Jin Han Song, Seung-Mo Hong, Seok Kyu Park, Hyeok Ki Kwon, Seok-Ho Hwang, Jong-Min Oh, Sang-Mo Koo, Giwon Lee, Chulhwan Park
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Synthesis and characterization of hyperbranched thiol hardener and their curing behavior in thiol–epoxy
Hyperbranched thiol (Hyperbranched mercaptopropionate, HBMP) was synthesized using a commercially available hydroxyl-terminal hyperbranched oligomer and 3-mercaptopropionic acid applying a low-temperature esterification reaction. The chemical structure and molecular weight analysis of synthesized HBMP were investigated by Fourier transform infrared spectroscopy (FT-IR) and gel permeation chromatography (GPC). The synthesized HBMP was analyzed with curing kinetics, thermal/mechanical properties, and adhesion trait with bisphenol-A-type epoxy resin compared to pentaerythritol tetra-mercaptopropionate (PETMP). The curing kinetics between HBMP and epoxy resin required higher activation energy compared to PETMP case. In addition, it was confirmed that as the content of HBMP increases, the thermal and mechanical properties decrease, but the adhesion property was greatly improved. These results indicate that incorporating hyperbranched thiol in epoxy resin is an efficient method to utilize the material as an adhesive layer.
Graphical abstract
Synthesis procedure of HBMP reaction with BoltornTM P1000 and 3-MPA.
期刊介绍：
Original research on all aspects of polymer science, engineering and technology, including nanotechnology
Presents original research articles on all aspects of polymer science, engineering and technology
Coverage extends to such topics as nanotechnology, biotechnology and information technology
The English-language journal of the Polymer Society of Korea
Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.
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