Synthesis of polyamides based on activated diesters of pyridinecarboxylic acids

Zhubanov, B. A.; Lyubchenko, N.P

doi:10.1016/0032-3950(82)90451-8

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…[1][2][3][4][5] The object of most of these investigations was to describe the dependence of the IR absorption characteristics in terms of the stereoregular nature of the polymer chain. Sayyah et al 6 studied the IR spectra of PMMA samples doped with some luminescent materials.…”

Section: Introductionmentioning

confidence: 99%

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Infrared spectroscopic studies of poly(methyl methacrylate) doped with a new sulfur‐containing ligand and its cobalt(II) complex during γ‐radiolysis

Sayyah

El-Shafiey

Barsoum

et al. 2003

J of Applied Polymer Sci

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Infrared (IR) spectroscopy studies were performed for poly(methyl methacrylate) (PMMA) samples doped with an organic ligand or its cobalt(II) complex after the extraction of the dopant during ␥-radiolysis. There were no drastic changes in the IR absorption band position, but noticeable changes in the intensities were found. The relative transmission of IR absorption bands, such as those at 750, 840, 1065, and 1388 cm Ϫ1 , were measured according to the transmission of the carbonyl group band at 1717 cm Ϫ1. The degradation and recombination mechanism of different groups in the polymeric chain or backbone during radiolysis could be explained by the behavior of the relative transmission data for each group with increasing exposure dose. The tacticity of the PMMA samples was unchanged during radiolysis, and they were found to be syndiotactic. This was confirmed by the IR J values for different PMMA samples before and after irradiation. The protection efficiency of the organic ligand and its cobalt(II) complex was also investigated, and it was found that the organic ligand was more protective than the cobalt(II) complex for PMMA samples against ␥-rays.

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Section: Introductionmentioning

confidence: 99%

“…The infrared (IR) absorption of poly(methyl methacrylate) (PMMA) has been the subject of several investigations 1–5. The object of most of these investigations was to describe the dependence of the IR absorption characteristics in terms of the stereoregular nature of the polymer chain.…”

Section: Introductionmentioning

confidence: 99%

Infrared spectroscopic studies of poly(methyl methacrylate) doped with a new sulfur‐containing ligand and its cobalt(II) complex during γ‐radiolysis

Sayyah

El-Shafiey

Barsoum

et al. 2003

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The infrared absorption characteristics of poly (methyl methacrylate) (PMMA) have been the subject of several investigations [1][2][3][4][5]. The object of most of these investigations was to describe the dependence of the IR absorption characteristics in terms of the stereoregular nature of the polymer chain.…”

Section: Introductionmentioning

confidence: 99%

Infrared Studies on Polymethyl Methacrylate Doped with a Sulphur-Containing Ligand and Its Cobalt (II) Complex During Gamma Radiolysis

Sayyah

Khaliel

El-Shafiey

et al. 2005

International Journal of Polymeric Materials

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Infrared spectroscopic studies were performed for poly(methyl methacrylate) samples doped with an organic ligand (N,N-dioxaloyl benzenesulphonyl-N,Ndioxaloylthiocarbazide) and its cobalt (II) complex during gamma radiolysis after extraction of the dopant. There are no drastic changes in the IR-absorption band positions, but noticeable changes in the intensities are found. The relative transmission of IR-absorption bands such as bands at 750, 840, 1065, and 1388 cm À1 were measured relative to the transmission of the carbonyl group band at 1717 cm À1 . The degradation and recombination mechanism of different groups in the polymeric chain or backbone during radiolysis are suggested by the behavior of the relative transmission data for each group with increasing exposure dose. The tacticity of the PMMA sample was unchanged during radiolysis and was found to be syndiotactic. This fact is confirmed by measuring the IR J-values for different PMMA samples before and after irradiation. The protection efficiency of the organic ligand and its cobalt (II) complex were also investigated and the organic ligand is a more protective material than the cobalt (II) complex

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The infrared absorption characteristics of poly(methyl methacrylate) doped with luminescent materials

et al. 1987

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SAYYAH, AFIFI et al.: The infrared absorption characteristics of poly(methy1 methacrylate) Acta Polymerica 38 (1987) Nr. 7 443 t o t h e solvent and temperature i n t h e used range. These results are of great practical importance.The most relevant result is shown in Figure 4, which shows t h e carbonylic regions of t h e copolymers 13C-NMR spectra. It is observed t h a t there is n o separation of t h e carbonylic signals for t h e BM-MM-AA copolymer, while t h e carbonylic group of t h e BM-MM-MA copolymer is found clearly more unshielding t h a n t h a t of t h e esters as a result of its association with pyridine.The fact t h a t t h e BM-MM-AA acid group is n o t associated with pyridine was interpreted a s a result of strong internal interactions that give place t o t h e formation of acid dimers.The infrared spectra of poly(methy1 methacrylate) samples doped with different luminescent materials show no drastic changes in the position and intensity of the absorption bands, except in case of @-naphthol. From this it is supposed that there is no interaction between the dopant and PMMA with most of the investigated materials, while with B-naphthol hydrogen bonding between adjacent molecules in the polymer matrix is observed. Die Infrarotnbsorplion yon mit lumineszierenden Substanzen dotiertem Poly(rnethylmethacrylaf)Die Infrarotspektren von Poly(methylmethacry1at)-Proben, die mit verschiedenen lumineszierenden Substanzen dotiert wurden, weisen auRer beim B-Naphthol keine wesentlichen Anderungen der Lage iind Intensitlt der Absorptionsbanden auf. Daher wird angenommen, daR zwischen den meisten Dotierungsmitteln und PMMA lieine Wechselwirlcung besteht, wahrend beim @-Naphthol zwischen benachbarten Molekulen in der Polymermati i s Wasserstoffbindungen auftreten. MR-a6cop 6 y u nosumemusmemaicpuAama, codepxazyeeo momunecyup ymzyue npuMecuB IIH-enempax 06pa3qOB nonHMeTHnMeTaKpmnaTa, coDepmawHx p a 3 n~s~b r e n~o~~~e c q~p y~o~~e BemecTBa, 3aACKJIIoYeHHeM o6paaqa C @-Ha@TOJIOM, He ~a 6 n m~a e~c~1 3HaYHTeJIbHbIX H3MeHeHHP nOJlOH(t?HUFI II HHTeHCHBHOCTA nonoc a 6 c o p 6 q n~. n O 3 T O M y CYHTaeTCfI, YTO Memay nMMA EI 6OJIblZIHHCTBOM npHMeceii B3aHMOAefiCTEHFI He MMeeTCR, B TO BpeMFI H a K B CJIyYae @-Ha@TOJIa B nOJIHMepHOfi MaTpEIqe B03HHKaIoT BO)7,OPOHHbIe CBFI3H MemHy COCeAHHMEI MOJIeKyJIaMM Ministry of Education of Ukrainian SSR, Kiev Pedagogical Institute A. M. Gorki, Kiev/UkrSSRAn experimental method and a device for studying heat transfer coefficients in structurizing polymers have been workrd out. Experimental data on thermal conductivity, hrat conduction and volume heat capacity of systems on the hasis of epoxy oligomers a t curing are presented. The effect of different modifiers on the dynamics of the thermal properties is described.

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Synthesis of polyamides based on activated diesters of pyridinecarboxylic acids

Cited by 3 publications

References 3 publications

Infrared spectroscopic studies of poly(methyl methacrylate) doped with a new sulfur‐containing ligand and its cobalt(II) complex during γ‐radiolysis

Infrared spectroscopic studies of poly(methyl methacrylate) doped with a new sulfur‐containing ligand and its cobalt(II) complex during γ‐radiolysis

Infrared Studies on Polymethyl Methacrylate Doped with a Sulphur-Containing Ligand and Its Cobalt (II) Complex During Gamma Radiolysis

The infrared absorption characteristics of poly(methyl methacrylate) doped with luminescent materials

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