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| Content Provider | Springer Nature Link |
|---|---|
| Author | Chauhan, Narendra P. S. |
| Copyright Year | 2011 |
| Abstract | A terpolymer resin involving p-acetylpyridine oxime and p-methylacetophenone with formaldehyde (APOMAF) was synthesized by condensation polymerization in the presence of an acid catalyst. The structure of terpolymer was elucidated by FT-IR, $^{1}$H NMR, pyrolysis gas chromatography mass spectrometer (Py–GC–MS), nitrogen adsorption/desorption analysis, Ubbelohde viscometer and non-aqueous conductometric titration, TG–DTG and DSC. Molar fractions of monomer, condensing and comonomer unit (m $_{1}$, m $_{2}$, and m $_{3}$) in APOMAF using $^{1}$H NMR analysis data were calculated as 1.67; 0.27 and 0.66 mol%, respectively. The apparent activation energy of terpolymer by using various degradation models including the Flynn–Wall–Ozawa (FWO), Kissinger–Akahira–Sunose (KAS), and Friedman methods were 140.3; 144.9 and 129.9 kJ mol$^{−1}$, respectively. The results from isoconversional degradation kinetics and Pyrolysis (GC–MS) indicates that the degradation mechanism of terpolymer are likely limited by at least two-reaction step, the first being associated with the loss of the pendent methyl, acetyl, and oxime groups (side group elimination) while the second mass loss being due to the degradation of the terpolymer backbone (random scission) which clearly indicates that grafting pendant groups to the terpolymer backbone yields polymers with lower thermal stability. From the calculation, the solid state thermal degradation mechanism is proposed to be D$_{3}$ (three-dimensional diffusion) at initial stage and F $_{1}$ (Random nucleation with one nucleus on the individual particles) at final stage. |
| Starting Page | 1377 |
| Ending Page | 1388 |
| Page Count | 12 |
| File Format | |
| ISSN | 13886150 |
| Journal | Journal of thermal analysis |
| Volume Number | 110 |
| Issue Number | 3 |
| e-ISSN | 15728943 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2011-12-09 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Terpolymer Characterization Py–(GC–MS) Isoconversional methods Kinetics Thermodegradation Thermal stability Solid state mechanism Analytical Chemistry Inorganic Chemistry Physical Chemistry Measurement Science and Instrumentation Polymer Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physical and Theoretical Chemistry Condensed Matter Physics |
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