Enhancing mechanical properties of polyvinyl chloride: Novel organic-modified cinnamate-intercalated calcium aluminum hydrotalcite as a high-efficiency thermal stabilizer

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Journal of Vinyl & Additive Technology Pub Date : 2024-04-30 DOI:10.1002/vnl.22111

Xue Mei, Pingping Jiang, Pingbo Zhang, Zhixuan Cui, Xiaoyuan Zhu, Shijun Chen, Xunxun Sheng, Jingang Gao, Hang Gao

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引用次数: 0

Abstract

To make the hydrotalcite uniformly dispersed in polyvinyl chloride (PVC) and enhance its thermal stability, cinnamate-intercalated calcium aluminum hydrotalcite (CaAl-cinnamate-LDHs) underwent organic modification with cetyltrimethylammonium bromide/sodium dodecyl sulfate/polyethylene glycol (CTAB/SDS/PEG). The structures of modified hydrotalcite were characterized using x-ray diffractometer, scanning electron microscope, particle size analysis, and water contact angle test. The thermal stability was assessed through thermal aging oven experiment, Congo Red experiment, and thermogravimetric experiment, revealing their exceptional performance. Simultaneously, the synergistic effect of PEG-LDHs with auxiliary thermal stabilizers was examined, with epoxy soybean oil proving to be the most effective, which made the PVC sample incompletely black within 120 min. Mechanical properties and dynamic thermomechanical analysis indicated that the overall mechanical characteristics of the PVC samples with modified hydrotalcite were significantly superior to the unmodified CaAl-cinnamate-LDHs. Additionally, the optical performance test demonstrated excellent transparency in the PEG-LDHs/PVC sample. Through analyzing the thermal stability mechanism, it was indicated that hydrotalcite effectively absorbed HCl. Furthermore, the combination of PEG-LDHs and ESO replaced unstable Cl atoms and reacted with conjugated double bonds, thereby reducing the aging and discoloration of PVC.

Highlights

The modified hydrotalcite preparation process was simple and easy to operate.
The CTAB/SDS/PEG-LDHs/PVC samples exhibited excellent thermal stability.
Mechanical properties of the PVC samples with modified hydrotalcite were significantly superior to the unmodified CaAl-cinnamate-LDHs.

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增强聚氯乙烯的机械性能：作为高效热稳定剂的新型有机改性肉桂酸盐插层铝氢铝酸钙

为使水滑石均匀分散在聚氯乙烯（PVC）中并增强其热稳定性，肉桂酸盐插层铝水滑石钙（CaAl-cinnamate-LDHs）用十六烷基三甲基溴化铵/十二烷基硫酸钠/聚乙二醇（CTAB/SDS/PEG）进行了有机改性。使用 X 射线衍射仪、扫描电子显微镜、粒度分析和水接触角测试对改性水滑石的结构进行了表征。通过热老化炉实验、刚果红实验和热重实验对其热稳定性进行了评估，结果表明其性能优异。同时，还考察了 PEG-LDHs 与辅助热稳定剂的协同效应，其中环氧大豆油的效果最佳，可使 PVC 样品在 120 分钟内完全变黑。力学性能和动态热力学分析表明，改性氢铝酸盐的 PVC 样品的整体力学性能明显优于未改性的 CaAl-肉桂酸盐-LDHs。此外，光学性能测试表明 PEG-LDHs/PVC 样品具有出色的透明度。热稳定性机理分析表明，水滑石能有效吸收 HCl。此外，PEG-LDHs 和 ESO 的组合取代了不稳定的 Cl 原子，并与共轭双键发生反应，从而减少了 PVC 的老化和变色。CTAB/SDS/PEG-LDHs/PVC 样品具有优异的热稳定性。含有改性氢铝酸盐的 PVC 样品的机械性能明显优于未改性的 CaAl-cinnamate-LDHs 样品。

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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.