活性改性剂合成及其对环氧胶黏剂力学与界面粘接性能的影响

doi:10.11896/cldb.22120199

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Abstract Considering the workability, mechanical and bonding properties of epoxy adhesives, four prepolymers (PPM) with low epoxy value and high hydroxyl content were prepared using trimethylolpropane triglycidyl ether (TMPGE) and 1, 4-butanediol (BDO) by tuning the molar ratio and reaction time. The PPM was characterized by¹H-NMR, hydrochloric acid-acetone method, and gel permeation chromatography (GPC). The effect of PPM on the workability, mechanical, bonding properties and the surface properties of the modified epoxy adhesives was further investigated. The results showed that prolonging the reaction time and increasing the BDO amount resulted in larger molecular weight and lower epoxy value of the products. After PPM modification, the exothermic temperature of the adhesives was reduced, the operability time was increased, and the ductility of the cured epoxy was significantly increased. PPM modification also resulted in a lower contact angle and a higher polar component of the cured epoxy surface. XPS analysis showed that the PPM significantly increased the hydroxyl content of the cured epoxy. The bond strength of the adhesive to the wet mortar matrix increases more than double by PPM addition.

Key words： epoxy adhesives operability time crack repair grouting material interface bonding

Published: Online: 2024-06-25

CLC number:

TU58+1.3

Fund:Science and Technology Research and Development Program Project of China Railway Group Limited (Major Special Project 2020-Special-02) and Open Foundation of National Engineering Laboratory for High Speed Railway Construction (HSR202013).

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	YUAN Qiang
	WANG Zan
	YAO Hao
	HUANG Ju
	ZUO Shenghao
	HUANG Hai

Cite this article:

YUAN Qiang,WANG Zan,YAO Hao, et al. Synthesis of Reactive Modifiers and Their Effects on the Mechanical and Interfacial Bonding Properties of Epoxy Adhesives[J]. Materials Reports, 2024, 38(11): 22120199-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22120199 OR http://www.mater-rep.com/EN/Y2024/V38/I11/22120199

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