TY - JOUR
T1 - Simple and rapid electrochemical monitoring for depolymerization of polyamic acid
AU - Kim, Jee Woo
AU - Kim, Seong Jong
AU - Song, In Young
AU - Lee, Wang Eun
AU - Heo, Kyuyoung
AU - Kim, Sang Youl
AU - Lee, Jinhee
AU - Kim, Byung Kwon
N1 - Funding Information:
This work was supported by National Research Foundation of Korea , which is funded by the Ministry of Science and ICT ( NRF-2021R1A2C4002069 , NRF-2018R1C1B6008668 ). This research was supported by the Basic Science Research Program of the National Research Foundation of Korea ( NRF ) funded by the Ministry of Education ( 2021R1A6A1A10039823 ). This research was supported by the Institutional Research Program ( SI2252-20 ) of the Korea Research Institute of Chemical Technology ( KRICT ) and by the National Research Foundation ( NRF ) of Korea ( NRF-2021R1A4A1052070 ).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/11/15
Y1 - 2022/11/15
N2 - Excellent thermal and mechanical properties of aromatic polyimides (PIs) make them attractive materials in various fields. PIs is performed using polyamic acid (PAA) precursors due to their limited solubility. However, PAAs can be easily depolymerized by moisture and heat, which can degrade the properties of PIs. Therefore, quality control of PAAs is an important task in researches and industrial applications. Here, we propose a simple, rapid, and novel method to observe the depolymerization of PAAs. The method is based on the principle that, as the molecular weight of the polymer decreases, the solution viscosity decreases, and the viscosity of the solution can be easily and rapidly measured using electrochemistry. We accelerated depolymerization by applying heat to a PAA solution and measured the change in viscosity of the solution through cyclic voltammetry. The proposed method, which also makes it possible to determine the dynamic viscosity of a polymer solution, is presented as a model system to observe state changes in various polymers.
AB - Excellent thermal and mechanical properties of aromatic polyimides (PIs) make them attractive materials in various fields. PIs is performed using polyamic acid (PAA) precursors due to their limited solubility. However, PAAs can be easily depolymerized by moisture and heat, which can degrade the properties of PIs. Therefore, quality control of PAAs is an important task in researches and industrial applications. Here, we propose a simple, rapid, and novel method to observe the depolymerization of PAAs. The method is based on the principle that, as the molecular weight of the polymer decreases, the solution viscosity decreases, and the viscosity of the solution can be easily and rapidly measured using electrochemistry. We accelerated depolymerization by applying heat to a PAA solution and measured the change in viscosity of the solution through cyclic voltammetry. The proposed method, which also makes it possible to determine the dynamic viscosity of a polymer solution, is presented as a model system to observe state changes in various polymers.
KW - Diffusion
KW - Electrochemical analysis
KW - Polyamic acid
KW - Polymer depolymerization sensing
KW - Solution viscosity
UR - http://www.scopus.com/inward/record.url?scp=85139826517&partnerID=8YFLogxK
U2 - 10.1016/j.aca.2022.340489
DO - 10.1016/j.aca.2022.340489
M3 - Article
C2 - 36283779
AN - SCOPUS:85139826517
SN - 0003-2670
VL - 1233
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
M1 - 340489
ER -