摘要
研究了以ＨＤＰＥ为基体，工业炭黑（ＣＢ）为导电粒子的高分子复合材料的ＰＴＣ（正温度系数）导电行为。考察了炭黑及偶联剂种类、用量对高分子ＰＴＣ导电材料性能的影响，并探讨了偶联接技机理，从理论上对改性效果进行了分析。结果表明，对炭黑，尤其是槽法炭黑表面处理可显著提高复合材料的电导率及减小ＮＴＣ（负温度系数）效应；钛酸酯偶联剂具有最佳改性效果，可明显改善炭黑粒子分散状态，增强材料的ＰＴＣ效应，其最佳用量为１％质量份。
The PTC(positive temperature coefficient)conducting behavior of the polymer composites using HDPE as a ma- trix and industrial carbon black(CB)as conductive particles were studied. The effect of the type and contents of CB and coupling agents on the performances of the polymer based PTC conductive composite was investigated, and the mechanism of coupling graft was also analyzed. The results showed that the conductivity of the composites filled with carbon black, es- pecially carbon black treated with coupling agents has been remarkably increased and the NTC(negative temperature coef- ficient)phenomenon would decreased. The titanate coupling agents possesses the optimum effect, not only improving the dispersion behavior of carbon black particles, but also heightening the PTC effect. The optimum content of the agent was 1 percentage.
出处
《炭素》
2001年第3期16-22,共7页
Carbon
