The natural form of carbon in cast iron is the free graphite flake form 鑄鐵內(nèi)的碳天然形式是游離石墨薄片形式。
In ductile iron , this graphite flake is modified by a specialized treatment process to form tiny spheres or nodules 在球墨鑄鐵內(nèi),這種石墨薄片通過特殊的處理方法變化成微小的球體。
In this thesis study , graphite nanosheets were effectively prepared from natural graphite flake . fabrication of graphite nanosheets with nylon 6 via an in - situ polymerization approach led to the nylon 6 / foliated graphite nanocomposites 通過原位聚合復合技術(shù),將石墨納米薄片分散于尼龍6基體中,構(gòu)造了尼龍6納米石墨納米導電復合材料。
The hydrophobic graphite flakes could be well dispersed by both anionic and nonionic surfactants . the stability of the graphite aqueous suspensions was improved with pva or pvp due to the macromolecular entropic elasticity and osmotic pressure 3 、 cmc在ph為9時分散石墨的效果最好,當其含量達到20 %時,其吸光度是pva 、 pvp的吸光度的兩倍多。
Graphite ) and the special viscoelasticity of polymer , interlayer exfoliation of the filler and its nanocompounding with polymers can be realized in the shearing force field of pan - milling , through the effects such as deformation , dislocation , tension - sliding and shearing exfoliation of graphite , the tension - thinning , pulverization of pp , as well as the imbedding , mixing and dispersion of graphite flakes in pp powder etc . the results show that the interlayer exfoliation of graphite and nano - compounding with pp proceeded stepwise , caused by a combination of friction , squeezing , stretching , and shearing in three - dimension during pan - milling 石墨片層的受限空間影響i一pp / yep25o復合材料中pp結(jié)晶行為,進入石墨片層間的pp分子一部分擇優(yōu)取向,形成沿( 040 )晶面法線方向擇優(yōu)生長的a一晶,另一部分相對分子質(zhì)量較小、運動活性較高的pp分子則受到石墨片層的擠壓和限制而轉(zhuǎn)化為y -晶,在i一pp廳ep250復合材料中, y -晶相對含童達34 . 8 % 。