| 초록 |
Poly(lactic acid) (PLA) is one of the most promising biopolymers derived from renewable resources. To enhance the physical properties of PLA, PLA-based composites reinforced with various organic or inorganic fillers have been investigated extensively. Aramid fibers, which are excellent organic fibers with low density, low thermal conductivity and high mechanical strength, have been adopted as reinforcements. In this study, aramid scrap powder (ASP) was prepared by milling to recycle the high strength aramid fibers and utilized as a reinforcing filler for PLA. A series of PLA/ASP composites was fabricated by master-batching and melt-compounding. The morphology, rheological, thermal and mechanical properties of the composites were investigated with aids of FT-IR, SEM, Rheometer, DSC and DMA. The effects of ASP on the morphology, thermal and mechanical properties of PLA composites were analyzed by taking account of the ASP content and the molecular interaction between ASP and PLA. |
