Synthesis and characterization of oligosalicylaldehyde-based epoxy resins

Şahmetlioğlu, Ertuğrul; Mart, Hasan; Yürük, Hüseyin; Sürme, Yavuz

doi:10.2478/s11696-006-0012-1

Cited by 30 publications

(23 citation statements)

References 11 publications

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“…The epoxy value of all the polymers was found in the range 0.18–0.22 mol/100 g. Medium molecular weights in the range 2225–2300 were found by the reduction of the amount of excess epichlorohydrin. The chlorine content of all the epoxy polymers was found to be 0.01–0.012 mol/100 g due to many side reactions such as dehydrohalogenation [ 19 ]. The secondary hydroxyl group content (hydroxyl value) was found in the range of 0.24–0.28 mol/100 g, which was formed along the chain molecule after the epoxy group was reduced.…”

Section: Resultsmentioning

confidence: 99%

New Thermal and Microbial ResistantMetal‐ContainingEpoxy Polymers

Ahamad

Alshehri

2010

Bioinorganic Chemistry and Applications

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A series of metal-containing epoxy polymers have been synthesized by the condensation of epichlorohydrin (1-chloro-2,3-epoxy propane) with Schiff base metal complexes in alkaline medium. Schiff base was initially prepared by the reaction of 2,6 dihydroxy 1-napthaldehyde and o-phenylenediamine in 1 : 2 molar ratio and then with metal acetate. All the synthesized compounds were characterized by elemental, spectral, and thermal analysis. The physicochemical properties, viz., epoxy value, hydroxyl content, and chlorine content [mol/100 g] were measured by standard procedures. The antimicrobial activities of these metal-containing epoxy polymers were carried out by using minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) methods against S. aureus, B. subtilis (Gram-positive bacteria), and E. coli, P. aeruginosa (Gram-negative bacteria). It was found that the ECu(II) showed higher antibacterial activity than other metal-chelated epoxy resin while EMn(II) exhibited reduced antibacterial activity against all bacteria.

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Section: Resultsmentioning

confidence: 99%

New Thermal and Microbial ResistantMetal‐ContainingEpoxy Polymers

Ahamad

Alshehri

2010

Bioinorganic Chemistry and Applications

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“…These compounds usually constitute a mixture of phenylene (unit A) and oxyphenylene units (unit B) 6. Polyphenols containing different side group (R) such as sugar,2 flavanoid,5 ferrocene,6 epoxy,7 azobenzene,8 Schiff Base9–14 has been studied so far. Fluorene is another compound that has interesting electro‐ and optical properties.…”

Section: Introductionmentioning

confidence: 99%

Diol‐Linked Microporous Networks of Cubic Siloxane Cages

Wada¹,

Iyoki²,

Sugawara‐Narutaki³

et al. 2012

Chemistry A European J

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A new class of inorganic-organic hybrid porous materials has been synthesized by a reaction between octa(hydridosilsesquioxane) (H(8)Si(8)O(12)), which has a double-four-ring (D4R) structure, and various diols, such as 1,3-propanediol (PD), 1,4-cyclohexanediol (CHD), and 1,3-adamantanediol (AD). Solid-state (29) Si magic-angle-spinning NMR spectroscopic analysis confirmed that most of the corner Si-H groups reacted with diols to form Si-O-C bonds with retention of the D4R cage. Nitrogen adsorption-desorption studies showed that the products are microporous solids with high BET surface areas (up to ≈580 m(2) g(-1) for CHD- and AD-linked products). If n-alkanediols are used as linkers, the surface area becomes smaller as the number of carbon atoms is increased. The thermal and hydrolytic stability of the products strongly depend on the type of diol linkers. The highest stabilities are found for the AD-linked products, which are thermally stable up to around 400 °C and remain intact even after being soaked in water for 1 day. In contrast, the PD-linked product is easily hydrolyzed in water to give microporous silica. These results offer a new route toward a series of silica-based porous materials with unique structures and properties.

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“…Their main interest revolves around the active OH and NH 2 groups 3–5. Oligophenols are used to prepare composites, graphite materials, epoxy polymers and block copolymer adhesives, and antistatic materials that are resistant to high temperatures 6–8. They can gain new properties when other functional groups are added to their structures.…”

Section: Introductionmentioning

confidence: 99%

Schiff base‐substituted polyphenol: synthesis, characterisation and non‐isothermal degradation kinetics

Kaya

Doğan

Bi̇li̇ci̇

2009

Polymer International

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BACKGROUND: Polymers of phenols and aromatic amines have emerged as new materials in fields such as superconductors, coatings, laminates, photoresists and high‐temperature environments. The stability, kinetics and associated pollution of the thermal decomposition of oligophenols are of interest for the aforementioned fields. RESULTS: A new Schiff base polymer, derived from N,N′‐bis(2‐hydroxy‐3‐methoxyphenylmethylidene)‐2,6‐pyridinediamine, was prepared by oxidative polycondensation. Characterisations using Fourier transform infrared, UV‐visible, 1H NMR and 13C NMR spectroscopy, thermogravimetric/differential thermal analysis, gel permeation chromatography, cyclic voltammetry and conductivity measurements were performed. The number‐average (Mn) and weight‐average molecular weight (Mw) and dispersity (D = Mw/Mn) of the polymer were found to be 61 000 and 94 200 g mol−1 and 1.54, respectively. Apparent activation energies of the thermal decomposition of the polymer were determined using the Tang, Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose and Coats–Redfern methods. The most likely decomposition process was a Dn deceleration type in terms of the Coats–Redfern and master plot results. CONCLUSION: The mechanism of the degradation process can be understood through the use of kinetic parameters obtained from various non‐isothermal methods. Copyright © 2009 Society of Chemical Industry

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Synthesis and characterization of oligosalicylaldehyde-based epoxy resins

Cited by 30 publications

References 11 publications

New Thermal and Microbial ResistantMetal‐ContainingEpoxy Polymers

New Thermal and Microbial ResistantMetal‐ContainingEpoxy Polymers

Diol‐Linked Microporous Networks of Cubic Siloxane Cages

Schiff base‐substituted polyphenol: synthesis, characterisation and non‐isothermal degradation kinetics

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