Results 31 to 40 of about 10,811 (230)

Thermal-Mechanical Properties of Polyurethane-Clay Shape Memory Polymer Nanocomposites [PDF]

open access: yes, 2010
Shape memory nanocomposites of polyurethane (PU)-clay were fabricated by melt mixing of PU and nano-clay. Based on nano-indentation and microhardness tests, the strength of the nanocomposites increased dramatically as a function of clay content, which is
Chen, Zhen Guo,   +7 more
core   +5 more sources

Surface treatment with UV-ozone to improve adhesion of vulcanized rubber formulated with an excess of processing oil [PDF]

open access: yes, 2014
An excess of processing oil was intentionally added in the formulation of vulcanized styrene-butadiene rubber for analyzing the effect on the treatment with UV radiation combined with ozone (UV-ozone) in improving the adhesion to waterborne polyurethane ...
Martín-Martínez, José Miguel   +1 more
core   +2 more sources

Cellulose nanocrystals composites with excellent thermal stability and high tensile strength for preparing flexible resistance strain sensors

open access: yesCarbohydrate Polymer Technologies and Applications, 2022
In recent years, flexible strain sensors for human movement monitoring have received great attention. However, the preparation of strain sensors with high sensitivity and tensile strength has remained a challenge. In this study, the mechanical properties
Yunfei Zhang   +3 more
doaj  

Comparative Study on the Performance of Solvent-Based and Waterborne Polyurethane Top-Coats in Laboratory Accelerated Test and Field Test [PDF]

open access: yesCailiao Baohu
Taking solvent-based acrylic polyurethane top-coat and waterborne aliphatic polyurethane top-coat as the research objects, this study explored the effects of two laboratory accelerated aging methods (neutral salt spray, xenon lamp aging) and natural ...
MA Kaijun, XUE Fengying, ZHANG Zhiyou, CHEN Zhangfeng
doaj   +1 more source

Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method

open access: yesMolecules, 2023
A waterborne polyurethane dispersion for foamed synthetic leather base was designed and prepared using prepolymer method. There are many variables in the emulsification and chain-extension process of waterborne polyurethane (WPUR) dispersions prepared by
Lijuan Sun, Hongmei Jiang
doaj   +1 more source

A machine learning accelerated inverse design of underwater acoustic polyurethane coatings with cylindrical voids [PDF]

open access: yesarXiv, 2022
Here, we report the development of a detailed "Materials Informatics" framework for the design of acoustic coatings for underwater sound attenuation through integrating Machine Learning (ML) and statistical optimization algorithms with a Finite Element Model (FEM).
arxiv  

Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating

open access: yesMolecules, 2019
With the enhancement of people’s environmental awareness, waterborne polyurethane (PU) paint—with its advantages of low release of volatile organic compounds (VOCs), low temperature flexibility, acid and alkali resistance, excellent solvent ...
Linglong Kong   +10 more
doaj   +1 more source

Low-Threshold and Narrow Linewidth Diffusive Random Lasing in Rhodamine 6G Dye-Doped Polyurethane with Dispersed ZrO$_2$ Nanoparticles [PDF]

open access: yesJ. Opt. Soc. Am. B 31, 2363-2370, (2014), 2015
We report on low-threshold and narrow linewidth intensity feedback random lasing in Rhodamine 6G dye-doped polyurethane with dispersed ZrO$_2$ nanoparticles. Depending on the dye/particle concentration, the lasing threshold is (6.8--15.4) MW/cm$^2$ and the linewidth is (4--6) nm. The lasing threshold as a function of nanoparticle concentration is found
arxiv   +1 more source

Design, synthesis and characterization of inks based in waterborne polyurethane urea dispersions suitable for direct ink writing 3D-printing. [PDF]

open access: yes, 2020
330 p.A series of waterborne polyurethane urea dispersions were prepared to study their viability as inks for direct ink writing 3D-printing. In this context, waterborne polyurethane urea dispersions were successfully synthesized using a hydrophilic ...
Vadillo del Ser, Julen
core   +3 more sources

Preparation of graphene oxide/ waterborne polyurethane via boric acid cross-linked dopamine enhanced barrier and mechanical properties

open access: yesFrontiers in Materials, 2022
Herein, a simple and efficient strategy was proposed to improve the gas barrier properties of waterborne polyurethane (WPU). Graphene oxide was first modified with dopamine and then cross-linked by boric acid (BA) to bring the graphene sheets closer ...
Xinxin Tian   +12 more
doaj   +1 more source

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