電漿處理與添加劑對高密度聚乙烯/碳黑複合材料PTC與NTC行為影響之研究

Effect of Plasma Treatment and dditives on PTC and NTC Behavior of High Density Polyethylene/Carbon black composites

陳虹伶(Hung-Ling Chen)

指導教授 ： 黃繼遠

大同大學/工程學院/材料工程學系所/碩士(2004年)

摘要

本研究探討碳黑加量、電漿處理、60Coγ-ray輻射劑量對高密度聚乙烯/碳黑複合材料之正溫度係數（Positive Temperature Coefficient, PTC）與負溫度係數（Negative Temperature Coefficient, NTC）效應的影響。另一方面也研究了高密度聚乙烯/碳黑材料的表面型態、斷面型態以及動態機械性質。研究中發現，電漿處理能輕微的消除複合材料NTC效應，而添加DCP與使用60Co γ-ray輻射交聯都是提升PTC效應的有效方法，且利用動態機械分析觀察也得到相同的結果。當複合材料組成為PHDPE(40W,30min)/CB(40wt%)DCP(2phr)/5M-rad時， PTC強度可達到7個Order，並且經過了10次的熱循環測試，此組成材料具有相當好的回覆性。而PHDPE(40W,30min)/CB(40wt%)/ DCP(2phr)/10M-rad的組成PTC強度可達到8個Order。在經濟上的考量下，這二組材料都可被用來當作PTC元件。

關鍵字

負溫度係數 ； 正溫度係數 ； 電漿 ； 高密度聚乙烯 ； 碳黑

並列摘要

In this investigation, the effect of carbon black content, plasma treatment, 60Co γ-ray irradiate dose and additives on the positive temperature coefficient(PTC) behavior and negative temperature coefficient(NTC) behavior of high density polyethylene/carbon black(HDPE/CB) composites were studied. On the other hand, the surface morphology observations, the fracture surface morphology observations and the dynamic mechanical properties of HDPE/CB composite were also studied. It was found that the plasma pretreated was slightly decreased the NTC effect. On the other hand, adding dicumyl peroxide(DCP) and irradiation by 60Coγ-ray irradiation were good methods for increasing the PTC intensity. Used the dynamic mechanical analysis were processed the same result. In this investigation, the composites of PHDPE(40W.30min)/CB(40wt%)/DCP(2phr)/5M-rad possessed 7 order of PTC intensity. After 10 times thermal cycle measurement the reproducibility of PHDPE(40W.30min)/CB(40wt%)/
DCP(2phr)/5M-rad was very good. PHDPE(40W.30min)/CB(40wt%)/
DCP(2phr)/10M-rad possessed 8 order of PTC intensity. These two composites could be used PTC element under economical consideration.

並列關鍵字

carbon black ； HDPE ； NTC ； plasma ； PTC

參考文獻

2. Strumpler, R., Glatz-Reichenbach, J. J Electroceram, 3, p.929-946(1999).

6. Yu. G., Zhang, M. Q., Zeng, H. M., Hou, Y. H., Hou, Y. H., Zhang, H. B. Polym Eng Sci 39, p.1678–1688(1999).

11. B. Wessling, Synth. Met., 27, A83 (1988)

12. J. Meyer, polym. Eng. Sci., 13, 162 (1973)

13. Narkis M, Ram A, Stenin Z J.Appl Polym Sci 25:171(1980)