Synthesis and study of polycyanurates based on 2-carbazol-4,6-dichloro-s-triazine

Abstract

Eight polycyanurates have been synthesized by the interfacial polycondensation of 2-carbazol-4,6-dichloro-s-triazine with 1,7-dihydroxynaphthalene (DHN-1,7), 1,4-dihydroxyanthraquinone (DHA-1,4), ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG), 1,2-propanediol (Pr-1,2), 1,4-butanediol (Bu-1,4) and 1,8-dihydroxyanthraquinone (DHA-1,8). All of the polycyanurates thus synthesized were characterized for their solubility, density, viscosity, infrared spectra, nuclear magnetic resonance spectra and thermogravimetric analysis. Chlorinated solvents were found to be good solvents for all of the polymers. The density of the polycyanurates varied from 1.186 to 1.247 gm cm À3 . The intrinsic viscosity of the polycyanurates followed the sequence given below: homopolycyanurates of DHN-1,7 (HPDHN-1,7)4homopolycyanurates of DHA-1,8 (HPDHA-1,8)4homopolycyanurates of DHA-1,4 (HPDHA-1,4)4homopolycyanurates of EG (HPEG)4homopolycyanurates of DEG (HPDEG)4homopolycyanurates of TEG (HPTEG)4homopolycyanurates of Bu-1,4 (HPBu-1,4)4homopolycyanurates of Pr-1,2 (HPPr-1,2). The thermal stability of the polycyanurates increased as follows: HPTEGoHPPr-1,2oHPDEGEHPBu-1,4oHPEGoHPDHA-1,8oHPDHA-1,4oHPDHN-1,7.

Design and synthesis of new s-triazine polymers and their application as nanoparticulate drug delivery systems

“…Because of these versatile properties and applications, many research projects have been undertaken to synthesize new polyamides and to modify them to obtain desired properties. 34 Since early 2000's, polyamide polymers 35,36 have been investigated in cancer nanomedicines. Polymeric nanocarriers provide the possibility to encapsulate water insoluble drugs, protect unstable bioactives, and modify their pharmacokinetics and systemic circulation behavior.…”

Crystal structure of ethyl 2-(4-chloroanilino)acetate

“…The title compound was synthesized as a precursor for the preparation of biological sydnone derivatives (Satheesha Rai et al, 2008;Patel & Patel, 2012, Asundaria et al, 2010Ding et al, 2013;Fadda & Elattar, 2012). In the title molecule ( Bond lengths and angles (Table 2) are compatible with those found in a related compound (Zhang et al, 2010).…”

“…For the biological activity of sydnone derivatives, see: Satheesha Rai et al (2008); Patel & Patel (2012). For an overview of sydnone derivatives, see: Asundaria et al (2010); Ding et al (2013); Fadda & Elattar (2012). For a related structure, see: Zhang et al (2010).…”

A new method to prepare low melting point polyamide‐6 and study crystallization behavior of polyamide‐6/calcium chloride complex by rheological method

“…DuPont and other institution have prepared LPA6 by restricting crystallization of PA, which is mostly prepared by the copolymerization method . Because the synthesis process of this method is intricate and time‐consuming, the application of LPA6 is limited.…”