Synthesis, vibrational spectrometry and thermal characterizations of coordination polymers derived from divalent metal ions and hydroxyl terminated polyurethane as ligand

Laxmi, .; Khan, Shabnam; Kareem, Abdul; Zafar, Fahmina; Nishat, Nahid

doi:10.1016/j.saa.2017.07.032

Cited by 22 publications

(17 citation statements)

References 43 publications

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“…Integral procedural decomposition temperature (IPDT) is mainly used as an indicator of the thermal stability of polymeric materials [ 26 , 27 ]. IPDT can be obtained by integrating the area under the thermal decomposition curve and substituting it into an integration equation, as in Figure 2 .…”

Section: Resultsmentioning

confidence: 99%

A Study on Circular Economy Material Using Fish Scales as a Natural Flame Retardant and the Properties of Its Composite Materials

et al. 2021

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Fish scales (FSs) are fishery wastes that can cause environmental pollution. This study aimed to solve this environmental problem. FSs were used as a flame retardant for polymer materials, making them valuable. Fish scales were combined with a commercial flame retardant, ammonium polyphosphate (APP), through synergistic effects to reduce the amount of commercial flame retardant. The use of FSs conforms to the concept of a circular economy and lowers costs by reducing the consumption of APP. Thermogravimetric analysis (TGA), integral procedural decomposition temperature (IPDT), pyrolysis kinetics, limiting oxygen index (LOI), the Underwriters Laboratories 94 (UL94) flammability test, scanning election microscopy, Raman spectroscopy, and energy-dispersive X-ray spectroscopy were used to determine the thermal properties, flame retardant properties, flame retardant mechanism, char morphology, and composition of the composites. The TGA results indicated that the addition of 40% flame retardant raised the char residue from 16.45 wt.% (pure EP) to 36.07 wt.%; IPDT from 685.6 °C (pure EP) to 1143.1°C; LOI from 21% (pure EP) to 30%; and UL94 classification from fail (pure EP) to V-0. These results suggest an increase in char residue, which indicates better protection of the polymer matrix material. The improvements in IPDT, LOI, and UL94 classification, which indicate greater thermal stability, lower flammability (from flammable to fireproof), and higher flammability rating (from fail to V-0), respectively, suggest that the composite material has favorable thermal properties and is less inflammable.

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Section: Resultsmentioning

confidence: 99%

A Study on Circular Economy Material Using Fish Scales as a Natural Flame Retardant and the Properties of Its Composite Materials

et al. 2021

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“…Doyle method was used to calculate the IPDT values from the thermal data [31]. In-vitro antibacterial activities of HTPU 300 and M(II)-HTPU 300 were carried out by agar diffusion method [29] against gram-positive(Staphylococcus aureus, Bacillus subtilis) and gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacterial strains as using the standard drug Ampicillin.…”

Section: Characterizationsmentioning

confidence: 99%

“…Similarly, the peak observed between 896-916 cm -1 may be due to rocking and wagging vibrations in M-H 2 O, [7] while the new peak appearing in between 752-773 cm -1 in Mn(II), Co(II) and Ni(II), Zn(II) may be due to the presence of coordinated water molecules. [40] Also, the weak bands lying between 448-459 cm -1 may be conveniently assigned to M-O stretching bonds [29]. The main changes observed after the coordination of the metal ions to HTPU 300 are summarized as follows:…”

Section: Electrical Conductivitymentioning

confidence: 99%

“…Khan et al derived cardanol formaldehyde-based polyurethane by the addition of divalent metal ions through the green route [28]. Laxmi et al synthesized the coordination polymer derived by the reaction of metal ions with hydroxyl-terminated PU as a ligand to formulate PU with good adsorption abilities [29]. Although, metal ions can strongly interact with the planar polymeric backbone which results in limited solubility, use of harmful solvents in huge quantities, multistep synthesis process, and longer reaction times during [30].…”

Section: Introductionmentioning

confidence: 99%

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Transition Metal-Ions Incorporated PEG300 and TDI Based Hydroxy-Terminated Polyurethanes

Laxmi¹,

Shahzaib²,

Khan³

et al. 2021

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Present work reports the synthesis of polyethylene glycol, PEG 300 (soft segment) and toluene 2,4-diisocyanate, TDI (hard segment) based hydroxy-terminated polyurethane ligands (HTPU300) for the first time to the best of our knowledge. The effect of 3d transition metal ions with different 3d electrons within HTPU (M(II)-HTPU300, M= Mn, Co, Ni, and Zn) was evaluated by their physical and antibacterial studies of the final complex polymeric unit. M(II) HTPU300 and was conveniently synthesized in appreciable yields following a facile and one-pot addition polymerization reaction scheme. Foremost the thermal stability of all the M(II)-HTPU300 polymeric materials were evaluated using TGA, DSC, and IPDT calculations. FTIR technique was used to ascertain the structure of M(II)-HTPU300, while SEM/EDX and XRD techniques were used to study their morphology, elemental analysis, and crystalline nature of the material, respectively. Further, the in-vitro antimicrobial activity of the PU was investigated against gram-positive (Staphylococcus aureus, Bacillus subtilis) and gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacterial strains. The comparatively moderate efficacy against bacterial stain supports the possible application of such PU as thermally stable bacterial resistant materials constructed out of degradable PEG.

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“…The traditional polymerization methods of organic macromolecules materials include condensation polymerization, free radical polymerization, ionic polymerization and coordination polymerization [15,16]. Shortcomings in traditional free radical polymerization and step polymerization are also notable.…”

Section: Introductionmentioning

confidence: 99%

BODIPY-based fluorescent polymeric probes for selective detection of Fe3+ ions in aqueous solution

Xiao

et al. 2021

SN Appl. Sci.

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It is of scientific and practical significance to sense and to remove heavy metal ions in the environment. In this work, four BODIPY-based fluorescent polymeric probes with the ability to sense and separate Fe3+ ions have been prepared via thiol-ene click reaction. The polymers have good thermal stability. Meanwhile, the results show that they have selective recognition capabilities only for Fe3+, which are mainly manifested as significant quenching of fluorescence and color modulation under visible light. The sensitivity is good, and the limit of detection reaches as low as 0.14 µM. They can also be used as reversible chemical probes to detect Fe3+. Therefore, the click reaction provides us with a facile method for preparing fluorescent polymer probes.

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Synthesis, vibrational spectrometry and thermal characterizations of coordination polymers derived from divalent metal ions and hydroxyl terminated polyurethane as ligand

Cited by 22 publications

References 43 publications

A Study on Circular Economy Material Using Fish Scales as a Natural Flame Retardant and the Properties of Its Composite Materials

A Study on Circular Economy Material Using Fish Scales as a Natural Flame Retardant and the Properties of Its Composite Materials

Transition Metal-Ions Incorporated PEG300 and TDI Based Hydroxy-Terminated Polyurethanes

BODIPY-based fluorescent polymeric probes for selective detection of Fe3+ ions in aqueous solution

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