Synthesis and characterization of new poly(ester-amide)s containing diarylidenecyclohexanone in the main chain. Part: II

Khairou, Khalid S.; Abdullah, Mohamed Ahmed; Aly, Kamal I.; Nahas, Nariman M.; Al-Bonian, Ameena M.

doi:10.1016/j.arabjc.2009.07.001

Cited by 9 publications

(10 citation statements)

References 17 publications

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“…The IR spectra of all the five poly(ester-amides) showed characteristic absorption at = 1630-1750 cm -1 due to ester and amide C=O stretching frequency and an absorption at = 3280-3380 cm -1 due to the amide N-H stretching frequency. Similar observations were made by Khairou et al [19] in a new series of poly(esteramides) containing diarylidenecyclohexanone in the main chain. They are represented in Figs.…”

Section: Spectral Studiessupporting

confidence: 71%

“…5(a) and (b) respectively. It shows reflection peaks in the region 2θ = 10 -50° [19] which indicates their semicrystallinity with an amorphous background. The presence of C=O and C=C groups induces some degree of crystallinity.…”

Section: X-ray Diffraction Studiesmentioning

confidence: 99%

“…The signal in the range of  188-200 ppm in the 13 C NMR spectra of the poly(ester-amides) is due to the carbonyl carbon of the -unsaturated ketone. The signals in the range of  171-185 ppm and  160-170 ppm are due to the carbonyl carbon of the amide and ester groups [19] which indicates the formation of poly(ester-amide). They are represented in Figs.…”

Section: Spectral Studiesmentioning

confidence: 99%

“…Kannappan et al [18] were investigated the rate of photocrosslinking behavior of random copolyesters with arylidene-keto moiety by UV spectral studies. Even the poly(ester-amides) was synthesized by making use of arylidene-keto moieties [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization and Photocrosslinkable Studies of Certain Thermotropic Liquid Crystalline Poly(ester-amides)

Kalappa¹,

Antony²,

Ramalakshmi³

2018

JACS

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Five thermotropic liquid crystalline poly(ester-amides) were synthesized by polycondensation method using varying dicarboxylic acids with a common diamine namely 4,4'-diaminodiphenyl and a common diol namely 2,6-bis(4-hydroxy-3-methoxybenzylidene)cyclohexanone (CHBV). The solubility data and viscosity measurements of these synthesized poly(ester-amides) were used for qualitative characterization. The spectroscopic techniques such as FT-IR, 1 H NMR, 13 C NMR were performed for investigating micro structural features. By differential scanning calorimetry (DSC), the thermal phase transition behavior of these poly(ester-amides) was studied. Scanning electron microscopy (SEM) technique was used to investigate the morphology of these poly(ester-amides). By using UV-visible spectroscopic technique, the photocrosslinkability of these poly(ester-amides) were studied by irradiating these poly(ester-amides) under a 160 W medium pressure mercury lamp. SEM analysis of these UV irradiated poly(ester-amides) showed the changes in morphology. Thus, the poly(esteramides) containing arylidene keto moiety in the main chain exhibited nematic mesophase and were photocrosslinked upon UV irradiation. X-ray diffraction (XRD) patterns of these poly(ester-amides) were taken to assess the degree of crystallinity.

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Section: Spectral Studiessupporting

confidence: 71%

Section: X-ray Diffraction Studiesmentioning

confidence: 99%

Section: Spectral Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization and Photocrosslinkable Studies of Certain Thermotropic Liquid Crystalline Poly(ester-amides)

Kalappa¹,

Antony²,

Ramalakshmi³

2018

JACS

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“…The ester carbonyl was assigned by the signal around 161-164ppm and amide group at 166 ppm. [26,27] This shows the incorporation of all the three monomers in the polymer backbone.…”

Section: Solubility Of Copolyesteramidesmentioning

confidence: 99%

Synthesis and Studies on Certain Semiconducting Copolyesteramides Containing 2, 5-Pyridine Dicarboxylic Acid and their Photocross linkable Blend Nanofibers

Rajam¹,

Roopsingh²

2016

IJAERS

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Triblock Copolymers Based on Monohydroxy Polystyrene with Crystallizable Amide Segments: Synthesis and Characterization

et al. 2015

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Four series of triblock copolymers are studied, which are synthesized by reacting monofunctionalized polystyrene with crystallizable amide segments such as diamide (T T and T6T) and tetraamide (T6T6T and T6A6T). The difunctional amide segment consists of two terephthalic groups at the outside (T). The length of the soft segment changed from 1000 to 8000 g/mol using difunctionalized polystyrene (PSt) and thereby the concentration of the hard segment is varied from 35 to 4 wt%. The molecular weight of the triblock copolymer is determined by the inherent viscosity measurement method. The FT-IR results reveal that the degree of crystallinity of the amide segments in the copolymer is high 79%. The differential scanning calorimetry shows the T g for amorphous polystyrene and T m for crystallizable hard segments. Depending on the amide concentration in the copolymer, the diamide and tetraamide melting temperature ranged between 125 to 280°C. All the thermogravimetric data reveal that the polymer shows single-stage decomposition temperature centered around 410°C. The solvent resistivity of these materials is very high even at a low concentration of (4%) amide content. All the copolymers show low water absorption. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2016, , 21541; View this article online at wileyonlinelibrary.com.

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Synthesis and characterization of new poly(ester-amide)s containing diarylidenecyclohexanone in the main chain. Part: II

Cited by 9 publications

References 17 publications

Synthesis, Characterization and Photocrosslinkable Studies of Certain Thermotropic Liquid Crystalline Poly(ester-amides)

Synthesis, Characterization and Photocrosslinkable Studies of Certain Thermotropic Liquid Crystalline Poly(ester-amides)

Synthesis and Studies on Certain Semiconducting Copolyesteramides Containing 2, 5-Pyridine Dicarboxylic Acid and their Photocross linkable Blend Nanofibers

Triblock Copolymers Based on Monohydroxy Polystyrene with Crystallizable Amide Segments: Synthesis and Characterization

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