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Tuning the Electrically Conductive Network of Grafted Nanoparticles in Polymer Nanocomposites by the Shear Field

Chinese Journal of Polymer Science 2020年第12期38卷 1426-1434页

作者： Yan-Long Luo Xiao Hui Duan Bin Li Xin-Ling Chen Yang Yang Gao Li-Qun Zhang Cllege of Science Nanjing Forestry UniversityNanjing 210037 China keylaboratoryof bejing ciy on preparation and pocessing of novel polmer materials Bejing University ofChemical TechnologyBejing 100029China State Key Laboratory of Organic-lnorganic Composites bejing Universityof Chemical Technology Bejing 10029China School of Chemical Engneering and Technology.Sun Yat sen University Zhuhai 519082 China

Contolling the formation of the conductive network in the polymer nanocomposites(PNCs)is very meaningful to enhance their electrical *** this work,we investigated the effect of grafted nanoparticles(NPs)on the conductive probability of PNCs in the quiescent state as well as under the shear field via a coarse grained molecular dynamics *** is found that the smallest percolation threshold is realized at the moderate grafting density,the moderate length of grafted chains or the moderate interaction between grafted chains and free *** to it,the dispersion state of NPs varies from the contact aggregation to the uniform *** analyzing the connection mode among NPs,the probabilty of NPs which connect three other ones reaches the maximum value at their moderate dispersion state which is responsible for the optimal conductive *** addition,the main cluster size is characterized to better understand the conductive network which is consistent with the percolation *** is interesting to find that the percolation threshold is smaller under the shear field than under the quiescent *** shear field induces more NPs which connect three other *** benefits the formation of the new conductive ***,the anisotropy of the conductive probability is reduced with increasing the grafting *** summary,this work provides a clear picture on how the conductive network of grafted NPs evolves under the shear field.

关键词： Conductive network Grafted nanoparticles Molecular dynamics simulation

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