Materials and Polymer Chemistry

Won-Ji Lee has completed her graduation from Kyonggi University, South Korea.\r\n\r\nlwj3725@naver.com\r\n

Recently, there have been various studies on self-healing. Among them, there is a lot of research on reversible self-healing which can be repeated healing. In this study, we prepared the material having the self-healing ability and mechanical strength. First, the GO is modified using the Hummer\'s method. Thereafter, the maleimide group is then included in the GO using the urethane reaction. The GO containing maleimide group was analyzed using Fourier Transform Infrared Spectroscopy (FT-IR) and Thermo-Gravimetric Analysis (TGA). The GO containing the prepared maleimide group forms a film using Diels-Alder reaction. Then, the mechanical properties were measured using a Universal Testing Machine (UTM).

\r\nYoon-Seok Shin is an Associate Professor of the Department of Architectural Engineering at Kyonggi University, South Korea. He is conducting research on construction industry such as execution of building works and building equipment.\r\n\r\nshinys@kgu.ac.kr\r\n

Building materials consisted of combustible polymers are causing the spread of large-scale fire. Accordingly, many researches on flame retardant materials that can prevent the combustion of polymers have been conducted. So, we synthesized a Phosphorus-containing Flame Retardant (PFR) and prepared Flame Retarded Polylactide (FR-PLA) with different contents of PFR. Limiting Oxygen Index (LOI) and the vertical burning test (UL 94) were performed to evaluate the flame retardancy. The thermal degradation process was analyzed by TGA and real-time FTIR. With 3 wt.% loading of PFR, LOI increased 23% to 30%. Then the maximum-thermal degradation temperature increased. Additionally, to investigate the mechanical property and melting behavior, UTM and DSC were conducted. As a result, we confirmed that PFR have flame retardancy, thermal stability and processability for PLA.