| Summary: | 碩士 === 東海大學 === 化學工程與材料工程學系 === 102 === Nylon 66 is one of the most widely used engineering plastics. In this study, PEI(Polyetherimide) and PES (Polyethersulfone), whose glass transition temperatures is well above 200℃, were employed to improve thermal stability of Nylon66. Due to the huge differences on both the molecular structures and the polarities between the two polymers, significant phase separations were observed, and a compatibilizer is needed. In PA66/PEI system, we therefore first developed a long epoxy chain grafted PA66 compatiblizer, and tested its effect on the compatibility of the blend. It was found that the compatiblizer can shrink the sizes of the discrete phase, and also change the glass transition temperatures of both phases in the blend. In PA66/PES system, PES was modified with DGEBA epoxy resin as compatibilizer. It was found that the sizes of descret phase of the blend was also greatly reduced. Shifting on the glass transition temperatures of both phases were obvious. Both the thermal and mechanical properties of the blend has been improved. The reactive compatiblization could be largely enhanced by adding a small amount of Maleic Anhydride.
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