摘要
本文对聚乙烯（ＰＥ）－乙烯醋酸乙烯共聚物（ＥＶＡ）－炭黑（ＣＢ）复合材料的电阻－电压特性进行了研究。结果表明，这种材料在低于２．５Ｖ电压下，电阻是常数。在５～１５Ｖ的电压范围内，Ｒ－Ｕ符合关系式Ｒ＝Ａｎ－１Ｕ（１－Ｂ）。温度低于ＥＶＡ熔点时，热处理可以扩大材料欧姆特性的电压范围，降低Ｂ值和电阻。热处理温度越高，处理时间越长，材料的ＡＮ－１、Ｂ值越小。炭黑含量低，测试温度高，材料的电阻、Ｂ值大。ＥＶＡ的存在使Ｂ值增大。
Abstract The R-U characteristics of composites of carbon black loaded in PE-EVA matrix were studied. It was found that the resistance of the sample was a constant up to applied voltage of 2. 5V. Between 5～15V the R-U behavior could be expressed by equation: R=An-1 ·U(1-B). As a result of heat treatmeat below the M P. of EVA, the Voltage range was enlarged and AN-1 and B decreased. The greater the temperature of heat treatmentand the longer its time, the smaller its resistance and coefficient B. The resistance and B increased when reducing contain of carbonn dack and elevahng experiment temperature. EVA increased coeffcient B.
出处
《塑料》
CAS
CSCD
1995年第6期11-14,共4页
Plastics
