Aromatic polyesters containing pendant azido groups: Synthesis, characterization, chemical modification and thermal cross-linking

Nagane, Samadhan S.; Verma, Savita; Tawade, Bhausaheb V.; Sane, Prakash S.; Dhanmane, Sushilkumar A.; Wadgaonkar, Prakash P.

doi:10.1016/j.eurpolymj.2019.04.019

Cited by 20 publications

(18 citation statements)

References 43 publications

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“…The addition of OP could not change the crystalline structure, but could decrease the crystallinity of FPUs structure due to the decrease in the height of the diffraction peaks. We can probably claim that the presence of OP-containing polyol in the macromolecular chain is responsible for disrupting chain regularity and packing in case of polyurethanes [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Novel Cast Polyurethanes Obtained by Using Reactive Phosphorus-Containing Polyol: Synthesis, Thermal Analysis and Combustion Behaviors

2021

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Phosphorus-containing polyol applications in polyurethane synthesis can prevent volatilization of flame retardants and their migration on the surface of a material. In this work, novel cast polyurethanes were prepared by a one-step method with the use of different amounts of phosphorus-containing polyol, 4,4′–diphenylmethane diisocyanate and 1,4-butanediol. The chemical structure, thermal, physicochemical and mechanical properties and flame resistance of the prepared materials were investigated. The results obtained for cast flame-retarded polyurethanes were compared with cast polyurethane synthesized with commonly known polyether polyol. It has been shown that with an increasing amount of phosphorus content to polyurethane’s chemical structure, an increased flame resistance and char yield were found during combustion tests. Phosphorus polyol worked in both the condensed (reduced heat and mass exchange) and gas phase (inhibition of flame propagation during burning). The obtained materials contained phosphorus polyol, indicating higher thermal stability in an oxidative environment than an inert atmosphere.

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Section: Resultsmentioning

confidence: 99%

Novel Cast Polyurethanes Obtained by Using Reactive Phosphorus-Containing Polyol: Synthesis, Thermal Analysis and Combustion Behaviors

2021

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“…The polymer shows initial decomposition temperature at 350 o C and char yield was found to be at 600 o C. From this, it was shown that the synthesized polyester was found to be thermally stable at 350 o C, which could be due to the aromatic rings present in the polymeric chain as indicated by similar studies reported in the literature for thermal decomposition of polyesters. 32,33 Differential Scanning Calorimetry (DSC)…”

Section: H Nmr Spectrummentioning

confidence: 99%

Synthesis and Studies on Aromatic Copolyester With Anticancer Activity Derived From 4,4’- Dihydroxybiphenyl and 3,5-Dihydroxytoluene

Sivaramakrishnan¹,

Elango²

2021

RJC

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In this investigation, a new wholly aromatic random copolyester containing 4,4'-dihydroxybiphenyl, 3,5dihydroxytoluene and Isophthaloyl chloride was synthesized using the solution polycondensation methodology in the mole ratio 2:1:3 and its solubility along with inherent viscosity were determined. The chemical structure of the copolyester was established by traditional spectroscopic techniques. The physical parameters of the polyester were studied employing WAXD studies and the thermal stability along with phase transitions were investigated employing TGA and DSC data. The morphological features in the polyester were probed using Scanning Electron Microscopy. The anticancer activity of copolyester was verified using HeLa (Cervical carcinoma) cell line employing MTT assay.

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“…Among the renewable sources, lignin and CNSL are the most attractive precursors of aromatic chemicals 14–16 . A plethora of rigid cycloaliphatic or aromatic bio‐based difunctional monomers useful for synthesis of thermoplastic polymers such as polyesters, 17–19 polycarbonates, 20,21 polyamides, 22,23 polyimides, 24,25 poly(amide‐imide)s, 26 poly(1,3,4‐oxadiazole)s, 27 poly(arylene ether)s 28–30 etc. have been synthesized starting from renewable‐resource‐based chemicals.…”

Section: Introductionmentioning

confidence: 99%

Partially bio‐based furyl‐functionalized organosoluble poly(ether ether ketone)s

Kuhire

Talanikar

Tawade

et al. 2020

Polymer International

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A new series of partially bio‐based (co)poly(ether ether ketone)s bearing pendent furyl groups was synthesized by nucleophilic aromatic substitution polycondensation of varying molar proportions of 4,4′‐(furan‐2‐ylmethylene)bis(2‐methoxyphenol) and bisphenol‐A with 4,4′‐difluorobenzophenone. The chemical structures, compositions and random nature of (co)poly(ether ether ketone)s were confirmed by NMR spectroscopy. Inherent viscosities and number‐average molecular weights of the (co)poly(ether ether ketone)s were in the range 0.74–2.90 dL g−1 and 33 500–46 300 g mol−1, respectively, indicating the formation of reasonably high molecular weight polymers. (Co)poly(ether ether ketone)s were readily soluble in common organic solvents and could be cast into tough, transparent and flexible films from chloroform solutions. (Co)poly(ether ether ketone)s exhibited 10% weight loss and glass transition temperatures in the range 429–464 and 152–156 °C, respectively. A representative copoly(ether ether ketone) was crosslinked with 1,1′‐(methylenedi‐1,4‐phenylene)bismaleimide via Diels–Alder reaction to form a crosslinked polymer which showed improved mechanical properties and was recycled twice without significant loss of mechanical properties. Diels–Alder/retro Diels–Alder reaction was demonstrated by studies of sol–gel transformation, solubility tests, DSC and stress–strain measurements. © 2020 Society of Chemical Industry

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Aromatic polyesters containing pendant azido groups: Synthesis, characterization, chemical modification and thermal cross-linking

Cited by 20 publications

References 43 publications

Novel Cast Polyurethanes Obtained by Using Reactive Phosphorus-Containing Polyol: Synthesis, Thermal Analysis and Combustion Behaviors

Novel Cast Polyurethanes Obtained by Using Reactive Phosphorus-Containing Polyol: Synthesis, Thermal Analysis and Combustion Behaviors

Synthesis and Studies on Aromatic Copolyester With Anticancer Activity Derived From 4,4’- Dihydroxybiphenyl and 3,5-Dihydroxytoluene

Partially bio‐based furyl‐functionalized organosoluble poly(ether ether ketone)s

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