POSS-SH를 함유한 하이브리드 에폭시 수지를 이용한 고분자 시멘트모르타르 제조 및 분석 = Synthesis and Characterization of Polymer Cement Mortar Using HybridEpoxy Resin Containing Mercaptopropyl Polyhedral OligomericSilsesquioxane (POSS-SH)

다국어 초록 (Multilingual Abstract)

Polymer cement mortar containing a hybrid epoxy resin with a three-dimensional network structure was prepared by mixing a hybrid epoxy resin containing silica particles and POSS-SH and cement mortar in a water solvent. The hybridepoxy resin was synthesized using diglycidyl ether of bisphenol A (DGEBA), ethylene diamine (EDA) as a curing agent, silica particles as a filler, and POSS-SH as a curing accelerator. To increase the strength of the epoxy resin and the bonding force between cement, silica particles with the surface modified with –OH functional groups were used, and mercaptopropyl polyhedral oligomeric silsesquioxane (POSS-SH) with a silica core and eight SH functional groups was used to maximize the curing speed and improve strength of epoxy resin. The hybrid epoxy resin containing silica particles and POSS-SH had the best pencil hardness and thermal stability, and the structure and surface analysis of the hybrid epoxy resin were confirmed through fourier transform infrared (FTIR) and scanning electron microscopy (SEM) analysis. It was confirmed from data measuring the curing time according to the molar ratio of epoxy and a curing agent that the hybrid epoxy with the best mixing stability with cement mortar is a 1:1 combination of epoxy and a curing agent. This hybrid epoxy resin was mixed with mortar and water to make polymer cement mortar at room temperature. Due to the effect of silica particles and POSS-SH,a curing accelerator, the compressive strength of polymer cement mortar increased by more than two times compared to pure cement mortar, and the flexural strength also showed excellent results due to the influence of silica particles and epoxy resin.