文献类型：期刊文献

英文题名：Eco-Friendly Epoxy-Terminated Polyurethane-Modified Epoxy Resin with Efficient Enhancement in Toughness

作者：Zhang, Kun[1] Huang, Jinrui[1] Wang, Yigang[1] Li, Wenbin[1] Nie, Xiaoan[1]

第一作者：Zhang, Kun

通信作者：Huang, JR[1];Nie, XA[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod,Natl Forestry & Grasslan, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Natl Engn Res Ctr Low Carbon Proc & Utilizat Fores, Nanjing 210042, Jiangsu, Peoples R China

年份：2023

卷号：15

期号：13

外文期刊名：POLYMERS

收录：;EI(收录号：20232914404711);Scopus(收录号：2-s2.0-85164661398);WOS:【SCI-EXPANDED(收录号:WOS:001028622000001)】；

基金：This work was financially supported by the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2020QB006).

语种：英文

外文关键词：epoxy resin; polyurethane; toughness; mechanical properties

摘要：Polyurethane is widely used to toughen epoxy resins due to its excellent comprehensive properties and compatibility. However, some demerits of polyurethanes limit their applications, such as the harsh storage condition of isocyanate-terminated polyurethane (ITPU), the limited amount of ITPU in epoxy resin, and using solvents during the preparation of polyurethane-modified epoxy resins. To address these issues, in this study, we reported a facile and green approach for preparing epoxy-terminated polyurethane (EPU)-modified epoxy resins with different EPU contents. It was found that the toughness of the epoxy resin was significantly improved after the addition of EPU. When the EPU content was 30 wt%, the elongation at break and toughness were improved by 358.36% and 73.56%, respectively. In comparison, the toughening effect of EPU outperformed that of ITPU. Moreover, the high content of EPU did not significantly decrease the glass transition temperature and had little effect on the thermal stability of the epoxy resin.