Characterization of the flame retardancy of EVA copolymer by plasma grafting of acrylic acid

A novel phosphorus-silicon containing flame-retardant DOPO-V-PA was used to wrap carbon nanotubes (CNTs). The results of FTIR, XPS, TEM and TGA measurements exhibited that DOPO-V-PA has been successfully grafted onto the surfaces of CNTs, and the CNTs-DOPO-V-PA was obtained. The CNTs-DOPO-V-PA was subsequently incorporated into epoxy resin (EP) for improving the flame retardancy and dispersion. Compared with pure EP, the addition of 2 wt% CNTs-DOPO-V-PA into the EP matrix could achieve better flame retardancy of EP nanocomposites, such as a 30.5% reduction in peak heat release rate (PHRR) and 8.1% reduction in total heat release (THR). Furthermore, DMTA results clearly indicated that the dispersion for CNTs-DOPO-V-PA in EP matrix was better than pristine CNTs.

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Synthesis and Theoretical Investigation Using DFT of 2,3-Diphenylquinoxaline Derivatives for Electronic and Photovoltaic Effects

Journal of Electronic Materials ◽

10.1007/s11664-021-09041-0 ◽

2021 ◽

Author(s):

Dorota Zając ◽

Dariusz Przybylski ◽

Jadwiga Sołoducho

Keyword(s):

Solar Cells ◽

Acrylic Acid ◽

Organic Semiconductors ◽

Organic Solar Cells ◽

Molecular Design ◽

Low Cost ◽

Design Synthesis ◽

Semiconducting Properties ◽

Homo Lumo

AbstractDeveloping effective and low‐cost organic semiconductors is an opportunity for the development of organic solar cells (OPV). Herein, we report the molecular design, synthesis and characterization of two molecules with D–A–D–A configuration: 2-cyano-3-(5-(8-(3,4-ethylenodioxythiophen-5-yl)-2,3-diphenylquinoxalin-5-yl)thiophen-2-yl)acrylic acid (6) and 2-cyano-3-(5-(2,3-diphenyl-8-(thiophen-2-yl)quinoxalin-5-yl)thiophen-2-yl)acrylic acid (7). Moreover, we investigated the structural, theoretical and optical properties. The distribution of HOMO/LUMO orbitals and the values of the ionization potential indicate good semiconducting properties of the compounds and that they can be a bipolar material. Also, the optical study show good absorption in visible light (λabs 380–550 nm). We investigate the theoretical optoelectronic properties of obtained compounds as potential materials for solar cells.

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Synthesis and Characterization of Poly(acrylic acid)-graft-poly(vinylidene fluoride) Copolymers and pH-Sensitive Membranes

Macromolecules ◽

10.1021/ma0112568 ◽

2002 ◽

Vol 35 (3) ◽

pp. 673-679 ◽

Cited By ~ 117

Author(s):

Lei Ying ◽

Peng Wang ◽

E. T. Kang ◽

K. G. Neoh

Keyword(s):

Acrylic Acid ◽

Vinylidene Fluoride ◽

Ph Sensitive ◽

Synthesis And Characterization ◽

Poly Vinylidene Fluoride ◽

Poly Acrylic Acid

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Preparation and characterization of pH-sensitive, interpenetrating networks of poly(vinyl alcohol) and poly(acrylic acid)

Journal of Applied Polymer Science ◽

10.1002/app.1995.070550610 ◽

1995 ◽

Vol 55 (6) ◽

pp. 919-928 ◽

Cited By ~ 140

Author(s):

Linda F. Gudeman ◽

Nikolaos A. Peppas

Keyword(s):

Acrylic Acid ◽

Vinyl Alcohol ◽

Ph Sensitive ◽

Poly Vinyl Alcohol ◽

Interpenetrating Networks ◽

Poly Acrylic Acid

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Preparation and Characterization of Hydrophilic PVDF Hollow Fiber Ultrafiltration Membrane

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.480-481.201 ◽

2011 ◽

Vol 480-481 ◽

pp. 201-206

Author(s):

Li Guo Wang ◽

Xiu Ju Wang ◽

Ai Min Wang ◽

Wen Juan Liu ◽

Shi Qi Guo ◽

...

Keyword(s):

Acrylic Acid ◽

Hollow Fiber ◽

Polyvinylidene Fluoride ◽

Breaking Strength ◽

Pure Water ◽

Water Flux ◽

Technical Parameters ◽

Rupture Pressure ◽

Pure Water Flux

Hydrophilic Polyvinylidene fluoride (PVDF) hollow fiber ultrafiltration membranes were prepared by wet-spinning method. The effects of technical parameters of acrylic acid grafted onto PVDF on the performance of hydrophilic PVDF membranes were investigated via orthogonal test, the technical parameters of preparation of hydrophilic PVDF membranes were determined, and hydrophilic PVDF membranes were prepared. Then hydrophilic PVDF membranes were characterized in terms of breaking strength, breaking elongation, rupture pressure, pure water flux and rejection. The fouling properties and the conditions of acrylic acid grafted onto PVDF were also examined. The results showed that acrylic acid had been grafted onto PVDF, the breaking strength and rupture pressure improved greatly, and the fouling properties were better than PS hollow fiber UF membrane.

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