Shrinkage behavior of Araldite epoxy resin using Archimedes' principle
Shrinkage behavior of Araldite epoxy resin using Archimedes' principle
复制标题
利用阿基米德原理研究 Araldite 环氧树脂的收缩行为
DOI：
10.1016/j.polymertesting.2018.03.031
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发表时间：
2018
期刊：
影响因子：
5.1
通讯作者：
K. Bode
中科院分区：
文献类型：
--
作者：
C. Leistner;S. Hartmann;J. Wittrock;K. Bode
环氧树脂固化过程中的体积行为（化学收缩）是连续介质力学中固化过程本构模型的基本要求。本文介绍了一种特殊的热固化环氧树脂固化时的收缩测量。该测量方法基于阿基米德原理，适用于高达140° C的高温，并配有精密刻度。此外，刻度和样品之间的磁悬浮确保了样品的恒定浸入深度，以避免负面影响。除了收缩测量外，还使用化学稳定的环氧树脂混合物测量未固化环氧树脂在整个温度范围内的热膨胀。基于变形的精确描述，我们引入了一个模型的热化学变形，它是可能的分离热化学变形。这是在几乎无压力的条件下进行的，以避免关于固化动力学的任何机械变形。利用这些信息，我们利用最常见的固化模型Kamal和Sourour的固化程度的演变，使DSC测量可以规避。两种方法进行了比较。
Abstract Knowledge about the volumetric behavior of epoxy resins (chemical shrinkage) during curing is a basic requirement for constitutive modeling of curing processes in Continuum Mechanics. This paper covers shrinkage measurements while a special hot anhydrid-curing epoxy resin cures. The measuring method is based on Archimedes' principle also for elevated temperatures up to 140° C, where a precision scale is drawn on. Moreover, a magnetic suspension between the scale and the sample ensures a constant immersion depth of the sample to avoid negative side effects. Apart from shrinkage measurements, the thermal expansion of the uncured epoxy resin over a comprehensive temperature range is measured using a chemically stable epoxy mixture. Based on an exact description of the deformation, we introduce a model for the thermo-chemical deformations, where it is possible to separate thermal from chemical deformations. This is done under nearly pressure-free conditions to avoid any mechanical deformations regarding the curing kinetics. Using this information, we draw on the most common curing model of Kamal and Sourour to the resulting evolution of the degree of cure, so that DSC measurements can be circumvented. Both methods are compared.
粘合压电金属复合材料中粘合剂固化过程的建模和仿真
影响因子：
4.1
作者：
Landgraf R;Rudolph M;Scherzer R;Ihlemann J
通讯作者：
Ihlemann J