| Summary: | 碩士 === 逢甲大學 === 紡織工程所 === 98 === The purpose of this study is to improve the dyeing property of the polypropylene. Polypropylene and Polylactide were mixed at different weight ratios by brabender. PPgMA was used as the compatibilizer, and it intensified the interfacial interaction between PP/PLA. Adding nano-SiO2 to PP/PLA forms PP/PLA/SiO2 nano-blends. The dyeing property of PP/PLA and PP/PLA/SiO2 was discussed. The modified polypropylene was observed from its surface morphology and physical property using Fourier Transform Infrared Spectrometer (FTIR), Thermogravimetric Analysis (TGA), Dynamic Mechanical Analyzer (DMA), Differential Scanning Calorimetry (DSC), mechanical testing, Scanning Electron Microscope (SEM), dyeing property and decomposition of the test etc.
In consideration of FTIR, PPgMA would react with PLA theoretically, but there is only a small portion, it considered as a physical blending. From TGA, the initial decomposition temperature decreased as PLA increased and it reached the highest temperature as 2wt% of SiO2 was added into PP/PLA/SiO2. From DMA, it showed that the compatibility behaved the best as 5wt% of PPgMA of blends was added. Form DSC, as PLA content increased, the crystallization temperature of PP/PLA blends exhibited lower in temperature. However, the adding of SiO2 into PP/PLA/SiO2, the crystallization temperature was increased. From tensile test, the mechanical property of blends was increased as both of SiO2 was added. From SEM, the compatibility of PP/PLA adding PPgMA was improved, and SiO2 was dispersed better in blends. For dyeing property, the dyeability (K/S) of PP with PLA was enhanced. The colorfastness of blends was in level of 4～5. From the potential decomposition test it demonstrated that PP / PLA showed biodegradable.
|
|---|
