| 초록 |
Because of its low cost, low density, good chemical resistance, and good processability, polypropylene (PP) is widely used in the plastic and fiber industries. However, unmodified polypropylene fiber cannot be dyed due to the high crystallinity and absence of dye sites in the molecular chain. In this study, poly(L-lactic acid) (PLA) was blended with PP during melt-spinning process to impart PP fiber dyeing property. Changes in thermal, mechanical, and dyeing properties of the blended PP fibers according to the amounts of PLA were examined. SEM analysis showed that PLA existed as beads in PP matrix, the number and size of which increased with increasing PLA content. PP/PLA blend fibers exhibited enhanced dyeing property, i.e., they could be dyed with disperse dyes. K/S values, indicating apparent dye absorption of the samples, increased with increasing PLA content in the blend fibers. |
