American Journal of Polymer Science
p-ISSN: 2163-1344 e-ISSN: 2163-1352
2018; 8(2): 23-28
doi:10.5923/j.ajps.20180802.01
Ganiyu K. Latinwo1, Samuel E. Agarry1, Bukola K. Olopade1, Vincent E. Efeovbokhan2, Jimoh O. Hamed3
1Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
2Department of Chemical Engineering, Covenant University, Ota, Nigeria
3African Regional Centre for Space Science and Technology Education in English, Obafemi Awolowo University, Ile-Ife, Nigeria
Correspondence to: Ganiyu K. Latinwo, Department of Chemical Engineering, Ladoke Akintola University of Technology, Ogbomoso, Nigeria.
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Copyright © 2018 The Author(s). Published by Scientific & Academic Publishing.
This work is licensed under the Creative Commons Attribution International License (CC BY).
http://creativecommons.org/licenses/by/4.0/
Poly (isocyanurate-imide)s (PIR-PI)s foams have been prepared from the reaction of polyimide (PI) and polyisocyanurate (PIR) prepolymers with different weight ratios of PIRs. The synthesis involve a two stage reaction process, in which firstly, a polyamic acid was produced from a polycondensation of pyromellitic dianhydride (PMDA) and 4,4’-oxydianiline (ODA) in the presence of isoquinoline (IQ), benzoic acid and dimethyl formamide (DMF). The polyamic acid was thermally imidized at 190°C to produce the PI precursor which was reacted with PIR prepolymer produced from the trimerization of 6.3 equivalents isocyanate and 1 equivalent polyol with -tris (3-dimethylaminopropyl) hexahydro-s-triazine as catalyst. The PIR-PIs were characterized by infrared spectroscopy, thermal gravimetric (TGA), differential thermogravimetric (DTG), and solubility analyses. The PIR-PI foams were soluble in polar aprotic solvent only on heating, soluble in H2SO4 at room temperature, but insoluble in acetone. The PIR-PI foams showed excellent thermal stabilities. The temperature of T5% ranged from 328 – 350°C and the residual weights (Rw) were more than 40% at 450°C. The study revealed that presence of phenyl groups and imide structures in the PIR-PI backbone can improve thermal stability.
Keywords: Poly(isocyanurate-imide) foam, Solubility, Thermal properties, Spectroscopy
Cite this paper: Ganiyu K. Latinwo, Samuel E. Agarry, Bukola K. Olopade, Vincent E. Efeovbokhan, Jimoh O. Hamed, Preparation and Characterization of Polyisocyanurate Modified Polyimide Foam, American Journal of Polymer Science, Vol. 8 No. 2, 2018, pp. 23-28. doi: 10.5923/j.ajps.20180802.01.
![]() | Figure 1. FTIR of PIR foam |
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![]() | Figure 2. FTIR of PIR-PI1 |
![]() | Figure 3. FTIR of PIR-PI2 |
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![]() | Figure 4. TGA and DTG characteristics of PIR |
![]() | Figure 5. TGA and DTG characteristics of PIR-PI1 |
![]() | Figure 6. TGA and DTG characteristics of PIR-PI2 |
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