Photocrosslinked polymers based on pendant extended chalcone as photoreactive moieties

Rehab, Ahmed; Salahuddin, Nehal

doi:10.1016/s0032-3861(98)00460-1

Cited by 92 publications

(57 citation statements)

References 26 publications

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“…The poly(DCP-co-HEA) and poly(DCP-co-S) (Fig. 2) were prepared in EMK by a free radical polymerization technique and were characterized by FT-IR, 1 HNMR and UV-Vis to confirm the structure. The FT-IR spectrum of the DHP, DCP and poly(DCP) is shown in the Fig.…”

Section: Resultsmentioning

confidence: 99%

“…ALPHA BRUKER FT-IR spectrophotometer was used for recording IR spectrum and the spectra were recorded using KBr pellet method. 1 H NMR spectra of the samples were run on a Bruker FT-NMR spectrophotometer operating at 500 MHz using CDCl 3 or DMSO-d 6 as a solvent and tetramethyl silane (TMS) as an internal reference. UV absorption measurements were recorded using LABINDIA model UV 320 instrument by dissolving polymer samples in tetrahydrofuran (THF).…”

Section: Methodsmentioning

confidence: 99%

“…In recent years, polymers containing photoreactive functional groups have received increasing attention in scientific research since the photochemical reactions can induce many changes in physicochemical properties such as solubility, optical transparency, dielectric constant and refractive index [1,2]. At the same time, photosensitive polymers have acquired significant importance in various industrial applications, such as optical waveguide materials [3], macro and microlithography [4], liquid crystalline displays [5], holographic head-up displays [6] and so on.…”

Section: Introductionmentioning

confidence: 99%

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Photocrosslinkable polymer based on 4-(3-(2,4-dichlorophenyl)-3-oxoprop-1-enyl) phenylacrylate: synthesis, reactivity ratio, and crosslinking studies

Suresh

Karthik

Arun

2016

Materials Science-Poland

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The acrylate monomer was synthesized by two step process. 2,4-dichloro-1-ene(4-hydroxyphenyl)phenone (DHP) was synthesized using 4-hydroxy benzaldehyde and 2,4-dichloro acetophenone. 4-[3-(2,4-dichloro-phenyl)3-oxoprop-1-en-1-yl]phenylacrylate (DCP) was prepared by reacting DHP with acryloyl chloride. The synthesized monomer was copolymerized with 2-hydroxyethyl acrylate and styrene using solution polymerization technique. Monomer and polymers were characterized by IR, NMR and UV techniques. The average molecular weight of the polymer was around 4000 g/mol. First and second decomposition temperature of the polymers was around 320°C and 430°C, respectively. The reactivity ratio of the polymers was calculated by Fineman-Ross, Kelen-Tudos and extended Kelen-Tudos methods. The synthesized monomer has been less reactive than the commercial monomer. The rate of photocrosslinking increased from 39 % to 99 % due to the using of copolymerization technique.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photocrosslinkable polymer based on 4-(3-(2,4-dichlorophenyl)-3-oxoprop-1-enyl) phenylacrylate: synthesis, reactivity ratio, and crosslinking studies

Suresh

Karthik

Arun

2016

Materials Science-Poland

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“…The problem with the absorption spectral band at 1601 cm À1 is that it is normally superposed with the absorption bands of the double bonds in the benzene ring, but the benzene ring is not effected by UV light and the other two absorptions of the double bonds in the ring are not changed, thus any change in the absorption at 1601 cm À1 is due to a breaking of the double bond in chalcone. 13,16,24 By monitoring the behaviour of the 1601 cm À1 absorption the extent of photocrosslinking can be investigated but trans-cis isomerization can not be followed.…”

Section: Comparison Of Uv-vis and Infrared Spectroscopic Studymentioning

confidence: 99%

Synthesis and Characterization of Main Chain Polyimides Containing Chalcone Derivatives for LC Alignment

Selo

Skarp

Hilborn

2006

Polym J

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ABSTRACT:Two soluble polyimides containing chalcone derivatives in the main chains were successfully prepared using the Mitsunobu reaction at room temperature, reacting diols with diimides. With this reaction procedure the high temperature imidization step normally needed for the synthesis of polyimides is avoided and the polymers can be used for temperature sensitive applications. The main chain polyimides were characterized with FT-IR, NMR and DSC and the extent of the photoreaction was measured with FT-IR and UV-vis spectroscopy. Isobestic points were observed in the absorption spectral changes at the early stage of UV irradiation as a result of a single photochemical process. Further photoirradiation is accompanied by deviation from the isobestic points, implying that another photochemical process has started. With FT-IR investigations it was concluded that photodimerization is the process occurring at low UV exposure doses and that trans-cis isomerization is starting simultaneously at higher doses. The optical anisotropic properties were investigated upon exposure of the polymers as thin films to linearly polarized UV (LPUV) light of different doses. Selected crosslinking in the parallel direction relative to the direction of the LPUV light and subsequent optical anisotropy in the film were achieved.

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“…Polymers with photofunctional groups like the photopolymer containing 1,3-bis(4-hydroxyphenyl)-propenene, 12 poly(4-[5-(4-hydroxyphenyl)-3-oxopenta-1,4-dienyl]-phenyl-2-methacrylate), 13 polymers with bis(benzylidene)cyclohexanone units, 14 poly(dimethylmaleimide methacrylate), 15 poly(nonbornene derivative)s, 16 poly[(2 -4-bromobenzoyl)-4-styryloxyhexylmethacrylate], 17 poly(propylene fumarate), 18 methacrylate polymers comprising 2-cinnamoyloxyethoxybiphenyl side groups, 19 poly[(4-ethylphenoxy)-(phenoxy)phosphazene], 20 2-(dimethylmaleimido)-N-et-hylacrylamide, 21 poly(4-trimethylsilylmethyl styrene) thin films, 22 photosensitive poly(amic acid)s, 23 photochromic spiroxazine polymers containing a chalcone moiety, 24 poly(acryloyloxy styryl phenyl ketone) 25 and poly(2-trimethylsilyl-2-propyl methacrylate) 26 are some of the photoresists reported in the literature.…”

mentioning

confidence: 99%

Synthesis, characterization and properties of photoresponsive polymers comprising photocrosslinkable pendant chalcone moieties

Tamilvanan

Pandurangan

Reddy

et al. 2006

Polymer International

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New methacrylate monomers, namely 4-methacryloyloxyphenyl-4 -fluorostyryl ketone and 4-methacryloyloxyphenyl-4 -ethylstyryl ketone comprising a free radical polymerizable group and a photocrosslinkable group, were synthesized by reacting the respective hydroxychalcones with methacryloyl chloride in the presence of triethylamine. The monomers were polymerized in the presence of ethyl methyl ketone (EMK) at 70• C using benzoyl peroxide as the initiator. The chemical structures were characterized using various spectroscopic techniques: ultraviolet, Fourier transform infrared, 1 H NMR and 13 C NMR. The thermal stability of the polymers was studied using thermogravimetric analysis in nitrogen atmosphere. Differential scanning calorimetry was used to determine the glass transition temperature of the homopolymers. Photocrosslinking of the synthesized homopolymers was investigated in solution. The two homopolymers were crosslinked within 10-15 min. After crosslinking, the homopolymers were insoluble in the same solvent.

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Photocrosslinked polymers based on pendant extended chalcone as photoreactive moieties

Cited by 92 publications

References 26 publications

Photocrosslinkable polymer based on 4-(3-(2,4-dichlorophenyl)-3-oxoprop-1-enyl) phenylacrylate: synthesis, reactivity ratio, and crosslinking studies

Photocrosslinkable polymer based on 4-(3-(2,4-dichlorophenyl)-3-oxoprop-1-enyl) phenylacrylate: synthesis, reactivity ratio, and crosslinking studies

Synthesis and Characterization of Main Chain Polyimides Containing Chalcone Derivatives for LC Alignment

Synthesis, characterization and properties of photoresponsive polymers comprising photocrosslinkable pendant chalcone moieties

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