DNA adsorption and dynamic mechanical analysis of polymeric oil/oil acid copolymers

Çakmaklı, Birten | Hazer, Baki | Erdoğan, Taner | Mutlu, Ayşe Gül

Article | 2013 | Journal of Polymer Research20 ( 3 )

A variety of new polymeric materials [Polylinseed oil-g-PMMA (PLO-g-PMMA), Polylinseed oil-g-PS (PLO-g-PS), Polysoybean oil-g-PMMA (PSB-g-PMMA), Polylinoleic acid-g-PMMA (PLina-g-PMMA), Polylinoleic acid-g-PS (PLina-g-PS), Polylinoleic acid-g-PnBMA (PLina-g-PnBMA), Polyhydroxy alkanoate-sy-g- Polysoybean oil-g-PMMA (PHA-PSB-PMMA) and Polyhydroxy alkanoate-sy-g- Polylinoleic acid-g-PMMA (PHA-PLina-PMMA)] were prepared from soluble polymeric oil/oily acid peroxides initiating the co-polymerization of Poly(methyl methacrylate) (PMMA), Polystyrene (PS) and Poly(n-butyl methacrylate) (PnBMA). Pure PMMA, PS, PnBMA and these copolymers con . . .tain different polymeric oil/oil acid initiators were investigated as to the relationship between their dynamic mechanical properties. The DMA results show that the transition from glassy to rubbery behavior is broad for these polymers due to the presence of the triglyceride/oil acid molecules acting like plasticizers in the system. Furthermore, they were compared with dynamic mechanical analysis (DMA) and differential scanning calorimeter (DSC) analysis results. The mechanical properties of these homopolymer and copolymers were also assessed by tensile tests of the polymers in terms of the stress and strain values at the break point. When these results were compared with those for PMMA and PnBMA, it is worth noting that copolymer samples containing PLO, PSB, or PLina in its structure showed changed stress at their break point or in the strain value at its break point. The contact angle testing and DNA adsorption of oil/oil acid copolymers were also studied. Compared with homopolymers, the hydrophilicity and DNA adsorption of the copolymer samples improved because of the presence of PLO, PSB, or PLina blocks. Considering all these results, it is recommended that the copolymers used as candidate biomaterials. © 2013 Springer Science+Business Media Dordrecht Daha fazlası Daha az

PMMA-multigraft copolymers derived from linseed oil, soybean oil, and linoleic acid: Protein adsorption and bacterial adherence

Çakmaklı, Birten | Hazer, Baki | Açıkgöz, Şerefden | Can, Murat | Cömert, Füsun B.

Article | 2007 | Journal of Applied Polymer Science105 ( 6 ) , pp.3448 - 3457

Synthesis of Poly(methyl methacrylate), PMMA-multigraft copolymers derived from linseed oil, soybean oil, and linoleic acid PMMA-g-polymeric oil/oily acid-g-poly(3-hydroxy alkanoate) (PHA), and their protein adsorption and bacterial adherence have been described. Polymeric oil/oily acid peroxides [polymeric soybean oil peroxide (PSB), polymeric linseed oil peroxide (PLO), and polymeric linoleic acid peroxide (PLina)] initiated the copolymerization of MMA and unsaturated PHA-soya to yield PMMA-PLO-PHA, PMMA-PSB-PHA, and PMMA-PLina-PHA multigraft copolymers. PMMA-PLina-PHA multigraft copolymers were completely soluble while PMMA-PSB-P . . .HA and PMMA-PLO-PHA multigraft copolymers were partially crosslinked. Crosslinked parts of the PLO- and PSB-multigraft copolymers were isolated by the sol gel analysis and characterized by swelling measurements in CHCl3. Soluble part of the PLO- and PSB-multigraft copolymers and completely soluble PLina-multigraft copolymers were obtained and characterized by spectroscopic, thermal, gel permeation chromatography (GPC), and scanning electron microscopy (SEM) techniques. In the mechanical properties of the PHA-PLina-PMMA, the elongation at break is reduced up to ~ 9%, more or less preserving the high stress values at its break point (48%) when compared to PLina-g-PMMA. The solvent casting film surfaces were studied by means of adsorption of blood proteins and bacterial adhesion. Insertion of the PHA into the multigraft copolymers caused the dramatic increase in bacterial adhesion on the polymer surfaces. PHA insertion into the graft copolymers also increased the protein adsorption. © 2007 Wiley Periodicals. Inc Daha fazlası Daha az

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