Enhancing mechanical and thermal properties of rigid poly(vinyl chloride) composites via stearic acid-treated zinc oxide filler

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Journal of Vinyl & Additive Technology Pub Date : 2024-11-21 DOI:10.1002/vnl.22178

Oum Keltoum Mallem, Narimene Zerguine, Fatma Zohra Benabid, Foued Zouai

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Abstract

Rigid poly(vinyl chloride) (PVC) exhibits limitations in mechanical performance and thermal stability. The aim of this study is to develop composite and nanocomposite materials with enhanced properties using zinc oxide (ZnO) as a filler to address the limitations of rigid PVC. The objective is to produce a cost-effective material with improved thermal stability and mechanical properties. To enhance dispersion and compatibility with PVC, the ZnO filler was surface-treated with stearic acid through a mechanical treatment process. The PVC/ZnO composites were prepared via melt mixing using a Brabender plastograph. The Fourier transform infrared spectroscopy and x-ray diffraction results indicate that the surface treatment significantly altered the ZnO microstructure, leading to improved ispersion within the PVC matrix. Consequently, this modification resulted in enhanced properties of the rigid PVC, with a notable improvement observed at a ZnO filler content of 2 wt%. The thermogravimetric results indicated that treated ZnO increased the thermal stability of PVC composites. The mechanical test (Tensile Testing) reveals that highest modulus of elasticity (2.8 GPa), tensile strength (41 MPa), and elongation at break (38%) was obtained with modified ZnO incorporation.

Highlights

Stearic acid improved ZnO filler dispersion and compatibility in rigid PVC.
Treated PVC/ZnO composites showed better thermal stability and mechanical properties.
FTIR, XRD, and TGA confirmed the surface treatment's impact on composites.

Abstract Image

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通过硬脂酸处理氧化锌填料提高硬质聚氯乙烯复合材料的机械和热性能

硬质聚氯乙烯（PVC）在机械性能和热稳定性方面存在局限性。本研究的目的是以氧化锌（ZnO）为填料，开发性能更强的复合材料和纳米复合材料，以解决硬质聚氯乙烯的局限性。目的是生产出一种具有成本效益、热稳定性和机械性能更佳的材料。为了提高分散性和与聚氯乙烯的相容性，通过机械处理工艺用硬脂酸对氧化锌填料进行了表面处理。PVC/ZnO 复合材料是通过使用布拉本德塑形仪进行熔融混合制备的。傅立叶变换红外光谱和 X 射线衍射结果表明，表面处理显著改变了氧化锌的微观结构，从而改善了其在 PVC 基体中的分散性。因此，这种改性提高了硬质聚氯乙烯的性能，在氧化锌填料含量为 2 wt% 时，性能明显改善。热重结果表明，经过处理的氧化锌提高了聚氯乙烯复合材料的热稳定性。机械测试（拉伸测试）表明，加入改性氧化锌后，弹性模量（2.8 GPa）、拉伸强度（41 MPa）和断裂伸长率（38%）均达到最高水平。亮点硬脂酸改善了氧化锌填料在硬聚氯乙烯中的分散性和相容性。经过处理的 PVC/ZnO 复合材料具有更好的热稳定性和机械性能。傅立叶变换红外光谱、X 射线衍射和热重分析证实了表面处理对复合材料的影响。

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来源期刊

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.