Polymerizable Hydrophobically Modified Ethoxylated Urethane Acrylate Polymer: Synthesis and Viscoelastic Behavior in Aqueous Systems

2020 ◽  
Vol 53 (17) ◽  
pp. 7420-7429
Author(s):  
Tao Guan ◽  
Zhukang Du ◽  
Jun Peng ◽  
Dongli Zhao ◽  
Ning Sun ◽  
...  
Keyword(s):  
Viscoelastic Behavior ◽  
Polymer Synthesis ◽  
Urethane Acrylate ◽  
Aqueous Systems ◽  
Hydrophobically Modified ◽  
Acrylate Polymer

Eco-friendly castor oil-based UV-curable urethane acrylate zinc oxide nanocomposites: Synthesis and viscoelastic behavior

2019 ◽  
Vol 54 (1) ◽  
pp. 101-110 ◽  
Author(s):  
Abbas Madhi ◽  
Behzad S Hadavand
Keyword(s):  
Zinc Oxide ◽  
Castor Oil ◽  
Zinc Oxide Nanoparticles ◽  
Viscoelastic Behavior ◽  
Environmentally Friendly ◽  
Urethane Acrylate ◽  
Nano Zno ◽  
Uv Curable ◽  
Maximum Value

Attention to environmental problems and the importance of maintaining it have caused the researchers to pay more attention in this regard. The production of polymers and resins has increased in recent years and has affected by environmental pollution due to their long-term degradation. An appropriate solution to this problem is the synthesis of degradable and environmentally friendly polymers and resins. Using natural materials in the synthesis of polymers and resins can help them to be environmentally friendly. The purpose of this research is to synthesize urethane acrylate resins using natural resources. For this purpose, the urethane acrylate pre-polymer was synthesized with castor oil. Then, using modified zinc oxide nanoparticles with 1, 3 and 5 wt% urethane acrylate zinc oxide nanocomposites were produced. The use of castor oil as a degradable part and lack of organic solvent in radiation systems led to the creation of an environmentally friendly resin. Subsequently, the viscoelastic behavior of the prepared nanocomposite was evaluated. Spectrometry results confirm the synthesized resin structure. The morphology of nanocomposites confirmed the proper particle size distribution in a 3 wt.% sample. The results of the dynamic mechanical thermal analysis test showed that increasing the amount of modified nano ZnO could increase the glass transition temperature, and the maximum value was observed in 5 wt.% modified nano ZnO (69.7℃).

Viscoelastic Behavior of Aqueous Solutions of Hydrophobically-Modified Water-Soluble Polypeptides

2008 ◽  
Author(s):  
Katsuhiro Inomata ◽  
Tomokazu Takai ◽  
Hideki Sugimoto ◽  
Eiji Nakanishi ◽  
Albert Co ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Viscoelastic Behavior ◽  
Water Soluble ◽  
Hydrophobically Modified

Light Scattering Study of Semidilute Aqueous Systems of Chitosan and Hydrophobically Modified Chitosans

1998 ◽  
Vol 31 (23) ◽  
pp. 8142-8148 ◽  
Author(s):  
Anna-Lena Kjøniksen ◽  
Christian Iversen ◽  
Bo Nyström ◽  
Torgeir Nakken ◽  
Odd Palmgren
Keyword(s):  
Light Scattering ◽  
Aqueous Systems ◽  
Hydrophobically Modified ◽  
Scattering Study

Linear and nonlinear rheological responses in aqueous systems of hydrophobically modified chitosan and its unmodified analogue

1997 ◽  
Vol 39 (6) ◽  
pp. 747-754 ◽  
Author(s):  
Christian Iversen ◽  
Anna-Lena Kjøniksen ◽  
Bo Nyström ◽  
Torgeir Nakken ◽  
Odd Palmgren ◽  
...  
Keyword(s):  
Aqueous Systems ◽  
Modified Chitosan ◽  
Hydrophobically Modified ◽  
Linear And Nonlinear

Influence of Polymer Charge, Temperature, and Surfactants on Surface Sizing of Liner and Greaseproof Paper With Hydrophobically Modified Starch

TAPPI Journal ◽  
2009 ◽  
Vol 8 (2) ◽  
pp. 33-38 ◽  
Author(s):  
ANNA JONHED ◽  
LARS JÄRNSTRÖM
Keyword(s):  
Phase Separation ◽  
Contact Angles ◽  
Low Ph ◽  
Hydrophobically Modified ◽  
Paper Sizing ◽  
Surface Sizing ◽  
Separation Temperature ◽  
Hydrophobic Nature ◽  
Sizing Agents ◽  
Charge Temperature

The aim of this study was to investigate the properties of hydrophobically modified (HM) quaterna-ry ammonium starch ethers for paper sizing. These starches possess temperature-responsive properties; that is, gelation or phase separation occurs at a certain temperature upon cooling. This insolubility of the HM starches in water at room temperature improved their performance as sizing agents. The contact angles for water on sized liner were substantially larger than on unsized liner. When the application temperature was well above the critical phase-separation temperature, larger contact angles were obtained for liner independently of pH compared with those at the lower application temperature. Cobb60 values for liner decreased upon surface sizing, with a low pH and high application temperature giving lower water penetration. Contact angles on greaseproof paper decreased upon sur-face sizing as compared to unsized greaseproof paper, independently of pH and temperature. Greaseproof paper showed no great difference between unsized substrates and substrates sized with HM starch at different pH. This is probably due to the already hydrophobic nature of greaseproof paper. However, the Cobb60 values increased at low pH and low application temperature. Surfactants were added to investigate how they affect the sized surface. Addition of surfactant reduces the contact angles, in spite of indications of complex formation.

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