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Preparation of Polymer PTC Device using Liquid-Type Polymer/Carbon Black Composite 원문보기

  • 저자

    강영진

  • 학위수여기관

    호서대학교 일반대학원

  • 학위구분

    국내박사

  • 학과

    안전공학과

  • 지도교수

    강영구

  • 발행년도

    2014

  • 총페이지

    ix, 114 p.

  • 키워드

    PTC liquid polymer;

  • 언어

    eng

  • 원문 URL

    http://www.riss.kr/link?id=T13540892&outLink=K  

  • 초록

    Polymer PTC devices have a broad range of applications including overcurrent protection and thermistor. From the aspects of safety in particular, it is used as a critical device for preventing fire and electric shock due to overcurrent. Studies on polymer PTC devices have been continuously conducted from many years ago. In the past, studies focused on the change and principle of matrices and fillers. However, studies on alternative solutions to processes are insufficient. This study was conducted to improve energy efficiency and reduce the risks of fire and injuries to workers through replacement of the conventional thermal compression process with room temperature hardening and roller compression which is a green process. To apply the room temperature hardening process, a liquid polymer/carbon black conductive polymer composite was manufactured by adding carbon black which is mainly used as conductive filler by using 12 types of liquid polymers as major matrices. The raw materials were verified through FI-IR analysis for the 12 types of liquid polymers before manufacturing. Furthermore, the resistance variations of three types of carbon blacks were measured by filling content to select the best conductive filler for this experiment. After the device was manufactured with the conductive polymer composites, a system was built for checking the variations of resistivity over time to assess the PTC effect. Afterward, the PTC intensity and reproducibility of each sample were measured to understand their applicability to PTC device. As a result, relative good PTC performance was measured in five types of liquids. Then thermal analysis was performed for the five samples whose PTC performance was verified. Finally, SEM measurements were performed for morphology analysis of the three samples that had potential applicability to PTC device which confirmed the even distribution of the carbon black particles. The above findings presented the possibility of applying liquid polymers as the matrix of PTC device as well as the possibility of replacing the conventional manufacturing process.


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