International Journal of Scientific & Engineering Research, Volume 6, Issue 10, October-2015 303 ISSN 2229-5518 IJSER © 2015 http://www.ijser.org Synthesis And Characterization of New Hetero Ar- omatic Polyamide From benzo[1,2-d:4,5- d']bis(thiazole)-2,6-diamine Adesh Telvekar 1 , Sunder Kelkar 2 , Prakash Mahanwar* Abstract: A novel hetero aromatic polyamide has been synthesized using benzo[1,2-d:4,5-d'] bis(thiazole)-2,6-diamine, a diamine monomer, copolymerized with terephthaloyl chloride (TPC) by condensation polymerization. The yield of purified polymer was found to be more than 60% and was confirmed by FTIR and NMR analysis. . It shows inherent viscosity of 0.4 dLg -1 . The thermal behavior of the polymer was studied by using Differential Scanning Calo- rimeter (DSC) and Thermo Gravimetric Analysis (TGA). The glass transition temperature (Tg) of the polymer was found to be 201 o C by DSC analysis. The polymer was found to be stable up to 403 o C which confirm its high temperature performance. It also shows good solubility in aprotic polar organic solvents. The high thermal performance and good solubility, make it easily processable for desired application. Keywords: Benzo[1,2-d:4,5-d']bis(thiazole)-2,6-diamine, Condensation polymerization, Hetero aromatic polyamide, ,High performance material, High glass transition temprature, Soluble poly amide, Thermal stability. 1 INTRODUCTION ith the introduction of high performance thermoplastic materials like “Kevlar” (poly (p-phenyl tereph- thalamide)) having good chemical resistance, high thermal stability and ultrahigh mechanical strength, aromatic polyam- ides got commercial acceptance in industry [1]. U.S. federal trade commission has given separate generic name to aromatic polyamides containing more than 85% of the amide groups bounded directly to two aromatic rings as aramid [2]. These high performance aromatic polyamides are important as they can replace metals and ceramics in several fields, on virtue of their excellent mechanical, electrical and chemical properties. This drives attention of many researcher to study these poly- amides as high performance material for special applications [3]. This unusual property of aramides is due to an efficient micro crystalline region resulted from strong hydrogen bond- ing which leading to a compact rod like rigid structure [4]. Due to strong cohesive forces theses polymers exhibit higher transition temperature, generally above its degradation tem- perature. However, the lack of solubility of these polymers in common organic solvents make their industrial processing difficult [5]. While structural rigidity is important criteria in ———————————————— • Mr. Adarsh Telvekar, is currently pursuing Doctoral degree program in Poly- mer Technology, in Polymer and Surface Engineering Department, Instituite of Chemical Technology, Mumbai, India. Mobile : 9870011221. E-mail: adeshtelvekar@gmail.com • Mr. Sunder Kelkar, is currently pursuing Doctoral degree program in Chemis- try, in Polymer and Surface Engineering Department, Instituite of Chemical Technology, Mumbai, India. Mobile : +91 9595338066. E-mail: sunderkelkar@gmail.com • Corrosponding author, Prof. Prakash Mahanwar, (PhD. Tech) is currently Heading Polymer and Surface Engineering Department, Instituite of Chemical Technology, Mumbai, India. Phone: +91 – 22 - 33612401. E-mail: pa.mahanwar@ictmumbai.edu.in field of membranes. This high rigidity is usually associated with high Tg values [6]. To fulfill the increasing need of new processible engineering plastics, various studies have been carried out to introduce substituent’s having various chemical structures on the benzene rings of monomers. Also monomers containing several phenyl rings separated by flexible bridges, or heterocyclic monomers have been used [7]. Now, much at- tention has been given to the preparation of solution processi- ble poly imides by designing new di-amine or di-anhydride monomers [8]. Introduction of heterocyclic ring such as pyri- dine enhances the electron affinity, to improve electron trans- portation properties and thus provide various reaction sites for modification of polymer chain [9]. Hence such a polymers have higher thermal property, low flammability and excellent solubility in organic solvents [10]. In the present work, we have synthesized benzo[1,2-d:4,5- d']bis(thiazole)-2,6-diamine (BbTDA) which was used as het- ero aromatic di amine monomer for copolymerization with terephthaloyl chloride (TPC) by condensation polymerization. The new hetero aromatic polyamide, poly benzo[1,2-d:4,5-d'] bis thiazol amide (PBbTA) copolymer thus synthesized wascharacterized for its structural elucidation, thermal prop- erties, inherent viscosity, solubility and crystallographic prop- erties. 2 EXPERIMENTAL 2.1 Materials Ammonium thiocynate, benzoyl chloride, 1,4- W IJSER