文献类型：期刊文献

中文题名：Facile Fabrication of High-performance Polyimide Nanocomposites with in situ Formed“Impurity-free”Dispersants

英文题名：Facile Fabrication of High-performance Polyimide Nanocomposites with in situ Formed “Impurity-free” Dispersants

作者：jing-jing shen[1];dong-ge zhang[1];xing liu[1];yu-chang tang[1];林宇[1];吴国章[1]

机构：[1]Shanghai Key Laboratory of Advanced Polymeric Materials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2016

卷号：34

期号：5

起止页码：532

中文期刊名：Chinese Journal of Polymer Science

外文期刊名：高分子科学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2015_2016】；

基金：supported by the National Basic Research Program of China(No.2013CB035505);the National Natural Science Foundation of China(No.51503066);Shanghai Sailing Program(No.14YF1404900);China Postdoctoral Science Foundation(No.2015M571502);the Fundamental Research Funds for the Central Universities

语种：中文

中文关键词：resultant milling attributed interfacial impurity dispersed Dispersants Impurity-free filler chains

外文关键词：resultant milling attributed interfacial impurity dispersed Dispersants Impurity-free filler chains

摘要：Polyimide/carbon black（PI/CB） nanocomposite films were fabricated via the direct ball-milling method with poly（amic acid）（PAA）, the precursor of PI, as an in situ formed impurity-free dispersant. FTIR and Raman spectral results reveal that, besides physical adsorption, chemical grafting of PAA chains onto the CB surface occurs during the ball-milling process. Comparative studies show that introduction of various commercial dispersants improves the dispersion of CB. However, the mixtures exhibit poor reproducibility, unstable electrical properties, and decreased tensile strength; these issues may be attributed to interfacial pollution brought about by differences in the chemical structures of the dispersant and the matrix. The impurity-free dispersant is effective not only in ensuring the uniform dispersion of CB particles but also in enhancing filler-matrix interfacial adhesion. High-molecular weight PAA chains are effective reagents for impurity-free modification and can therefore be used to improve the electrical and mechanical properties of the resultant composite.
Polyimide/carbon black（PI/CB） nanocomposite films were fabricated via the direct ball-milling method with poly（amic acid）（PAA）, the precursor of PI, as an in situ formed impurity-free dispersant. FTIR and Raman spectral results reveal that, besides physical adsorption, chemical grafting of PAA chains onto the CB surface occurs during the ball-milling process. Comparative studies show that introduction of various commercial dispersants improves the dispersion of CB. However, the mixtures exhibit poor reproducibility, unstable electrical properties, and decreased tensile strength; these issues may be attributed to interfacial pollution brought about by differences in the chemical structures of the dispersant and the matrix. The impurity-free dispersant is effective not only in ensuring the uniform dispersion of CB particles but also in enhancing filler-matrix interfacial adhesion. High-molecular weight PAA chains are effective reagents for impurity-free modification and can therefore be used to improve the electrical and mechanical properties of the resultant composite.