Synthesis and characterization of self-coloured poly(ethylene terephthalate)

Uglea, Constantin V.; Ofenberg, H.; Cascaval, A.

doi:10.1016/0014-3057(85)90106-5

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…In the first case, the dye is dissolved in molten polymer and a physical blend of the macromolecule and dye is obtained. In the second case, the dye become part of the macromolecule,20 as the main chain,9, 20, 21 or side chain,22–25 both via polymerization of monomeric dye,9, 21 or chemical modification of colorless polymers 11, 17, 26, 27. Polymerization of monomeric dyes could be performed via polycondensation of bifunctional dyes,9, 20, 21 or polyaddition of vinyl containing dyes,10, 15, 28 Concerted color formation polymerization is also reported 29…”

Section: Introductionmentioning

confidence: 99%

Synthesis of novel azo‐containing polyureas derived from 4‐[4′‐(2‐hydroxy‐1‐naphthylazo)phenyl]‐1,2,4‐triazolidine‐3,5‐dione

Mallakpour

Nasr‐Isfahani

2001

J of Applied Polymer Sci

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4-[4Ј-(2-Hydroxy-1-naphthylazo)phenyl]-1,2,4-triazolidine-3,5-dione (HNAPTD) (1) has been reacted with excess amount of n-propylisocyanate in DMF (N,N-dimethylformamide) solution at room temperature. The reaction proceeded with high yield, and involved reaction of both NOH of the urazole group. The resulting bis-urea derivative 2 was characterized by IR, 1 H-NMR, elemental analysis, UV-Vis spectra, and it was finally used as a model compound for the polymerization reaction. Solution polycondensation reactions of monomer 1 with Hexamethylene diisocyanate (HMDI) and isophorone diisocyanate (IPDI) were performed in DMF in the presence of pyridine as a catalyst and lead to the formation of novel aliphatic azo-containing polyurea dyes, which are soluble in polar solvents. The polymerization reaction with tolylene-2,4-diisocyanate (TDI) gave novel aromatic polyurea dye, which is insoluble in most organic solvents. These novel polyureas have inherent viscosities in a range of 0.15-0.22 g dL Ϫ1 in DMF at 25°C. Some structural characterization and physical properties of these novel polymers are reported.

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