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首页> 外文期刊>Polymer Composites >Effect of micro-/nano-scale aramid fibrillated fibers on the tensile properties of styrene-butadiene latex
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Effect of micro-/nano-scale aramid fibrillated fibers on the tensile properties of styrene-butadiene latex

机译：微/纳米级芳族聚酰胺原纤维纤维对苯乙烯 - 丁二烯胶乳拉伸性能的影响

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摘要

Micro-/nanofibers attract extensive attention of being used as reinforcing agents in polymer composites. Fibrillated fibers have a hierarchical network structure, and a larger specific surface area. Thus, they provide additional anchorage sites in the composite, enhancing the bonding strength between different constituents. In this work, aramid fibrillated micro-/nanofibers (AFMNs) were prepared by a refining process. Styrene-butadiene latex (SBL) was used as the matrix, and it was mixed with AFMNs, formed AFMN/SBL composites. The mass fractions of AFMNs in the matrix are adjusted to 2%, 4%, 6%, and 8%. The microstructure of AFMNs and the fracture surfaces of AFMN/SBL composites were investigated by microscopical techniques. The results showed that the elastic modulus and tensile strength of AFMN/SBL composites are higher than that of the pure styrene-butadiene latex film, except tensile strain. With the increase of fiber content, the elastic modulus and tensile strength of AFMN/SBL composites increased from 5.15 MPa to 19.66 MPa and 2.35 MPa to 4.23 MPa, respectively. However, the tensile strain decreased from 101% to 35%. The calculated elastic modulus of Halpin-Tsai equation is close to the experimental values when the mass fractions of AFMNs is less than 6%.
机译：微/纳米纤维作为聚合物复合材料的增强剂受到了广泛关注。原纤化纤维具有层次网络结构和较大的比表面积。因此，它们在复合材料中提供了额外的锚固点，增强了不同成分之间的粘结强度。在这项工作中，通过精炼工艺制备了芳纶纤维化微/纳米纤维（AFMN）。以丁苯胶乳（SBL）为基体，与AFMNs共混，形成AFMN/SBL复合材料。将基质中AFMNs的质量分数调整为2%、4%、6%和8%。用显微技术研究了AFMN的微观结构和AFMN/SBL复合材料的断口。结果表明，除拉伸应变外，AFMN/SBL复合材料的弹性模量和拉伸强度均高于纯丁苯胶乳膜。随着纤维含量的增加，AFMN/SBL复合材料的弹性模量和拉伸强度分别从5.15mpa提高到19.66mpa和2.35mpa提高到4.23mpa。然而，拉伸应变从101%下降到35%。当AFMNs的质量分数小于6%时，Halpin-Tsai方程的计算弹性模量与实验值接近。

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