文献类型：期刊文献

英文题名：Study on Foaming Behavior of Block Copolymer/Inorganic Particle Co-Construction of Toughened Epoxy Resin Foams

作者：Zhou, Chun Yu, Caili Yang, Le Liu, Wei Jiang, Tuanhui Zeng, Xiangbu Shen, Kuanchun Jin, Bo He, Li

第一作者：Zhou, Chun

机构：[1] School of Materials and Energy Engineering, Guizhou Institute of Technology, Guizhou, Guiyang, 550003, China; [2] National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guizhou, Guiyang, 550022, China; [3] Guizhou Yong Hong Aviation Machinery Co.LTD, Guiyang, 550003, China; [4] Guizhou Honglin Aero ENGINE CONTROL Technology Co.LTD, Guiyang, 550009, China

第一机构：贵州理工学院

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240254736)

语种：英文

外文关键词：Agglomeration - Block copolymers - Brittleness - Calcium silicate - Cells - Cytology - Fracture mechanics - Plasticity - Repair - Silicates

摘要：Thermosetting epoxy resin (EP) based foams has the characteristics of low toughness and brittleness, which limit its application range. In current research, inorganic particles are commonly utilized as heterogeneous nucleating agents to enhance foaming quality and EP toughness. However, the increasing inorganic particle content usually leads to particle agglomeration, which negatively impacts foaming quality and reduces EP performance. Block copolymers are employed as toughening materials for EP and they appear as liquid to effectively mitigate agglomeration when it was mixed with EP. In this study, modified calcium silicate particles (MCS) were used as anchor points to induce the distribution of block copolymers (P-F68) to improve EP toughness and effectively enhance cell nucleation, thus improving cell quality and preparation of the EP/MCS/P-F68 foams. The results showed that EP foams obtained excellent cell structure and very small foam density (0.256 g/cm3) at the P-F68 content of 10 wt%. The continuous increase of P-F68 content would lead to the thickening of cell wall and the increase of cell size. The increase of chemical foaming agent (CFA) content can effectively reduce the density of EP foams and maintain good cell structure and cell size by PF-68. Simultaneously, the core-shell structure formed by P-F68 in EP effectively enhanced the toughness of EP foams and mitigated its brittleness, offering crucial theoretical guidance for toughening and regulating the cell structure of EP foams. ? 2024, The Authors. All rights reserved.