聚乙烯類正溫度係數複合材料之製備及研究

The manufacture and study of Polyethylene positive temperature coefficient composites

莊景隆(Ching-Lung Chuang)

指導教授 ： 芮祥鵬

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00623

摘要

本篇研究是以高密度聚乙烯(HDPE)、低密度聚乙烯(LDPE)、線型低密度聚乙烯 (LLDPE:C4、C6和C8)為高分子基材，使用高分子混煉技術，將基材與碳黑(型號600JD)利用塑譜儀（PLASTOGRAPH）使高分子在熔融狀態下進行均勻混煉，藉由碳黑的摻合，在複合材料內部形成導電路徑，使高分子材料在室溫下達到導電效果。藉此探討結晶性對高分子其正溫度係數(Postitive Temperature Coefficient，PTC)效應之影響。正溫度係數(PTC)效應即是當複合材料隨著溫度上升達到高分子基材的熔點時，導致複合材料的電阻值急遽上升，形成高阻抗絕緣狀態。可利用其PTC效應應用在電流保護或是過熱保護裝置上。
本研究中利用不同種類的聚乙烯以及摻入不同比例的碳黑等因素，來觀察對其複合材料之PTC效應及結晶性的影響。藉由高阻計、微分熱掃瞄卡計（DSC）及X光繞射（XRD）等儀器來分析複合導電材料之導電、結晶等性質。

關鍵字

高密度聚乙烯 ； 低密度聚乙烯 ； 線型低密度聚乙烯 ； 正溫度係數 ； 碳黑

並列摘要

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.

並列關鍵字

HDPE ； LDPE ； LLDPE ； Postitive Temperature Coefficient ； carbon black

參考文獻

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