Microbial Screening of Copolymers of N‐Vinylimidazole with Phenacyl Methacrylate: Synthesis and Monomer Reactivity Ratios

Soykan, Cengiz; Coşkun, Ramazan; Delibaş, Ali

doi:10.1080/10601320500246693

Cited by 23 publications

(17 citation statements)

References 35 publications

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“…This is well illustrated in Figure 1, displaying the PTHF content of the resulting conetworks as a function of PTHFDMA weight fraction in the feed. As shown in Figure 1, the PTHF content is higher than that of the 1:1 weight/weight incorporation of PTHF and VIm in all the cases, which is in agreement with expectations based on the reactivity ratios of the corresponding low molecular weight comonomers, that is, VIm and EMA 55. It is also evident from the data in Figure 1 that the apparent reactivity of both higher molecular weight PTHFDMAs is higher than that of the PTHFDMA with lower M n .…”

Section: Resultssupporting

confidence: 90%

“…As shown in Scheme , this process yields polymer conetworks in which the hydrophobic PTHF is a macromolecular cross‐linker of hydrophilic PVIm chains. As the reactivity ratios between VIm and ethyl methacrylate (EMA) were reported55 to be r 1 = 0.35 and r 2 = 3.47, the product of which is close to one, nearly random copolymerization can be expected between VIm and PTHFDMA, if other factors do not influence their reactivities. On the basis of these reactivity ratios, it is also evident that formation of conetworks with PTHF contents higher than that in the feed can be expected.…”

Section: Resultsmentioning

confidence: 99%

“…The relatively high extent of hydrophilic extractables in MeOH after conetwork syntheses in the case of the higher molecular weight PTHFDMAs corroborates this explanation. Thus, successful copolymerization can be carried out between high molecular weight PTHFDMA macromonomers and low molecular weight VIm comonomer in a common solvent for both polymers even in such a case, when the reactivity differences are high, but the macromonomer's low molecular weight counterpart is more reactive, such as EMA in the EMA/VIm system,55 and there is uneven partitioning between the solution and the macromonomer phase of the growing polymer chains.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO₂

Jiang

Zhu

et al. 2006

J of Applied Polymer Sci

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Bis(4-(4-amine-3,5-diisopropylbenzyl)-2,6-diisopropylphenylimino) acenaphthene NiBr 2 (Catalyst I) was synthesized. The complex covalently supported on Et 3 Altreated silica (SC) and used for ethylene polymerization was produced with cocatalyst of common inexpensive alkylaluminum compounds. Polyethylenes (PEs) with branching numbers of 12.94 (1000C) to 116.02 (1000C) were prepared in heptane. The polymerization conditions, such as the cocatalyst, Al/Ni ratio, and temperature, had significant effects on catalytic activity and properties of polyethylenes. Confirmed by high-temperature 13 C NMR, the polyethylenes synthesized contain significant amounts of not only methyl but also ethyl, propyl, butyl, pentyl, and other long branches (longer than six carbons). The branching degree of polyethylenes increased with temperature, while their molecular weight and melting point decreased correspondingly, resulting in linear semicrystalline to totally amorphous polymers. The formation of the branches could be illustrated by the chain walking mechanism, which controlled their specific spacing and conformational arrangements with one another.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO₂

Jiang

Zhu

et al. 2006

J of Applied Polymer Sci

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“…It can be used to functionalize medical devices to coffers them antibacterial activity or carbohydrate to reinforce the mentioned property . Besides, some works have reported antifungal character for PVim copolymers . On the other hand, P4VP also has promising potential applications because it shows biocompatibility with human cells; is cationic in aqueous medium and its pKa is close to 5 .…”

Section: Introductionmentioning

confidence: 99%

Comonomer effect: Switching the lower critical solution temperature to upper critical solution temperature in thermo‐pH sensitive binary graft copolymers

Pino‐Ramos

Cedillo

López‐Barriguete

et al. 2019

J of Applied Polymer Sci

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Hydrophilic biocompatible surfaces can be obtained by grafting stimuli‐sensitive polymers onto commercially available medical devices. Thermo and pH‐responsive polymers are two of the most studied materials due to their potential application as drug delivery systems. Poly(N‐vinylcaprolactam) has a lower critical solution temperature (LCST) near to physiological temperature. However, when it is grafted with pH‐sensitive moieties its LCST it is affected undergoing remarkable displacements. We studied the effect of acrylic acid (AAc), 4‐vinylpyridine (4VP), and 1‐vinylimidazole (Vim) on the LCST of N‐vinylcaprolactam (NVCL) grafted onto silicone rubber (SR), and SR‐g‐NVCL (32.5 °C). The binary graft copolymers were obtained by ionizing grafting radiation using the simultaneous technique; the samples were characterized by Fourier transform infrared attenuated total reflectance (FTIR‐ATR), cross‐polarization magic angle spinning nuclear magnetic resonance (CP/MAS 13C‐NMR), and thermogravimetrical analysis (TGA). LCST value was dramatically affected by the comonomer content; even it was observed the switching from LCST to upper critical solution temperature (UCST) for (SR‐g‐NVCL)‐g‐AAc and (SR‐g‐NVCL)‐g‐4VP samples. The observed behavior is rarely reported for binary graft copolymers. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48170.

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“…3,4 Thus, it is urgent to develop novel antibacterial agents. During the past decades, cationic polymers, [5][6][7][8][9][10][11][12][13][14][15][16][17][18] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 3 inorganic nanoparticles [23][24][25][26] have been reported to show promising antibacterial activities.…”

Section: Introductionmentioning

confidence: 99%

Layer-by-Layer (LBL) Self-Assembled Biohybrid Nanomaterials for Efficient Antibacterial Applications

Long

et al. 2015

ACS Appl. Mater. Interfaces

123

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Although antibiotics have been widely used in clinical applications to treat pathogenic infections at present, the problem of drug-resistance associated with abuse of antibiotics is becoming a potential threat to human beings. We report a biohybrid nanomaterial consisting of antibiotics, enzyme, polymers, hyaluronic acid (HA), and mesoporous silica nanoparticles (MSNs), which exhibits efficient in vitro and in vivo antibacterial activity with good biocompatibility and negligible hemolytic side effect. Herein, biocompatible layer-by-layer (LBL) coated MSNs are designed and crafted to release encapsulated antibiotics, e.g., amoxicillin (AMO), upon triggering with hyaluronidase, produced by various pathogenic Staphylococcus aureus (S. aureus). The LBL coating process comprises lysozyme (Lys), HA, and 1,2-ethanediamine (EDA)-modified polyglycerol methacrylate (PGMA). The Lys and cationic polymers provided multivalent interactions between MSN-Lys-HA-PGMA and bacterial membrane and accordingly immobilized the nanoparticles to facilitate the synergistic effect of these antibacterial agents. Loading process was characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and X-ray diffraction spectroscopy (XRD). The minimal inhibition concentration (MIC) of MSN-Lys-HA-PGMA treated to antibiotic resistant bacteria is much lower than that of isodose Lys and AMO. Especially, MSN-Lys-HA-PGMA exhibited good inhibition for pathogens in bacteria-infected wounds in vivo. Therefore, this type of new biohybrid nanomaterials showed great potential as novel antibacterial agents.

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Microbial Screening of Copolymers of N‐Vinylimidazole with Phenacyl Methacrylate: Synthesis and Monomer Reactivity Ratios

Cited by 23 publications

References 35 publications

Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO₂

Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO₂

Comonomer effect: Switching the lower critical solution temperature to upper critical solution temperature in thermo‐pH sensitive binary graft copolymers

Layer-by-Layer (LBL) Self-Assembled Biohybrid Nanomaterials for Efficient Antibacterial Applications

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Microbial Screening of Copolymers of N‐Vinylimidazole with Phenacyl Methacrylate: Synthesis and Monomer Reactivity Ratios

Cited by 23 publications

References 35 publications

Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO2

Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO2

Comonomer effect: Switching the lower critical solution temperature to upper critical solution temperature in thermo‐pH sensitive binary graft copolymers

Layer-by-Layer (LBL) Self-Assembled Biohybrid Nanomaterials for Efficient Antibacterial Applications

Contact Info

Product

Resources

About

Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO₂

Preparation of highly branched polyethylene using (α‐diimine) nickel complex covalently supported on modified SiO₂