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http://dx.doi.org/10.17702/jai.2022.23.2.44

Synthesis and characterization of PPG-based urethane-modified epoxy resin for enhancing impact resistance of epoxy composite resin  

Hwang, Chiwon (Center for Advanxed Specialty Chemicals, Korea Research Institute of Chemical Technology)
Jeon, Jaehee (Center for Advanxed Specialty Chemicals, Korea Research Institute of Chemical Technology)
Ahn, Dowon (Center for Advanxed Specialty Chemicals, Korea Research Institute of Chemical Technology)
Yu, Youngchang (Center for Advanxed Specialty Chemicals, Korea Research Institute of Chemical Technology)
Lee, Wonjoo (Center for Advanxed Specialty Chemicals, Korea Research Institute of Chemical Technology)
Publication Information
Journal of Adhesion and Interface / v.23, no.2, 2022 , pp. 44-52 More about this Journal
Abstract
Epoxy resin has the disadvantage of being easily destroyed by instantaneous impact due to its high crosslinking density despite its high glass transition temperature (Tg) and excellent properties. To compensate for this, in this study, polyol was synthesized by ring opening polymerization of propylene glycol (PPG) diamine, Jeffamine D 2000 and propylene carbonate, and urethane modified epoxy was synthesized using this. The properties of the synthesized urethane modified epoxy were confirmed by FT-IR, H-NMR. To confirm the degree of improvement in impact resistance as an adhesive, a urethane modified epoxy adhesive was prepared by mixing a digylcidyl ether bisphenol A (DGEBA) with curing agent and curing accelerator. Properties test of urethane modified epoxy were shear strength, tensile strength and impact strength. As a result, excellent results were obtained in all test when the ratio of DGEBA : urethane modified epoxy was 8:2.
Keywords
Epoxy; Impact resistance; Urethane; Adhesive;
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