Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/154773
Title: Phthalonitrile prepolymer and PAN blends : new strategy for precursor stabilization and pyrolytic char yield enhancement
Authors: Tay, Yu Shan
Liu, Ming
Lim, Jacob Song Kiat
Chen, Hui
Hu, Xiao
Keywords: Engineering::Materials
Issue Date: 2020
Source: Tay, Y. S., Liu, M., Lim, J. S. K., Chen, H. & Hu, X. (2020). Phthalonitrile prepolymer and PAN blends : new strategy for precursor stabilization and pyrolytic char yield enhancement. Polymer Degradation and Stability, 172, 109056-. https://dx.doi.org/10.1016/j.polymdegradstab.2019.109056
Journal: Polymer Degradation and Stability
Abstract: New polymer blends of polyacrylonitrile (PAN) and resorcinol-based phthalonitrile prepolymer (pPN) are studied as superior carbon precursors. pPN has a hyperbranch-like structure with multiple terminal nitrile groups available for chemical interactions. The addition of pPN into PAN significantly lowers the cyclization temperature by more than 15 °C during the oxidative stabilization stage which is unprecedented and highly desirable giving rise to a multitude of advantages during carbonization. The presence of pPN also leads to large synergy in char yield by due to the specific interaction between the nitrile terminal groups in the hyperbranch-like pPN and PAN chains. The char yield at 600 °C increased from 57.7% to a remarkable 69.0% when 10 wt% of pPN is added into PAN even though under the same condition the char yield of neat pPN itself is only 48.8%. Additional advantages of this new approach, i.e., large shrinkage reduction and property enhancement, are also observed in the carbonaceous materials obtained from the pPN/PAN blends. Raman spectra reveal that the carbon structure is retained when 10 wt% or less pPN is used.
URI: https://hdl.handle.net/10356/154773
ISSN: 0141-3910
DOI: 10.1016/j.polymdegradstab.2019.109056
Rights: © 2019 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles
NEWRI Journal Articles
TL Journal Articles

SCOPUSTM   
Citations 50

1
Updated on Jan 7, 2022

PublonsTM
Citations 20

1
Updated on Jan 7, 2022

Page view(s)

57
Updated on Jun 25, 2022

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.