Research of Thermal-Conductivity and Mechanical Properties of PPS Polymer Composites by Injection Molding

• Main Authors: Yu-Hao Hsu, 許育豪
• Other Authors: Chao-Chang A. Chen
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/23064565460684725517

碩士 === 國立臺灣科技大學 === 機械工程系 === 101 === This research is to investigate the effect of injection molding parameter on the mechanical properties and thermal properties for the thermal conductivity of Polyphenylene Sulfide (PPS) polymer compsites. Boron Nitride (BN) is used as an additives in this study and titanate coupling agent is adopted to improve the binding effect between the PPS and BN. Thermogravimetric analysis (TGA) instrument and Differential scanning calorimetry (DSC) are used to measure the thermal properties of PPS composites. Results of mechanical properties show that the tensile strength increases with the higher injection speed and the lower mold temperature. Simulation results of Moldex3D show that the highest shear stress occurs on the contact surface between mold and specimen. The BN can increase the Young’s modulus and increase 11% of thermal conductivity of PPS composite than those properties of the pure PPS. After in-mold annealing during cooling period, the hardness of PPS can improve as cooling time increasing. Finally, the porosity samples of PPS which fabricate by injection molding can obtain the most significant porosity with 25wt% CaSO4. The specimen treated by titanate coupling agent and sample with 5wt% CaSO4 can get the minimum dielectric constant. Result of this study can be applied on the heat dissipation unit of LED lamp or related products for high thermal property of polymer materials by injection molding.