New Poly Hydrazides and Poly Oxadiazoles containing Aliphatic, Aromatic and Thianthrene Moieties in the Main Chain PDF

Keywords

Poly Hydrazides, Poly Oxadiazoles, Synthesis, Characterization, Thiadiazoles, Thianthrene

Abstract

A new class of poly hydrazides containing thiadiazole moiety in the main chain was synthesized. A solution polycondensation technique was used in the synthesis of these polymers. The monomer VII was synthesized from the nucleophilic replacement of VI with ethyl chloroacetate, followed by hydrazinolysis. The model compound VIII was synthesized from the monomer VII with benzoyl chloride and characterized by 1H-NMR, IR, and elemental analyses. The polyhydrazides IX-XIV were synthesized from the polymerization of the monomer VII with different aliphatic, aromatic or thianthrene diacid chlorides. These polymers were characterized by elemental and spectral analyses, viscometry and solubility. The thermal properties of these polymers were determined by TGA, and DTG, and correlated with their structure. The crystallinity of some polymers was tested by X-ray analyses and the morphological properties were detected by SEM.