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Preparation of thermal expandable epoxy resin and properties of foam sandwich composites formed by thermal expansion molding process
Polymer Composites ( IF 4.8 ) Pub Date : 2024-03-27 , DOI: 10.1002/pc.28345 Yinle Qin 1 , Zhonghao Mei 1 , Dongxu Kang 1 , Ziyao Peng 2 , Ziqian Geng 1 , Wei Min 1 , Muhuo Yu 1, 3 , Zeyu Sun 1
Polymer Composites ( IF 4.8 ) Pub Date : 2024-03-27 , DOI: 10.1002/pc.28345 Yinle Qin 1 , Zhonghao Mei 1 , Dongxu Kang 1 , Ziyao Peng 2 , Ziqian Geng 1 , Wei Min 1 , Muhuo Yu 1, 3 , Zeyu Sun 1
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Thermal expansion molding process (TEMP) is a sophisticated molding technique for creating complex sandwich composites. The core key of TEMP is a high-performance, thermally expandable resin film. In this study, the epoxy resin is used to create a specific crosslinking network that can provide the support force required for the stable molding of the vesicles during the expansion process of the foaming agent. The curing process of the resin was determined by analyzing the change in the exothermic amount of the epoxy resin during the curing process and the flow behavior of the resin. The pore size distribution of the epoxy foam was investigated, and the expansion force of the thermally expandable resin was tested. The TEMP molding process was compared with the vacuum bag press molding (VBPM) process. The TEMP molding technique increased tensile and compressive strength by about 25%, flexural strength by 34.5%, and shear strength by 54.5%. Finally, the section on microanalysis of the comparative materials and the short beam bending experiments of the sandwich structure provides a theoretical foundation for developing complicated sandwich structures.
中文翻译：
热膨胀环氧树脂的制备及热膨胀成型泡沫夹芯复合材料的性能
热膨胀成型工艺 (TEMP) 是一种用于制造复杂夹层复合材料的复杂成型技术。 TEMP的核心关键是高性能、热膨胀树脂薄膜。在这项研究中，环氧树脂被用来创建特定的交联网络，可以在发泡剂的膨胀过程中提供囊泡稳定成型所需的支撑力。通过分析环氧树脂在固化过程中放热量的变化和树脂的流动行为来确定树脂的固化过程。研究了环氧泡沫的孔径分布，并测试了热膨胀树脂的膨胀力。将 TEMP 成型工艺与真空袋压制成型 (VBPM) 工艺进行比较。 TEMP 成型技术将拉伸和压缩强度提高了约 25%，弯曲强度提高了 34.5%，剪切强度提高了 54.5%。最后，对比材料的微观分析和夹层结构的短梁弯曲实验为开发复杂的夹层结构提供了理论基础。
更新日期：2024-03-27
中文翻译：
热膨胀环氧树脂的制备及热膨胀成型泡沫夹芯复合材料的性能
热膨胀成型工艺 (TEMP) 是一种用于制造复杂夹层复合材料的复杂成型技术。 TEMP的核心关键是高性能、热膨胀树脂薄膜。在这项研究中，环氧树脂被用来创建特定的交联网络，可以在发泡剂的膨胀过程中提供囊泡稳定成型所需的支撑力。通过分析环氧树脂在固化过程中放热量的变化和树脂的流动行为来确定树脂的固化过程。研究了环氧泡沫的孔径分布，并测试了热膨胀树脂的膨胀力。将 TEMP 成型工艺与真空袋压制成型 (VBPM) 工艺进行比较。 TEMP 成型技术将拉伸和压缩强度提高了约 25%，弯曲强度提高了 34.5%，剪切强度提高了 54.5%。最后，对比材料的微观分析和夹层结构的短梁弯曲实验为开发复杂的夹层结构提供了理论基础。
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