and a low modulus for the shell. The question is whether we can construct high-impact polymer composites while maintaining or increasing their rigidity by increasing the core modulus. Here, SiO2/POE core-shell particles are used to toughen the polymer composites. According to theoretical analysis, the modulus of the composites can be much higher than that of the polymer matrix. Additionally, the rigidity of the PP composites is greatly influenced by the composition of the core (SiO2) and shell (POE) materials, as well as the amount of SiO2/POE core-shell particles. Experimentally, a PP composite with high impact and high rigidity is successfully fabricated. The notched impact strength is 44.6 kJ/m2, and the flexural modulus is 1644 MPa, consistent with the theoretical calculations. To the best of our knowledge, this is the highest-performing PP composite with excellent impact strength and rigidity.

论文链接：https://doi.org/10.1021/acs.macromol.3c02530