Synergistic toughening effects of grafting modification and elastomer-olefin block copolymer addition on the fracture resistance of wood particle/polypropylene/elastomer composites
Synergistic toughening effects of grafting modification and elastomer-olefin block copolymer addition on the fracture resistance of wood particle/polypropylene/elastomer composites
复制标题
接枝改性和弹性体-烯烃嵌段共聚物添加的协同增韧作用对木颗粒/聚丙烯/弹性体复合材料断裂性能的影响
DOI：
10.1016/j.matdes.2019.107918
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发表时间：
2019-11-05
影响因子：
8.4
通讯作者：
Ou, Rongxian
中科院分区：
文献类型：
--
作者：
Yi, Shunmin;Xu, Shihua;Ou, Rongxian
通过在聚丙烯/OBC共混物上添加弹性体-烯烃嵌段共聚物（OBC）并接枝马来酸酐（MAH），制备了一种具有良好抗冲击性和刚度的新型木颗粒/聚丙烯/弹性体复合材料。接枝的MAH极大地改善了聚丙烯、OBC和木颗粒之间的界面相互作用，从而增强了所得复合材料的抗冲击性、刚度和尺寸稳定性。通过傅里叶变换红外光谱、扫描电子显微镜、力学测试和动态力学分析对改性基体及其复合材料进行了表征。结果证实，在木颗粒负载量为 60 wt% 的情况下，OBC 共混和 MAH 接枝之间的协同相互作用将 MAH 接枝共混物/木颗粒复合材料的冲击强度提高了 49%，其刚度与 MAH 接枝聚丙烯/木颗粒复合材料相当。尺寸稳定性测试、动态力学分析和形态观察证明，用 MAH 改性的复合材料还显示出聚丙烯、OBC 和木材颗粒之间的界面粘合力增强。 (C) 2019 年作者。由爱思唯尔有限公司出版
A novel wood particle/polypropylene/elastomer composites with good impact resistance and stiffness was prepared by adding elastomer-olefin block copolymer (OBC) and grafting maleic anhydride (MAH) on polypropylene/OBC blends. The grafted MAH greatly improved the interfacial interaction among polypropylene, OBC, and wood particle, resulting in an enhanced impact resistance, stiffness and dimensional stability of the resulting composites. The modified matrix and their composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, mechanical tests, and dynamic mechanical analysis. The results confirmed that with 60 wt% wood particles loading, the synergistic interactions between OBC blending and MAH grafting improved the impact strength of the MAH-grafted blends/wood particle composites by 49%, with stiffness comparable that of the MAH-grafted polypropylene/wood particle composites. The composites modified with MAH also revealed an enhanced interfacial adhesion among polypropylene, OBC, and wood particles, as evidenced by dimensional stability tests, dynamic mechanical analysis, and morphology observation. (C) 2019 The Authors. Published by Elsevier Ltd.