Structural and nonlinear J-integral fracture toughness for nanoclay toughened ternary HDPE/LDPE-g-MA/ABS blend nanocomposites

IF 2.3 3区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES
Mushtaq Albdiry
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Abstract

High-density polyethylene (HDPE) has a higher strength-to-density ratio and stiffness but a low branching degree for the packed linear chains that restrict the ability to bond and resist cracking. This study conducts the role of inserting rigid nanoclay (NC) and soft acrylonitrile butadiene styrene (ABS) on the structural, nonlinear fracture toughness and crack resistance of a ternary HDPE/low-density polyethylene-grafted maleic anhydrite (LDPE-g-MA)/ABS blend. Varying additions of 1, 3, 5, and 7 % NC and 5, 10, 15 wt. % ABS were inserted into neat HDPE and HDPE90/LDPE-g-MA10. All materials were hand-mixed before feeding into a single screw extruder and directly melt-blended twice to achieve a good dispersion of nanofiller in the matrix. The structural characteristics and the fracture surfaces of NC/HDPE/LDPE-g-MA and NC/HDPE/LDPE-g-MA/ABS were investigated by TEM, XRD, SEM, and FTIR spectra. Tensile strength and the critical dissipated energy (JIc) determined by quasi-static J-integral fracture mechanic revealed a higher absorbing fracture energy of 75 KJ/m2 for the binary and 85 KJ/m2 for the ternary nanocomposites. The synergistic percolated role of the NC particles and ABS copolymer in front of the crack tip region hinders crack growth for the presence of micro-void coalescence and massive shear-yielding toughening mechanisms.
纳米粘土增韧三元高密度聚乙烯/低密度聚乙烯-g-MA/ABS 共混纳米复合材料的结构韧性和非线性 J 积分断裂韧性
高密度聚乙烯(HDPE)具有较高的强度密度比和刚度,但其包装线性链的支化程度较低,从而限制了其粘合和抗裂能力。本研究探讨了添加硬质纳米粘土(NC)和软质丙烯腈-丁二烯-苯乙烯(ABS)对高密度聚乙烯/低密度聚乙烯-接枝马来酸酐(LDPE-g-MA)/ABS 三元共混物的结构、非线性断裂韧性和抗裂性的影响。在纯高密度聚乙烯和高密度聚乙烯 90/LDPE-g-MA10 中分别加入不同添加量的 1%、3%、5% 和 7% NC 以及 5%、10%、15% ABS。所有材料在喂入单螺杆挤出机之前都经过手工混合,并直接熔融混合两次,以实现纳米填料在基体中的良好分散。通过 TEM、XRD、SEM 和 FTIR 光谱研究了 NC/HDPE/LDPE-g-MA 和 NC/HDPE/LDPE-g-MA/ABS 的结构特征和断裂面。通过准静态 J 积分断裂力学测定的拉伸强度和临界耗散能 (JIc) 表明,二元纳米复合材料的吸收断裂能较高,为 75 KJ/m2,三元纳米复合材料的吸收断裂能较高,为 85 KJ/m2。在裂纹尖端区域前,NC 颗粒和 ABS 共聚物的协同渗透作用阻碍了裂纹的增长,因为存在微空洞凝聚和大规模剪切屈服增韧机制。
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来源期刊
Journal of Composite Materials
Journal of Composite Materials 工程技术-材料科学:复合
CiteScore
5.40
自引率
6.90%
发文量
274
审稿时长
6.8 months
期刊介绍: Consistently ranked in the top 10 of the Thomson Scientific JCR, the Journal of Composite Materials publishes peer reviewed, original research papers from internationally renowned composite materials specialists from industry, universities and research organizations, featuring new advances in materials, processing, design, analysis, testing, performance and applications. This journal is a member of the Committee on Publication Ethics (COPE).
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