| 초록 |
The composites based on high density polyethylene (HDPE), fly ash organo-modified using stearic acid (MFA), ultraflow agent - stearate zinc salt (UTF) were fabricated by melt mixing method. The properties, morphology, flammability resistance of the materials were determined by TGA, DSC, SEM, tensile test, and UL 94 - test for flammability of plastic materials. The obtained results showed that thermal stability of HDPE/MFA/UTF composites was higher than HDPE and HDPE/MFA composites. The tensile strength, elongation at break and Young’s modulus of the composites after thermal aging test had a tendency to reduce with increasing the UTF contents. The retention of tensile strength and Young’s modulus of HDPE/MFA/UTF composites was larger than that of HDPE/MFA composite while the elongation at break of HDPE/MFA/UTF composites was less than that of HDPE/MFA composite. The data of accelerated weathering test indicated that the tensile strength, elongation at break and Young’s modulus of HDPE/MFA/UTF composites after 168 hour accelerated weathering test were increased much higher than those of HDPE/MFA composites. These composites were applied effectively to fabricate corrugated pipes using industry fields (electric, telecommunication, building, etc). The suitable content of composites as follows: 10 wt.% MFA, 2 wt.% UTF (in comparison with HDPE weight). |
