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URN etd-0302104-164912 Statistics This thesis had been viewed 2144 times. Download 14 times. Author Chun-Fu Liu Author's Email Address email@example.com Department Materials Engineering Year 2003 Semester 1 Degree Master Type of Document Master's Thesis Language English Page Count 99 Title Effect of peroxides on the positive temperature coefficient behaviors of high density polyethylene/carbon black composites Keyword PTC plasma peroxide NTC HDPE CB CB HDPE NTC peroxide plasma PTC Abstract Abstract
In this investigation, the effect of particle size of HDPE, carbon black content, plasma treatment, 60Co ?-ray irradiate dose, different initiators and content 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 and dynamic mechanical properties of HDPE/CB composite were also studied. The low temperature (T＜ 120°C) resistance of composites decreased with decreasing the size of PE and using plasma to treat polyethylene. The cross-linking density of composite could be increased by using plasma to treat PE. In comparison with the initiators, AIBN, BPO and DCP, DCP has a superior efficiency on restraint NTC effect occurred. In this investigation, the composition which possessed the 7.8 order of PTC intensity was PHDPE(40W,3min)/CB(35wt%)/DCP(2phr) without using 60Coγ-ray to irradiate. The NTC effect of composites could be eliminated by adding initiator, plasma treatment and 60Co ?-ray irradiation.
Advisor Committee Chi-Yuan Huang - advisor
Jen-Tant Yeh - co-chair
Ming-Lih Roan - co-chair
Wen-Yen Chiang - co-chair
Files Date of Defense 2004-01-15 Date of Submission 2004-03-02