"Influence of Formaldehyde to Urea Mole Ratio of Urea-Formaldehyde Resin Adhesives to Their Thermal Cure Kinetics, Swelling Behavior, Micro-morphology and Penetration into Softwood Tissues : 포름알데히드/요소 몰비가 요소수지접착제의 열경화동력학, 팽윤거동, 미세형태 및 침엽수재 조직내 침투에 미치는 영향"