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The current date is 2017-11-23
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URN etd-0714104-130701 Statistics This thesis had been viewed 1742 times. Download 8 times. Author Hung-Ling Chen Author's Email Address No Public. Department Materials Engineering Year 2003 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 127 Title Effect of Plasma Treatment and dditives on PTC and NTC Behavior of High Density Polyethylene/Carbon black composites Keyword PTC plasma NTC HDPE carbon black carbon black HDPE NTC plasma PTC Abstract 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.
Advisor Committee Chi-Yuan Huang - advisor
Files Date of Defense 2004-06-23 Date of Submission 2004-07-14