Liquid crystalline photoactive hyperbranched and linear benzylidene polyester with terminal epoxy and pendant hydroxyl groups

Murali, M.; Rao, V. Pandu Ranga; Samui, A. B.

doi:10.1002/pola.22066

Cited by 18 publications

(28 citation statements)

References 54 publications

(63 reference statements)

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“…Diol {2, 6‐bis(4‐hydroxybenzylidene)‐4‐phenylcyclohexanone} and triol {2, 6‐bis(4‐hydroxybenzylidene)‐4‐hydroxyphenylcyclohexanone} were synthesized by following same procedure as reported in our earlier communication 34(c). 4‐Phenylcyclohexanone and 4‐hydroxyphenylcyclohexanone were used in place of cyclohexanone for diol and triol, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Diepoxide {2, 6‐bis(4‐epoxypropoxybenzylidene)‐4‐phenylcyclohexanone} and triepoxide {2,6‐bis(4‐epoxypropoxybenzylidene)‐4‐epoxypropoxyphenylcyclohexanone} were synthesized by following same procedure as reported in our earlier communications 34(c)…”

Section: Methodsmentioning

confidence: 99%

“…Photoactive liquid crystalline hyperbranched polyester epoxies with pendant hydroxyl groups were synthesized by polyaddition of photoactive bis benzylidene alkanone diepoxy/triepoxy monomer with isophthalic acid/terephthalic acid/trimesic acid using same procedure as reported in our earlier communications 34(c). Reaction is shown in Scheme .…”

Section: Methodsmentioning

confidence: 99%

“…In principle, two different strategies have been employed for the incorporation of mesogenic structural elements into cascade‐branched architecture; either mesogen can be part of each branching monomer or it can be coupled to the end group of scaffold. Ringsdorf and coworkers,30 Jin and coworkers,33 and later our group34 also reported on dendritic polymers with mesogens in the branching unit. There were numerous reports from Frey and coworkers,32 Shibaev and coworkers,31 and others on liquid crystalline dendritic polymers with mesogens coupled to the end groups.…”

Section: Introductionmentioning

confidence: 91%

“…In continuation to our previous work on linear and hyperbranched photoactive LCPs,34 we attempt here the effect of incorporation of kinked structure and different synthetic approaches such as A 2 + B 2 , A 2 + B 3 , A 3 + B 2 , and A 3 + B 3 on phase behavior and photoactive properties of benzylidene based linear and hyperbranched polymers.…”

Section: Introductionmentioning

confidence: 99%

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A series of linear and hyperbranched polyester epoxies, with varied structural parameters such as kinked structure and different dendritic architectures, were synthesized by A2 + B2, A2 + B3, A3 + B2, and A3 + B3 approaches. The structures of synthesized monomers and polymers were confirmed by Fourier transform infrared, 1H NMR, and 13C NMR spectroscopic techniques. The effect of varied structural parameters on phase behavior and photoresponsive properties was investigated by using differential scanning calorimeter, thermal optical polarized microscope, UV–visible spectroscopy, photoviscosity, and refractive index studies. The transition temperatures of hyperbranched polymers were higher than that of the corresponding linear analogues. All the polymers showed nematic phase (nematic droplets) over a broad temperature range. The effect of kinked structural unit on photoresponsive property is less in both linear and hyperbranched architectures. Although the effect of architectural nature is highly considerable within the hyperbranched architectures, the polymer (HPE–33) synthesized by A3 + B3 approach showed highest rate of photocrosslinking, followed by HPE–I 32; HPE–T 32, and HPE–23, which were synthesized by A3 + B2 and A2 + B3 approaches, respectively. The findings in photoresponsive properties were further supported by molecular modeling studies. Substantial variation of refractive index (0.015–0.024) indicates that these polymers could be used for optical recording. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Adenosine diphosphate‐ribosylation factor 6 is required for epidermal growth factor‐induced glioblastoma cell proliferation

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et al. 2009

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Dendrimeric and Hyperbranched Liquid Crystal Structures

Hernández‐Ainsa

Marcos²,

Serrano

2014

Handbook of Liquid Crystals

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Synthesis and curing of liquid crystalline epoxy resin based on asymmetric mesogen

Xiao

Cao

Feng

et al. 2012

J of Applied Polymer Sci

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A novel liquid crystalline epoxy resin (LCER) derived from asymmetric mesogen unit was synthesized. Its structure and liquid crystalline behavior were characterized by hydrogen nuclear magnetic resonance (H-NMR), differential scanning calorimetry (DSC), polarized optical microscopy (POM). The results indicated that the LCER converted to a nematic phase at 85 C during heating and finally became isotropic at 145 C. The curing behavior and phase behavior of the LCER with 4,4 0 -diaminodiphenyl methane and methyl hexahydrophthalic anhy-dride were also studied by DSC and POM, respectively. Their apparent activation energy (E a ) was evaluated according to the Ozawa's isoconversional method. The results suggested that autocatalytic reaction had occurred in these two systems.

show abstract

Liquid crystalline photoactive hyperbranched and linear benzylidene polyester with terminal epoxy and pendant hydroxyl groups

Cited by 18 publications

References 54 publications

Adenosine diphosphate‐ribosylation factor 6 is required for epidermal growth factor‐induced glioblastoma cell proliferation

Adenosine diphosphate‐ribosylation factor 6 is required for epidermal growth factor‐induced glioblastoma cell proliferation

Dendrimeric and Hyperbranched Liquid Crystal Structures

Synthesis and curing of liquid crystalline epoxy resin based on asymmetric mesogen

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