Structural control in the injection molding of MWCNTs/polyester composite

• Main Authors: Hu, Chih-Wei, 胡致偉
• Other Authors: Chen, Ren-Haw
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/22752062718868768112

碩士 === 國立交通大學 === 機械工程學系 === 99 === In recent years, the technology of nano-composite materials has been rapidly developed that blending carbon nanotubes into materials can compensate the physical property shortcomings of the original materials. In this study, under controlling electric and flow fields, making carbon nanotubes effectively generate alignment is expected to achieve the purpose of improving the physical property. This study used a variety of PET/MWCNTs with different ratios as the injection molding material. In the injection molding process, controlling parameters were used to implement the experiment, such as the electric field, mold temperature, the flow field, reaction time in the electric field and so on. The study results showed that: the higher mold temperature and the greater the electric field strength is, the better the fluidity of the materials in the filling process will be, so that the alignment effect is better. In the injection molding process, the alignment effect is better under the interaction between both the flow field and the electric field used simultaneously. The conductivity in the site near the gate is better but its hardness is lower. In this study, during the injection molding process, the electric field was effectively used as the external energy field to induce the alignment of the multi-walled carbon nanotubes, making the properties of the original materials promoted effectively.