Dynamic Laser Speckle Imaging as a Nondestructive Method for Tracking the Dynamics in Slow Curing Epoxy Resin

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
S. H. Keerthana, A. Mujeeb, P. Radhakrishnan
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引用次数: 0

Abstract

Dynamic laser speckle imaging (DLSI) is an emerging nondestructive optical method used for the characterization of turbid materials. The microscopic dynamics of the turbid materials can be quantified using this imaging technique with high spatio temporal resolution. In recent decades, epoxy resins became indispensable for industries due to its fascinating mechanical properties, high chemical resistance, etc. The physical, mechanical and electrical characteristics of epoxy resins depend on the curing process. However, the techniques for monitoring the microscopic dynamics of the curing process are in-sufficient. Hence this work reports the application of dynamic laser speckle imaging to monitor the curing stages of Araldite, a 2 part epoxy resin. The computational methods incorporated with the technique include cross-correlation, inertia moment, Fujii method, etc. Conventional characterization techniques such as Differential Scanning Calorimetry and Fourier Transform Infrared Spectroscopy were also employed to confirm the results. The experimental results were also confirmed using the theoretical analysis.

Abstract Image

Abstract Image

动态激光斑点成像是跟踪慢固化环氧树脂动态的一种无损方法
摘要 动态激光斑点成像(DLSI)是一种新兴的无损光学方法,用于表征浑浊材料。利用这种高时空分辨率的成像技术,可以对浑浊材料的微观动态进行量化。近几十年来,环氧树脂因其迷人的机械性能和高耐化学腐蚀性等特点成为工业中不可或缺的材料。环氧树脂的物理、机械和电气特性取决于固化过程。然而,对固化过程的微观动态监测技术还不够充分。因此,这项工作报告了应用动态激光斑点成像技术监测 Araldite(一种双组分环氧树脂)固化阶段的情况。该技术采用的计算方法包括交叉相关法、惯性矩法、藤井法等。此外,还采用了差示扫描量热法和傅立叶变换红外光谱法等常规表征技术来确认结果。理论分析也证实了实验结果。
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来源期刊
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing 工程技术-材料科学:表征与测试
CiteScore
1.60
自引率
44.40%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).
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