www.tjprc.org editor@tjprc.org PREPARATION AND STRUCTURE CHARACTERIZATION OF PHENOLIC POLYMER BY TGA METHOD KHOBRAGADE Y F Research Scholar, Department of Chemistry, Government College of Engineering, Chandrapur, India ABSTRACT The synthesis linear p- Substituted polymer at different temperature i.e. 120 0 c for 6 hours and at 150 0 c for 12 hours. Analysis by thermal gravimetric analysis method (TGA), calculated thermal activation energy (Ea) and thermal degradation at different Temperature with mass loss in percentage, calculate theoretically mass loss, thermal stability, we have studied the structure analysis. From TGA with respect to mass loss at different temperature. These polymers possessed high molecular weight low proportion of unreached methylene groups. With these sample of polymers were analysed/ characterization by TGA method excellently. KEYWORDS: TGA, TG, Phenol, Methylene, Activation Energy, Thermal Degradation, Stability Received: Aug 19, 2021; Accepted: Sep 09, 2021; Published: Dec 02, 2021; Paper Id.: IJAPBCRDEC20216 INTRODUCTION The condensation of phenol with acetaldehyde in presence of acid catalyst gave resinous products reported by Beayar 1 . Manasse 2 independently synthesised ortho–hydroxybenzyl alcohol by low temperature alkaline – catalyzed formaldehyde reaction. Other 3-6 also prepared interesting compounds from phenol and formaldehyde. Beakeland, 7 granted a patent in 1909, describing his alkaline catalyzed Bakelite resins and also acid –catalyzed novalac product. Since then owing to their exceptional stability and other useful properties, these resins continue to find widespread uses. The reaction has been generally accepted that the phenol and alcohol condense with the elimination of water to yield three-dimensional macromolecules cross linked by methylene bridges. 8 Thermal stability of the polymer is highly dependent on the nature of the monomer unit, the structure of the polymer chain and reactivity of the macromolecule from the analysis the different polymers. It is revealed that the presence of rings in the backbone enhance the rigidity and her raises the melting points 9 . Introduction to double bonds into a player molecule increases its flexibility. On the other hand the presence of conjugated double, triple bonds and cross linking makes the molecules more rigid and raises the softening point. The intermolecular forces are responsible for the mechanical strength of the polymer and also for the thermal stability. Evolutionary modification of the known polymer systems, discovery of the new families of polymers by imaginative synthesis and greater understanding of structure property relations in polymer continually serve to enlarge the horizons of plastic materials 10 . Polymeric ablators can be categorized into two types, such as are subliming ablators and charring ablators. Ideal subliming ablators are those which undergo thermal depolymerisation quantitatively and reversibility. But on the other hand, the most important feature of charring ablators for service under hyper thermal condition is that they must undergo cross linking reactions on pyrolysis and generate a dense carbonaceous char in high yield. The polymer scientists are now trying to synthesis phenol formaldehyde polymers which encompass both high Original Article International Journal of Applied, Physical and Bio-Chemistry Research (IJAPBCR) ISSN (P): 2277-4793; ISSN (E): 2319-4448 Vol. 11, Issue 2, Dec 2021, 57–64 © TJPRC Pvt. Ltd.