| Summary: | 碩士 === 國立臺北科技大學 === 有機高分子研究所 === 99 === This study is based on high-density polyethylene (HDPE)、low density polyethylene (LDPE), linear low density polyethylene (LLDPE: C4、C6 and C8) as the polymer matrix, use of polymer mixing technology, the substrate with carbon black(model 600JD) using plastic spectrometer (PLASTOGRAPH) polymer in the molten state to a uniform mixing, by blending carbon black，the conductive path formed within composite materials, the polymer conductivity at room temperature to achieve results, to investigate the crystallization of polymer positive temperature coefficient of its (Postitive Temperature coefficient, PTC) effect of positive temperature coefficient (PTC) effect is increased when the composite material as the temperature reaches the melting point of polymer matrix, resistance of the composites increased rapidly, insulating state to form a high impedance. PTC effect can be applied to use its current protection or thermal protection devices.
This study the incorporation of different type of polyethylene and carbon black in different proportions factors, to observe its effect and the PTC composite of crystalline. With higt resistance meter、Diffeerential Scanning Calorimeter (DSC) and X-ray diffraction (XRD) equipment to analyze the conductivity of conductive composite materials、crystalline nature.
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