Bio-based and effective: Cardanol-piperidine derivatives for enhanced polypropylene resistance against thermo- and photo-oxidative aging

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Journal of Vinyl & Additive Technology Pub Date : 2024-05-20 DOI:10.1002/vnl.22113

Xuemei Zeng, Jianxiang Feng, Yulin He, Siyu Cao, Cheng Zhou, Kangqi Li, Jinjing Tan, Shuyi Chen, Yong Xia, Yuejun Liu, Pu Shi, Jin Zhu

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引用次数: 0

Abstract

Bio-based antioxidants have garnered attention for their sustainability and environmental benefits. In this study, we designed and synthesized three cardanol-piperidine derivatives (HSs) by utilizing hydrogenated cardanol (HC) and piperidine derivatives to improve the aging inhibition of polypropylene (PP). These bio-based antioxidants were intended as eco-friendly alternatives to conventional synthetic antioxidants. The impact of these HSs on the thermal stability, thermo-oxidative stability, and light stability of PP was thoroughly evaluated. The results unveiled that after 5 h of interaction with 2,2-diphenyl-1-picrylhydrazyl free radical, HSs exhibited a remarkable over 5-fold increase in free radical scavenging efficiency as compared to HC. Moreover, the addition of HSs significantly increased the oxidation induction time and the initial oxidation temperature compared to pristine PP. After photo-oxidative aging and thermo-oxidative aging, the HS-dosed PP demonstrated remarkable retention of elongation at break, reaching more than 72% and 69%. From the comparison with physical mixtures and the density functional theory calculations, an intramolecular synergism mechanism is proposed. The intramolecular synergism between hydrogenated cardanol and piperidine derivatives may be the main reason for the inhibition of PP aging.

Highlights

A method for constructing simultaneous efficient light, thermal, and oxygen stable polypropylene.
The mechanism for achieving simultaneous stabilization of light, heat, and oxygen is the intramolecular synergy of phenol piperidine.
The essence of intramolecular synergy of cardanol and piperidine derivatives is its' reduced hydrogen bond dissociation energy and energy gap.

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生物基，高效：用于增强聚丙烯抗热老化和光氧化老化性能的卡丹醇-哌啶衍生物

生物基抗氧化剂因其可持续性和环境效益而备受关注。在本研究中，我们利用氢化的卡旦醇（HC）和哌啶衍生物设计并合成了三种卡旦醇-哌啶衍生物（HSs），以改善聚丙烯（PP）的老化抑制性能。这些生物基抗氧化剂旨在作为传统合成抗氧化剂的环保型替代品。研究人员全面评估了这些合成代谢物对聚丙烯热稳定性、热氧化稳定性和光稳定性的影响。结果表明，在与 2,2-二苯基-1-苦基肼自由基作用 5 小时后，与 HC 相比，HS 的自由基清除效率显著提高了 5 倍以上。此外，与原始 PP 相比，添加 HSs 能显著增加氧化诱导时间和初始氧化温度。经过光氧化老化和热氧化老化后，添加了 HS 的 PP 的断裂伸长率保持率明显提高，分别达到 72% 和 69% 以上。通过与物理混合物的比较和密度泛函理论计算，提出了一种分子内协同机制。酚哌啶分子内协同作用可能是抑制聚丙烯老化的主要原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.