Please use this identifier to cite or link to this item: https://doi.org/10.1002/mame.200290027
Title: Thermal imidization of the precursor of a liquid crystalline polyimide
Authors: Pramoda, K.P.
Liu, S. 
Chung, T.-S. 
Keywords: FT-IR
Liquid crystalline polymers (LCP)
Polyimides
Issue Date: 30-Dec-2002
Source: Pramoda, K.P., Liu, S., Chung, T.-S. (2002-12-30). Thermal imidization of the precursor of a liquid crystalline polyimide. Macromolecular Materials and Engineering 287 (12) : 931-937. ScholarBank@NUS Repository. https://doi.org/10.1002/mame.200290027
Abstract: Imidization of the precursor of a liquid crystalline polyimide was investigated using modulated differential scanning calorimetry (MDSC), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analyzer (TGA) coupled to FTIR (TG-IR). The FTIR study revealed that the rate and degree of imidization are functions of curing temperature and time. Imidization proceeds in two stages under isothermal condition. The initial weight loss up to 250 °C as observed from TGA was due to thermal cyclization, i.e., imidization process. The XPS analysis shows that the poly(amic acid) has two nitrogen 1s species at 400.3 and 399.2 eV possibly due to the isomerism of the dianhydride carbonyl, while liquid crystalline polyimide shows only a single nitrogen 1s species at 400.8 eV due to imide species.
Source Title: Macromolecular Materials and Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/66885
ISSN: 14387492
DOI: 10.1002/mame.200290027
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

45
checked on Dec 6, 2017

WEB OF SCIENCETM
Citations

43
checked on Nov 22, 2017

Page view(s)

37
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.