Investigation of phase separated polyimide blend films containing boron nitride using FTIR imaging

Boknam Chae; Deok Gi Hong; Young Mee Jung; Jong Chan Won; Seung Woo Lee

doi:10.1016/j.saa.2018.01.025

Investigation of phase separated polyimide blend films containing boron nitride using FTIR imaging

Spectrochim Acta A Mol Biomol Spectrosc. 2018 Apr 15:195:1-6. doi: 10.1016/j.saa.2018.01.025. Epub 2018 Jan 10.

Authors

Boknam Chae¹, Deok Gi Hong², Young Mee Jung³, Jong Chan Won⁴, Seung Woo Lee⁵

Affiliations

¹ Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea.
² School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
³ Department of Chemistry, Kangwon National University, Chunchon 24341, Republic of Korea. Electronic address: ymjung@kangwon.ac.kr.
⁴ Center for Advanced Functional Polymers, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea. Electronic address: jcwon@krict.re.kr.
⁵ School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea. Electronic address: leesw1212@ynu.ac.kr.

PMID: 29353111
DOI: 10.1016/j.saa.2018.01.025

Abstract

Immiscible aromatic polyimide (PI) blend films and a PI blend film incorporated with thermally conductive boron nitride (BN) were prepared, and their phase separation behaviors were examined by optical microscopy and FTIR imaging. The 2,2'-bis(trifluoromethyl)benzidine (TFMB)-containing and 4,4'-thiodianiline (TDA)-containing aromatic PI blend films and a PI blend/BN composite film show two clearly separated regions; one region is the TFMB-rich phase, and the other region is the TDA-rich phase. The introduction of BN induces morphological changes in the immiscible aromatic PI blend film without altering the composition of either domain. In particular, the BN is selectively incorporated into the TDA-rich phase in this study.

Keywords: Boron nitride; FTIR imaging; Phase separation; Polyimide.