Synthesis and characterization of poly(vinylchloride) type macrophotoinitiator comprising side-chain thioxanthone via click chemistry

Abstract

Abstract. Nowadays, the use of macromolecular photoinitiators provides for a good compatibility of the initiator in the formulation. Moreover, the migration of the initiator to the surface of the material is prevented, which results in low-odor and non-toxic coatings. In the present study, it has been demonstrated that polyvinylchloride macrophotoinitiator (PVC-TX) containing side chain thioxanthone (2%) moieties were successfully prepared by 'click chemistry'. For this purpose, propargyl thioxanthone and polyvinylchloride with side chain azide moieties were reacted in N,N-dimethylformamide for 24 hours at 25°C in order to give corresponding macrophotoinitiator. The synthesized polymer was characterized by 1 H-NMR (nuclear magnetic resonance), UV (ultraviolet) and fluorescence spectroscopies and water based gel permeation chromatography. Obtained macrophotoinitiator has similar absorption characteristics compared to parent thioxanthone. Its capabilities to act as initiator for the photopolymerization of methacrylic acid, methyl methacrylate, N-vinyl pyrrolidone and styrene in various solvents in the absence and presence of triethylamine media were also examined.

Polypropylene-based graft copolymers via CuAAC click chemistry

“…Modification of polymers with CuAAC click reaction is very general, robust and particularly simple compared to other click chemistry reactions [34][35][36][37]. During the recent years, these reactions have been extensively applied for the modification of commercially available polymers such as PVC [38][39][40][41], polyethylene [42] and polypropylene [43,44]. In the frame of our continuous interest in developing novel polymeric materials from commercially available polymers, here, the modification of chlorinated polypropylene with poly(ethylene glycol) and poly(ɛ-caprolactone) was achieved by CuAAC click chemistry under mild conditions.…”

Nitroxide mediated radical polymerization for the preparation of poly(vinyl chloride) grafted poly(acrylate) copolymers

“…During the purification process, the use of an aqueous solution of EDTA was important to remove the residual copper catalysts. 67 The IR spectrum of the resulting material confirmed the consumption of azide groups (signals at 2100 cm -1 ) and the presence of new signals at 1600 cm -1 attributed to the -C=N-bonds of triazole (Fig. 3).…”

Cardanol Groups Grafted on Poly(vinyl chloride)—Synthesis, Performance and Plasticization Mechanism

“…Figure 2 shows the FT-IR spectra of PVC and PVC-0.25PEC, PVC-0.50PEC and PVC-0.75PEC. In comparison to the FT-IR spectra of PVC, a new strong peak appeared at 2110 cm −1 , which was attributed to the characteristic absorption peak of the azide group (–N 3 stretch) [ 23 , 24 , 25 ], indicating that PVC–N 3 had been prepared. With more PEC grafted onto the PVC matrix, the peaks at 2910, 1586 and 1152–1454 cm −1 , which were attributed to C–H stretch, C–C bonds, and the C=C stretching vibration mode derived from the benzenoid ring of PEC, respectively, appeared stronger than PVC–N 3 , indicating that the PEC had been grafted onto the PVC matrix.…”