The process of curing epoxy–amine resins with a composition gradient in thick-walled cylindrical products

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-03-10 DOI:10.1007/s10853-025-10748-2

O. L. Khamidullin, K. A. Andrianova, V. S. Nikitin, L. M. Amirova

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Abstract

The idea of creating an epoxy-based gradient composition with hardeners of varying activities was proposed to control the exothermic effect during the curing process. Both resin and hardeners in powder form were selected to create a composition appropriate for the production of large-scale products. By modeling the thermal balance in Thermal Simulations software (Netzsch) based on data obtained from Thermokinetics 3 (Netzsch), a comparative analysis of temperature fields in thick-walled polymer samples of non-gradient and gradient compositions was carried out. A single-stage constant heating rate mode was developed to create a controlled gradient of the resin conversion from the inner layers of the part to the outer layers. The polymerization front is created by a certain ratio of hardeners with different reactivities in the layers of the matrix. The use of this method can lead to a reduction in the curing time, the prevention of overheating and a decrease in the residual stresses in the composite part.

Graphical abstract

Abstract Image

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在厚壁圆柱形产品中具有组成梯度的环氧胺树脂的固化过程

提出了用不同活性的硬化剂创建环氧基梯度组合物的想法，以控制固化过程中的放热效应。选择了粉末形式的树脂和硬化剂，以创建适合大规模产品生产的组合物。基于Thermokinetics 3 （Netzsch）获得的数据，通过热模拟软件（Netzsch）对热平衡进行建模，对非梯度和梯度组成的厚壁聚合物样品的温度场进行了对比分析。开发了一种单阶段恒定加热速率模式，以创建从零件内层到外层的树脂转换的可控梯度。聚合前沿是由一定比例的具有不同反应性的硬化剂在基体层中产生的。使用这种方法可以减少固化时间，防止过热，减少复合材料零件的残余应力。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.