Synthesis and properties of novel X-type polyurethane containing dicyanovinylnitrocatechol of enhanced SHG thermal stability for electro-optic applications

Choe, Kang Yun; Lee, Ji‐Hyang; Lee, Ju‐Yeon

doi:10.1007/s00289-014-1193-3

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…Nonlinear optical materials have been attracting considerable attention due to their potential applications in the field of electro-optic devices including ultrafast optical switches, high-speed optical modulators, and high-density optical data storage media [1][2][3][4][5][6][7][8][9][10][11][12]. It is well known that organic and inorganic materials with high dipolar electronic systems exhibit large NLO effects.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electro-optic properties of novel X-type polyester containing dioxynitrobenzylidenecyanoacetate with highly enhanced thermal stability of dipole alignment

Choe

Lee

2015

Polym. Bull.

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Novel X-type polyester 5 containing 5-nitro-2,4-dioxybenzylidenecyanoacetate groups as nonlinear optical (NLO) chromophores, which constitute parts of the polymer backbone, was prepared and characterized. Polyester 5 is soluble in common organic solvents such as N,N-dimethylformamide and acetone. Polymer 5 shows a thermal stability up to 280°C from thermogravimetric analysis with glass-transition temperature obtained from differential scanning calorimetry of near 116°C. The second harmonic generation (SHG) coefficient (d 33 ) of poled polymer film at the 1064 nm fundamental wavelength is 1.78 pm V -1 . The dipole alignment exhibits a thermal stability even at 4°C higher than glass-transition temperature (T g ), and no significant SHG decay is observed below 120°C due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.

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Section: Introductionmentioning

confidence: 99%

Synthesis and electro-optic properties of novel X-type polyester containing dioxynitrobenzylidenecyanoacetate with highly enhanced thermal stability of dipole alignment

Choe

Lee

2015

Polym. Bull.

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“…The compressive behavior and the stability of mortar and concrete are expected to be simultaneously enhanced by the integration of nanoparticles and PCE. 12,13 Due to the good dispersibility of nano-silica (NS), they are expected to have a significant role in building materials. However, the uniform dispersion of NS in cementitious materials has always been a difficult problem, and the traditional ultrasonic dispersion method is not suitable for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of allyl ether-based polycarboxylate superplasticizer with short-branched chains modified by nano-silica

Qiu

Mao

Zhang

et al. 2022

Journal of Chemical Research

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The combination of nanoparticles and polycarboxylate ether superplasticizers is expected to simultaneously improve the durability and mechanical properties of mortar and concrete. However, the uniform dispersion of nanoparticles in cement materials has always been a difficult challenge. In this paper, nanoparticles are modified with surfactants to provide a research direction for better dispersion of nanoparticles in cementitious materials. Modified allyl ether polycarboxylate superplasticizer with short-branched chains was synthesized from acrylic acid and allyl glycidyl ether. Nano-silica/polycarboxylate ether was obtained by grafting nano-silica onto polycarboxylate ether molecular chains through intermolecular dehydration, thus achieving a homogeneous dispersion of nano-silica in the cementitious material. The results show that nano-silica/polycarboxylate ether has better dispersibility in cement matrix and strong clay resistance, which compensates for the poor dispersion of polycarboxylate ether synthesized from conventional polyethylene glycol graft chains in the presence of clay impurities.

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Comb-typed polycarboxylate superplasticizer equiped with hyperbranched polyamide teeth

Zhu

Zhang

Min

et al. 2018

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Synthesis and properties of novel X-type polyurethane containing dicyanovinylnitrocatechol of enhanced SHG thermal stability for electro-optic applications

Cited by 6 publications

References 32 publications

Synthesis and electro-optic properties of novel X-type polyester containing dioxynitrobenzylidenecyanoacetate with highly enhanced thermal stability of dipole alignment

Synthesis and electro-optic properties of novel X-type polyester containing dioxynitrobenzylidenecyanoacetate with highly enhanced thermal stability of dipole alignment

Preparation and properties of allyl ether-based polycarboxylate superplasticizer with short-branched chains modified by nano-silica

Comb-typed polycarboxylate superplasticizer equiped with hyperbranched polyamide teeth

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