Aromatic Polyesters Containing Ether and a Kinked Aromatic Amide Structure in the Main Chain: Synthesis and Characterisation

Coatings

Satish S. Deokar¹  Sultan Alshehri²  Mohammed M. Ghoneim³  Makarand D. Joshi⁴  Mohaseen S. Tamboli⁵  Asiya M. Tamboli⁶  Nguyen Tam Nguyen Truong⁶  Noormahamad N. Maldar⁷ 

[1] Department of Chemistry, Shankarrao Mohite Mahavidyalaya, Akluj 413101, India;Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;Department of Pharmacy Practice, College of Pharmacy, Almaarefa University, AdDiriyah 13713, Saudi Arabia;Guru Nanak Dev Institute of Technology, Rohini, New Delhi 110089, India;Korea Institute of Energy Technology (KENTECH), 200 Hyeokshin-ro, Naju 58330, Jeollanam-do, Korea;School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Korea;School of Chemical Sciences, P. A. H. Solapur University, Solapur 413255, India;

关键词: N, N′-Bis (4-hydroxyphenoxyphenylene) isophthalamide;    soluble aromatic polyesters;    glass transition temperatures;    high-temperature stability;    XRD;   

DOI  :  10.3390/coatings12020181

来源: DOAJ

【 摘 要 】

A novel bisphenol containing preformed multiple ether and amide linkages, N, N′-Bis (4-hydroxyphenoxyphenylene) isophthalamide (IPCD), was prepared and analysed by spectroscopic methods. New aromatic polyesters were prepared by polycondensation of IPCD with 1, 3-benzene diacidchloride and/or 1, 4-benzene diacidchloride. These obtained polyesters were structurally analysed by infra-red spectroscopy, measurements of inherent viscosity, wide-angle X-ray diffraction patterns, and thermal techniques such as differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and solubility tests in organic solvents. The synthesised polyesters had high molecular weights, as indicated by their inherent viscosities from 0.67 to 0.78 dL/g in N-methyl-2-pyrrolidone. The incorporation of ether and kinked aromatic amide moieties in the main polyester chains greatly affected the properties of these aromatic polyesters. The prepared polyesters readily dissolved in amide-type polar aprotic solvents and pyridine, indicating their solution processability. The DSC curves above the polyesters showed glass transition temperatures of 194 to 269 °C. TGA indicated that these newly obtained polyesters were stable up to 301 °C and retained a 39 to 48% weight at 900 °C. W-XRD analyses showed that the newly synthesised polyesters were amorphous, which is reflected in their solubility behaviour.

【 授权许可】

Unknown