Vol. 13 | No. 3 |1458-1471| July - September | 2020 ISSN: 0974-1496 | e-ISSN: 0976-0083 | CODEN: RJCABP http://www.rasayanjournal.com http://www.rasayanjournal.co.in Rasayan J. Chem., 13(3), 1458-1471(2020) http://dx.doi.org/10.31788/RJC.2020.1335683 SYNTHESIS, CHARACTERIZATION AND STUDY OF FLUORESCENT-HIGH PERFORMANCE POLYESTERS Jignasa V. Modh and Saurabh. K. Patel* Department of Chemistry, Veer Narmad South Gujarat University, Surat-395007(Gujarat) India. *E-mail: saurabh.silvina@gmail.com ABSTRACT Fluorescent-High performance polyesters have been synthesized by the polycondensation method at high temperature using cetrimide as initiator. Ten Polyesters were synthesized having different aliphatic-aromatic diols in the chain having s-triazine ring as the main moiety. Modification and introduction of the bulky pendent group in monomer structure increase the thermal stability of the polymers. The synthesized polymers have shown gray to black color. The solubility properties of synthesized polyesters were carried out in polar and non-polar solvents. The inherent and reduced viscosities were checked by Ubbelohde solution Viscometer and intrinsic viscosity was measured using Huggins and Kraemer’s equations. Thermogravimetric analysis of all the polyesters has been carried out. The unique property of fluorescence of these polyesters makes them valuable candidates as high-performance materials. Keywords: Polycondensation, Thermogravimetric Analysis, High Performance, Fluorescence, Viscosity. © RASĀYAN. All rights reserved INTRODUCTION In recent years, many researchers have been affected by the synthesis and characterization of fluorescent - high-performance polymers. 1 High thermal stability of polymers due to the s-triazine moiety, it is notable that the s-triazine ring is heat resistant. 2,3 Polymers having S-Triazine ring become a subject of interest because of good thermal stability, enhanced toughness and low moisture absorption and commercially available high-performance engineering plastic materials. 4 The Triazine based material reveals outstanding high-temperature performance, which could be assigned to the N- heterocyclic structures 5 . Polymers containing the triazine ring as part of the polymer chain are usually insoluble and infusible. However, the thermal stability of the triazine ring makes it an attractive monomer for use in high-temperature polymers. High-performance polymers have been utilized in applications that demand services at elevated temperatures while maintaining their structural integrity and an outstanding combination of chemical, physical and mechanical properties. Since the 1980s, fluorescent polymers utilized in commercial development further attracted tremendous scientific and industrial interest due to their potential in achieving the goal of light-emitting device technology that is economically viable for solid-state lighting and displays, which offer significant gains in power efficiency, color quality, and lifetime at a lower cost and less environmental impact than traditional incandescent and fluorescent lighting. 6-14 Fluorescent polymeric materials have been achieved a great intentness owing to wide range application such as clean energy technologies 15 , explosive sensing, pH/ temperature sensor, biological imaging 16 life science, material science, ultrasensitive molecular diagnosis and novel light-emitting Nano devices 17 , and biological detection schemes, smart polymer machines, fluorescent chemosensor, fluorescent molecular thermometers, fluorescent imaging, drug delivery carriers, and so on. 18,19 Fluorescent polymers can be developed with different methods, generally, there are two admittances for the preparation of fluorescent polymers. One of them polymerization of a monomer having a fluorescent chromophore such as fluorescent compounds as initiator, fluorescent compounds as chain transfer agents, chemical bonding between fluorescent groups and polymers 20-24 , the second is the chemical variation of polymers by fluorescent