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首页> 外文期刊>Journal of Applied Polymer Science >The use of recycled low-density polyethylene films from protective prepreg for the development of nanocomposites with bentonite clay
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The use of recycled low-density polyethylene films from protective prepreg for the development of nanocomposites with bentonite clay

机译：使用来自保护性预浸料的再生低密度聚乙烯薄膜用于膨润土粘土的纳米复合材料的发育

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摘要

Prepreg is a pre-impregnated composite fiber where a thermoset polymer matrix material is present. Before being used, these materials are kept at low temperatures and have a low-density polyethylene (LDPE) film for your protection. The increase in the use of structural composites based on prepregs causes an increase in the amount of protective LDPE film. This material is usually discarded or incinerated and can cause great damage to the environment. Thus, the present work aimed to study the feasibility of recycling up to 100% of protective LDPE (rLDPE) to develop blends-based nanocomposites with rLDPE/virgin LDPE (60/40, 70/30, 80/20, 90/10 and 100/0) with the addition of 5 wt% of compatibilizer agent (maleic anhydride grafted LDPE, LDPE-g-MA), and 1 wt% of bentonite (BNT) using a co-rotational twin-screw extruder, followed by hot pressing in a hydropneumatic press and die-cutting. Water absorption test, thermal aging resistance, morphological characterization by scanning electron microscopy, mechanical properties by Izod impact strength and tensile tests, and differential scanning calorimetry were performed. By the results, it was possible to verify the viability of 100% of the recycling of rLDPE. The results showed a good distribution of 1 wt% of BNT in the matrix, better mechanical properties when compared with virgin LDPE. Furthermore, the thermal properties, water absorption test, and thermal aging resistance showed no statistical differences between the samples. These results confirm the effectiveness and the environmental gain in the use of the recycled material.
机译：预浸料是一种预浸渍复合纤维，其中含有热固性聚合物基体材料。在使用前，这些材料会保持在低温下，并有一层低密度聚乙烯（LDPE）薄膜保护您。基于预浸料的结构复合材料的使用增加了LDPE保护膜的数量。这种材料通常被丢弃或焚烧，会对环境造成巨大损害。因此，本研究旨在研究回收高达100%的保护性LDPE（rLDPE）的可行性，以使用同向旋转双螺杆挤出机，通过添加5 wt%的增容剂（马来酸酐接枝LDPE，LDPE-g-MA）和1 wt%的膨润土（BNT），开发rLDPE/原始LDPE（60/40、70/30、80/20、90/10和100/0）共混基纳米复合材料，然后在液压气动压力机中进行热压和模切。进行了吸水性试验、耐热老化性、扫描电子显微镜的形态表征、伊佐德冲击强度和拉伸试验的机械性能以及差示扫描量热法。根据结果，可以验证100%回收rLDPE的可行性。结果表明，1 wt%的BNT在基体中分布良好，力学性能优于未经处理的LDPE。此外，样品之间的热性能、吸水率测试和耐热老化性能没有统计差异。这些结果证实了回收材料的有效性和环境效益。

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