In Situ Polymerized Carbon Nanotube/Polyimide Nanocomposites: Effect of Reaction Stoichiometry on the Glass Transition Properties of the Nanocomposites

Dae Hwan Kim; You-Yeon Won

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In Situ Polymerized Carbon Nanotube/Polyimide Nanocomposites: Effect of Reaction Stoichiometry on the Glass Transition Properties of the Nanocomposites

机译：原位聚合碳纳米管/聚酰亚胺纳米复合材料：反应化学计量对纳米复合材料玻璃化转变性能的影响

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A series of in situ polymerized CNT/PI nanocomposite materials synthesized at a fixed diamine-to-dianhydride monomer feed ratio with varying concentrations of added -COOH-functionalized CNT is studied. It is found that the glass transition temperature of the nanocomposite varies non-monotonically with CNT concentration. To determine the origin of this behavior, the molecular weights of the matrix polymers are measured by the intrinsic-viscosity method. The functional-group density of the CNT material is determined by potentio-metric titration. The results confirm that the glass transition of the CNT/PI system depends on the concentration of the CNT filler through its influence on the functional group stoichiometry and thus on the molecular weight of the polycondensation product.

机译：研究了以固定的二胺与二酐单体进料比和不同浓度的-COOH-官能化CNT合成的一系列原位聚合的CNT / PI纳米复合材料。发现纳米复合材料的玻璃化转变温度随CNT浓度非单调变化。为了确定这种行为的起因，通过特性粘度法测量基质聚合物的分子量。 CNT材料的官能团密度通过电位滴定法确定。结果证实，CNT / PI体系的玻璃化转变通过其对官能团化学计量的影响并因此取决于缩聚产物的分子量，取决于CNT填料的浓度。

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来源
《Macromolecular reaction engineering》 |2012年第1期|p.45-56|共12页
作者
Dae Hwan Kim; You-Yeon Won;
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作者单位

School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA;

School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA;

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正文语种 eng
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关键词
carbon nanotubes; glass transition temperatures; nanocomposites; polyimides; reaction stoichiometry;

机译：碳纳米管;玻璃化转变温度;纳米复合材料聚酰亚胺反应化学计量;

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In Situ Polymerized Carbon Nanotube/Polyimide Nanocomposites: Effect of Reaction Stoichiometry on the Glass Transition Properties of the Nanocomposites

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