Tailoring LLDPE properties with modified palygorskite fillers: A comprehensive study

IF 3.2 4区 工程技术 Q2 ENGINEERING, CHEMICAL
Thais Ferreira da Silva, Eduardo Quinteiro, Guilherme Henrique França Melo, Guilherme Ferreira de Melo Morgado, Uttandaraman Sundararaj, Ana Paula Fonseca Albers, Fabio Roberto Passador
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引用次数: 0

Abstract

Linear low‐density polyethylene (LLDPE) is a polyolefin known for its superior low‐temperature heat seal ability, low‐temperature tolerance, and bag‐tear resistance which are important features for the polymeric packaging sector. In this work, to improve the mechanical properties and expand the range of applications of LLDPE, the microfibrillar clay mineral palygorskite (PAL) was added. However, the use of PAL as a reinforcing agent for polymers depends on its purification process to extract accessory minerals such as calcite, dolomite, and quartz. In addition to this purification process, two surface modifications were used on the purified PAL (PALp) to improve interactions with LLDPE: silanization with aminosilane (PALs) and organophilization by incorporating an organic compound (PALo). The PAL were characterized according to their morphological properties using transmission electron microscopy (TEM), X‐ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT‐IR). The films of LLDPE/PAL, with varying levels (1, 3, and 5 wt%) and types of PAL (raw PAL, PALp, PALs, and PALo), were prepared by an extrusion process, and films were prepared by compression molding, without preferred orientation. The films were characterized by rheological analyses, tensile tests, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and water vapor permeability. Incorporating modified PAL was significant in enhancing the mechanical properties of the nanocomposites. LLDPE/PALs with the addition of 3 wt% PALs showed a 14% increase in elastic modulus (281.08 ± 8.25 MPa) compared to the nanocomposite with 3 wt% of raw PAL (243.43 ± 15.01 MPa).Highlights The PAL is a clay mineral with a fibrous morphology and has a low cost. The technique to purify PAL is a quick, simple, and inexpensive technique. Comparison between of two technique surface modification of PAL. The effectiveness of modifications of PAL was confirmed in LLDPE films. The surface modification with silanization was more effective.
用改性褐铁矿填料定制 LLDPE 性能:综合研究
线性低密度聚乙烯(LLDPE)是一种聚烯烃,因其出色的低温热封能力、低温耐受性和耐撕袋性而闻名,这些都是聚合包装领域的重要特性。在这项工作中,为了改善 LLDPE 的机械性能并扩大其应用范围,添加了微纤维粘土矿物堇青石(PAL)。然而,将 PAL 用作聚合物的增强剂取决于其提纯过程,以提取方解石、白云石和石英等附属矿物。除了纯化过程外,还对纯化的 PAL(PALp)进行了两种表面改性,以改善与 LLDPE 的相互作用:氨基硅烷硅烷化(PALs)和加入有机化合物的有机化(PALo)。使用透射电子显微镜(TEM)、X 射线衍射(XRD)和傅立叶变换红外光谱(FT-IR)对 PAL 的形态特性进行了表征。不同含量(1、3 和 5 wt%)和不同类型(未加工的 PAL、PALp、PALs 和 PALo)的 LLDPE/PAL 薄膜是通过挤出工艺制备的,而薄膜是通过压缩成型工艺制备的,没有优先取向。通过流变分析、拉伸试验、差示扫描量热仪 (DSC)、热重分析 (TGA)、扫描电子显微镜 (SEM) 和水蒸气渗透性对薄膜进行了表征。加入改性 PAL 能显著提高纳米复合材料的机械性能。与含有 3 wt% 未加工 PAL 的纳米复合材料(243.43 ± 15.01 MPa)相比,添加了 3 wt% PAL 的 LLDPE/PAL 的弹性模量(281.08 ± 8.25 MPa)增加了 14%。提纯 PAL 的技术是一种快速、简单且成本低廉的技术。比较两种 PAL 表面改性技术。在 LLDPE 薄膜中证实了改性 PAL 的有效性。硅烷化的表面改性效果更好。
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来源期刊
Polymer Engineering and Science
Polymer Engineering and Science 工程技术-高分子科学
CiteScore
5.40
自引率
18.80%
发文量
329
审稿时长
3.7 months
期刊介绍: For more than 30 years, Polymer Engineering & Science has been one of the most highly regarded journals in the field, serving as a forum for authors of treatises on the cutting edge of polymer science and technology. The importance of PE&S is underscored by the frequent rate at which its articles are cited, especially by other publications - literally thousand of times a year. Engineers, researchers, technicians, and academicians worldwide are looking to PE&S for the valuable information they need. There are special issues compiled by distinguished guest editors. These contain proceedings of symposia on such diverse topics as polyblends, mechanics of plastics and polymer welding.
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