| 초록 |
Biodegradable poly(lactic acid) (PLA), which can be produced by fermenting lactic acid containing in annually renewable resources, is one of eco-friendly synthetic polymers. Due to its good mechanical properties as well as easy processability, up to now PLA is one of promising biodegradable polymers to apply to plastic industries as replacement for non-degradable petroleum-based synthetic polymers. In spite of these advantages, it has still limitations to the process of manufacturing PLA molded articles and composite materials. It is because of the low heat resistance and low melt strength, which are caused from the slow crystallization rate. In this study, we selected the microcrystalline cellulose (MCC), one of abundant biodegradable material in nature, which was used as reinforcing filler in PLA-based composite. To improve the miscibility of hydrophilic MCC and hydrophobic PLA, we chemically modified the MCC surface using polymeric (diphenylmethane diisocyanate) (pMDI). |
