| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 고분자 구조 및 물성 |
| 제목 | Improvement of Fracture Behaviors of Epoxy Resins Toughened with 2,5-Bis(4,4'-methylenedianiline)-1,4-benzoquinone |
| 초록 | Polyamine quinones have a great affinity toward metal and glass surfaces and are active enough to displace water from wet, rusted, and steel surfaces, due to chemisorption induced by the quinone and imino moieties.1,2 In this study, 2,5-bis(4,4'-methylenedianiline)-1,4-benzoquinone (BB) was synthesized by reaction of 4,4'-diamino diphenyl methane (DDM) and 1,4-benzoquinone. To evaluate the effect of BB content on the glass transition temperature (Tg) and crosslinking density (ρ) of cured epoxy resins, the storage modulus and loss factor measurements were conducted by using DMA. The mechanical properties for DGEBA/BB blends were determined in terms of the fracture toughness, impact strength, and adhesion strength measurements. As a result, the Tg and ρ values of the blends were systematically decreased with increasing the BB content. This was caused by the addition of BB into the epoxy resins and increases the free volume of the epoxy network, leading to an increase the motion of segments of the macromolecules in the blends. The KIC and impact strength values of the blends was increased with increasing the BB content. The adhesion strength values of the blends was also increased as the BB content increased. These results indicated that the addition of BB into the epoxy resins increases the free volume of the epoxy network and absorbs the impact energy, resulting in increasing the mechanical properties of the blends. Fig. 1. KIC values of DGEBA/BB blends as a function of BB content. References 1. M. Han and D. E. Nikles, J. Polym. Sci. Polym. Chem., 39, 4044 (2001). 2. R. A. Rushing, C. Thompson, and P. E. Cassidy, J. Appl. Polym. Sci., 53, 1211 (1994). |
| 저자 | 김범용, 이재락, 박수진 |
| 소속 | 한국화학(연) |
| 키워드 | Fracture behaviors; Epoxy resins; Polyamine quinones |
