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首页> 外文期刊>Journal of Applied Polymer Science >Epoxy adhesive with high underwater adhesion and stability based on low viscosity modified Mannich bases
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Epoxy adhesive with high underwater adhesion and stability based on low viscosity modified Mannich bases

机译：环氧粘合剂具有高水下粘附和基于低粘度的稳定性改性Mannich碱基

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摘要

A series of Mannich base curing agents were synthesized by using different structured phenols and amines. The phenols were phenol, o-cresol, and nonylphenol, and the amines were diethylenetriamine, m-xylylenediamine, and JEFFAMINE D230 polyetheramine. The chemical structures of Mannich bases were confirmed by H-1 nuclear magnetic resonance and Fourier transform infrared spectroscopy. The curing agents had low viscosities in the range of 19.9 to 1549 mPa s. The curing behavior of diglycidyl ether of bisphenol A with these curing agents was studied by differential scanning calorimetry. The mechanical properties and thermal properties of the cured epoxies were also investigated and compared. Lap-shear adhesion in air and underwater was studied by using stainless steel substrates, and the adhesion after ageing in hot water (80 degrees C) was also investigated. Adhesive cured with phenol modified m-xylylenediamine showed the highest underwater adhesion around 5.9 MPa, which was comparable to other ones tested in air. In addition, the high adhesive strength was kept after ageing in hot water for 7 days. The structural influence of the curing agents on mechanical property and adhesive performances were discussed. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45688.
机译：通过使用不同的结构酚和胺来合成一系列曼尼希碱固化剂。酚是苯酚，O-甲酚和壬基酚，胺是二亚乙基三胺，M-Xylylendi金属和Jeffamine D230聚醚胺。 H-1核磁共振和傅里叶变换红外光谱证实了曼尼希碱的化学结构。固化剂在19.9至1549MPa S的范围内具有低粘度。通过差示扫描量热法研究了双酚A与这些固化剂的二甲醇A的固化行为。还研究了固化环氧树脂的机械性能和热性质。通过使用不锈钢基材研究了空气和水下的搭接剪切粘附，还研究了热水中老化后的粘合（80℃）。用苯酚改性的M-Xylylendi金刚胺固化的粘合剂呈现出约5.9MPa的最高水下粘附，其与空气中测试的其他粘合剂相当。此外，在热水中老化7天后保持高粘合强度。讨论了固化剂对机械性能和粘合性能的结构影响。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45688。

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