Jump to main content
Jump to site search

Issue 23, 2020

In situ synthesis of MWCNT-graft-polyimides: thermal stability, mechanical property and thermal conductivity

Author affiliations

Abstract

Herein, MWCNT-graft-polyimides (MWCNT-g-PIs) were prepared by the in situ grafting method. Strengthening the interfacial interaction between MWCNTs and polyimide chains decreased their interfacial thermal resistance (RC). In contrast to the RC of 10% MWCNT/PIs, the RC of 10% MWCNT-g-PI decreased by 16.7%. Hence, MWCNT-g-PIs possessed higher thermal conductivity than MWCNT/polyimides (MWCNT/PIs). Meanwhile, the Tg values of all the samples (MWCNT/PIs and MWCNT-g-PIs) were greater than 399 °C (by DMA). Compared with MWCNT/PIs, 5% and 10% MWCNT-g-PIs showed enhancement in thermal stability in air. The storage modulus retentions were greater than 63% at 200 °C and 45% at 300 °C. Also, 5% and 10% MWCNT-g-PIs maintained the high tensile strength of pure PI, and the tensile modulus increased up to 2.59 GPa on increasing the loading amount of MWCNTs. This study sheds light on improving the thermal conductivity of polyimides effectively at relatively low loadings.

Graphical abstract: In situ synthesis of MWCNT-graft-polyimides: thermal stability, mechanical property and thermal conductivity

Article information


Submitted
15 Jan 2020
Accepted
06 Mar 2020
First published
02 Apr 2020

This article is Open Access

RSC Adv., 2020,10, 13517-13524
Article type
Paper

In situ synthesis of MWCNT-graft-polyimides: thermal stability, mechanical property and thermal conductivity

C. Wang, B. Cong, J. Zhao, X. Zhao, D. Wang, H. Zhou and C. Chen, RSC Adv., 2020, 10, 13517 DOI: 10.1039/D0RA00449A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements