【摘要】：玄武巖纖維(BF)未經(jīng)改性處理和經(jīng)硅烷偶聯(lián)劑(KH 550和KH 570)進行處理后,添加到高密度聚乙烯(PE HD)基體樹脂中,增強PE HD的力學(xué)性能,用傅立葉變換紅外光譜和掃描電子顯微鏡對硅烷偶聯(lián)劑處理的BF進行表征,同時,用SEM觀察BF增強PE HD復(fù)合材料的拉伸斷面。結(jié)果表明,隨著未經(jīng)改性處理BF添加量增加,PE HD復(fù)合材料的拉伸強度、彎曲強度逐漸提高,當添加量達到30%時,拉伸強度達到45.5 MPa,提升79.1%;彎曲強度達到41.3 MPa,提升118.9%。經(jīng)KH 550和KH 570處理的BF添加量達到20%時,PE HD復(fù)合材料的拉伸強度均達到45 MPa以上,其后隨著BF添加量繼續(xù)增加,拉伸強度變化不大,而彎曲強度隨BF添加量的增加逐漸增大。當BF添加量達到30%時,BF改性與否對PE HD復(fù)合材料的力學(xué)性能的影響不大。當改性BF添加量為5%~15%時,KH 550改性的PE HD復(fù)合材料的力學(xué)性能較KH 570改性的高;當改性BF添加量為20%,25%時,KH 570改性的PE HD復(fù)合材料的力學(xué)性能較KH 550改性的高。
[Abstract]:Basalt fiber (BF) was added to the matrix resin of high density polyethylene (PE) to enhance the mechanical properties of PE HD after unmodified and treated with silane coupling agents (KH C550 and KH 570). The BF treated with silane coupling agent was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). At the same time, the tensile section of PE / HD composite reinforced by BF was observed by SEM. The results show that the tensile strength and flexural strength of PE / HD composites increase gradually with the increase of the content of unmodified BF. The tensile strength increases 79.1% and the flexural strength reaches 41.3 MPa, and 118.9%, respectively, when the content reaches 300.The tensile strength increases 79.1% and 41.3 MPa, respectively. The tensile strength of PE / HD composites reached more than 45 MPa when the content of BF was 20, and the tensile strength of PE / HD composites increased with the increase of BF content, but the flexural strength increased gradually with the increase of BF content. When the content of BF reaches 30%, the effect of BF modification on the mechanical properties of PE / HD composites is not significant. When the content of modified BF is 5 ~ 15%, the mechanical properties of PE / HD composites modified by KH T550 are higher than those modified by KH / HD, and the mechanical properties of PE / HD composites modified by KH 570 are higher than those modified by KH / BF when the content of modified BF is 20 and 25.
【作者單位】： 四川大學(xué)高分子科學(xué)與工程學(xué)院;
【分類號】：TQ325.12;TB332

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