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中文摘要：
摘要：通过熔融共混方法制备聚偏氟乙烯（PVDF）／炭黑（CB）／aS墨（GR）和PVDF／聚对苯二甲酸乙二醇酯（PET）／CB／GR复合材料，并采用差示扫描量热仪和电阻率测量仪对复合材料的熔融行为、结晶行为和导电性能进行了表征和分析。结果表明，复合材料的结晶度越高，电阻率越低，这是由于结晶造成的体积收缩所致。而且，复合材料在硫酸溶液中（pH=3）处理9d后，其电阻率出现下降，这是由于PET分子中的酯基发生水解，产生了大量的极性基团-COOH和-OH，但是这种水解只是发生在PET的局部。
英文摘要：
The PVDF/carbon black （CB）/graphite （GR） composites and PVDF/PET/CB/GR composites were prepared by melting blending method, and their melting behaviors, crystal behavious and electrical properties were characterized by differential scanning calorimeters （DSC） and resistivity measuring instrument. It was observed, in the PVDF/CB/GR composites, tile volume resistivity decreased with degree of crystallinity increased, which was attributed to the volume shrinkage from crystallization. For PVDF/PET/ CB/GR composites, a decrease in resistivity was found after PVDF/PET/CB/GR composites were treated in sulfuric acid solution （ pH = 3 ） for 9 days, and such phenomenon was due to the hydrolysis of ester groups in PET molecules and produced many polar COOH and OH groups. However, within the experimental period, the carbon black or graphite was still wrapped by polymer and did not leak into H2SO4 solution.
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Rheological properties, morphology, mechanical properties, electrical resistivity and EMI SE of cycl
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