The synthesis of tetrafunctional epoxy-modified silicone resins and the enhancement of toughness application at low temperature

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science Pub Date : 2025-02-13 DOI:10.1007/s10853-025-10689-w

Liangwei Lin, Shuangshuang Li, Changxin Cai, Min Zhong, Zhaoqun Pan

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Abstract

To strengthen the toughness of thermosetting resins under low temperatures, tetrafunctional epoxy-modified silicone resins (TESR-1/4/9) with different lengths of flexible chains were synthesized and served as tougheners for the epoxy system. The chemical structures of TESR-1/4/9 were determined via Fourier transform infrared spectroscopy as well as nuclear magnetic resonance (¹³C-NMR and ¹H-NMR). At room temperature, with 10 wt% of TESR-1, the elongation at break of the epoxy resin (17.67%) was added up to 68.93% in comparison with neat epoxy resin (10.46%). At −70 ℃, with the content of 5 wt% TESR-4, the value of the elongation at break (12.66%) was 37.31% higher than that of the neat epoxy (9.22%). A scanning electron microscope was utilized to observe the fractured surfaces of the resins to investigate the toughening behaviors of the tougheners (TESR-1/4/9). The dynamic mechanical analysis also demonstrated the improvement of the epoxy resins in toughness and good compatibility between TESR-1/4/9 and the epoxy matrix. These research findings can offer a new perspective for the enhancement of epoxy resins in low-temperature toughness.

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四官能环氧改性硅树脂的合成及低温应用韧性的增强

为了增强热固性树脂在低温下的韧性，合成了具有不同柔性链长度的四官能团环氧改性有机硅树脂（TESR-1/4/9）作为环氧体系的增韧剂。通过傅里叶变换红外光谱和核磁共振（13C-NMR和1H-NMR）测定了TESR-1/4/9的化学结构。室温下，当TESR-1含量为10 wt%时，环氧树脂的断裂伸长率（17.67%）比纯环氧树脂（10.46%）提高了68.93%。在−70℃下，当TESR-4含量为5 wt%时，其断裂伸长率（12.66%）比纯环氧树脂（9.22%）提高了37.31%。利用扫描电镜观察树脂断裂表面，研究增韧剂的增韧行为（TESR-1/4/9）。动态力学分析表明，TESR-1/4/9与环氧基体的相容性良好，环氧树脂的韧性得到改善。这些研究结果为提高环氧树脂的低温韧性提供了新的思路。图形抽象

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.