Studies On The Relationship Of Mechanical Properties And Micro-morphology And Sub-cluster Parameters Of High Toughened And Strengthened PPO/PA6 Alloy

High-performance manufactured polymeric materials are mainly developing tendency in the field of polymeric materials' science and engineering lately. In order to obtain the high-strengthened and toughened PPO/PA6 alloy, a series of reinforced and toughened alloys of PPO/PA6 are prepared by reactive extrusion in twin screw extruder. The mechanical properties, rheological properties and micro-morphology of these alloys are investigated and the relationship between composition, structure and property are concluded. At the same time, many kinds of high-strengthened and toughened PPO/PA6 alloys are produced, and on the base of sub-cluster theory, the relationship between mechanical properties and sub-cluster parameters are put forward.Three toughening agent with reactive functional group, i.e., POE-g-MAH, POE-g-GMA and EPDM-g-MAH, are prepared by a melt grafting process on the condition of adding a few initiators, which are used to toughen PPO/PA6 blends compatibilized by maleic anhydride, respectively. The mechanical properties of varied blends and their phases have been investigated. The results have shown that EPDM-g-MAH has the best toughening effect on PPO/PA6 alloy. POE-g-MAH has very well toughening effect which is not up to the former's. Although POE-g-GMA can improve the toughness of alloy, its effect is not good as the above toughening agents. From their phase investigation, EPDM-g-MAH appearing galley style disperses into the matrix, which most benefit to toughen the system, while the reaction of GMA in POE-g-GMA to alkaii-group of PA6 is so strong that almost all POE-g-GMA disperse into the phase of PA6 and its toughening effect is not obvious. Toughening effect is related to both the type and quantity of toughening agent and the graft ratio of maleic anhydride which is not only too high but also too low.The impact strength of alloy has been greatly improved by adding elastomer. When 15% elastomer is added to the blends, the impact strength can increase to more than 500J/M, and meanwhile, which can lead to decrease the tensile strength. In order to improve the tensile strength of alloy, glass fiber, inorganic filler and nanoclaycomposite PA6 are used, respectively. The results have shown that...