-MWNTs复合材料体系PTC效应HDPECB.PDF

HDPE/ CB-MWNTs PT C 43 HDPE/ CB-MWNTs PTC PT C Effect of HDPE/ CB-WMNT s Composites , , ( , 435002) YI H -i yang, CHEN Fang, LUO Si-qing ( College of Chemistry and Environmental Engineering, H bei Normal U niversity, H angshi 435002, H bei, China) : / -( PT C) , H DPE/ CB-MWNTs MWNT s 1% ( , ) PT C 83, 12 m; MWNTs 3% PT C 3, SEM CB MWNTs H DPE/ CB-MWNTs PT C MWNT s : ; ; : TB34; T B33 : A : 1001-4381(2008) 10-0043-03 Abstract: The positive temperat re coefficient effect and mechanical of a high-density polyethylene / carbon black-m lti-w alled carbon nanot be composites are reported. T he res lts show ed that, the PT C intensity of HDPE/ CB-MWNTs composites w ith 1%( mass fraction, the same below) MWNT s is 83, and the room temperat re resistance is only 12 m; b t for the 3% MWNT s, the composites PT C intensity red ced to less than 3 rapidly, and the room temperat re resistance is little changed. SEM show ed the cond ctive filler CB or MWNT s in composites is evenly distrib ted. T he reasons of PT C intensity of HDPE/ CB-MWNT s composite changes w ith the content of MWNT s w ere disc ssed. Key words: high-density polyethylene; composite; positive temperat re coefficient effect [ 7] PT C ( Positive T emperat re Coeff-i ( HDPE) cient, PT C) ( CB) , [ 1- 3] , ( MWNTs) , HDPE/ CB-MWNTs PT C PTC NT C PT C , , 1 ( ) 11 [ 4, 5] ( HDPE) , 5