Allı, Abdulkadir | Allı, Sema | Becer, C. Remzi | Hazer, Baki

Article | 2014 | JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY91 ( 5 ) , pp.849 - 858

One-pot synthesis of graft copolymers by ring-opening polymerization and free radical polymerization using polymeric linoleic acid peroxide (PLina) is reported. Graft copolymers having structures of poly(linoleic acid)-g-polystyrene-g-poly(epsilon-caprolactone) were synthesized from PLina, possessing peroxide groups on the main chain by the combination of free radical polymerization of styrene and ring-opening polymerization of epsilon-caprolactone in one-step. Principal parameters, such as monomer concentration, initiator concentration, and polymerization time, which effect the one-pot polymerization reactions were evaluated. The o . . .btained graft copolymers were characterized by H-1-NMR and DOSY-NMR spectroscopy, gel permeation chromatography, thermal gravimetric analysis and differential scanning calorimetry techniques Daha fazlası Daha az

Hazer, Baki | Ayyıldız, Elif | Bahadır, Faruk

Article | 2017 | JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY94 ( 9 ) , pp.1141 - 1151

This work refers to the synthesis of a new double hydrophilic thermo-responsive polymer using fatty acid macroperoxide initiator, N-isopropyl acryl amide (NIPAM) and polyethylene glycol with two primary amine ends (PEGNH2). For this purpose, oleic acid was spread out onto a petri dish and exposed to air oxygen at room temperature for 2 months. The obtained fatty acid macro-peroxide initiator was used in the free radical polymerization of NIPAM in the presence of PEGNH2. Poly oleic acid-g-PNIPAM-g-PEG graft copolymers were successfully obtained. Lower critical solution temperature (LCST) of the graft copolymer was determined by using . . . UV-Vis spectrometry with a sensible heating unit. Morphology of the fractured surface of the double hydrophilic polymers was visualized by using SEM micrographs. Graft copolymers with LCST close to body temperature were obtained by changing PEG inclusion. Structural characterization, thermal analysis and size exclusion chromatography measurements of the obtained products were done Daha fazlası Daha az