A study on Mechanical properties of Waterborne polyurethane dispersion by Monoammonium phosphate

2013 ◽  
Vol 30 (2) ◽  
pp. 264-271
Author(s):  
Joo-Youb Lee ◽  
◽  
Ki-Jun Kim
Keyword(s):  
Mechanical Properties ◽  
Waterborne Polyurethane ◽  
Monoammonium Phosphate ◽  
Polyurethane Dispersion

scholarly journals Chemical and Thermo-Mechanical Properties of Waterborne Polyurethane Dispersion Derived from Jatropha Oil

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 795
Author(s):  
Sariah Saalah ◽  
Luqman Chuah Abdullah ◽  
Min Min Aung ◽  
Mek Zah Salleh ◽  
Dayang Radiah Awang Biak ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Film Formation ◽  
Consumer Preference ◽  
Waterborne Polyurethane ◽  
Crosslinking Density ◽  
Jatropha Oil ◽  
Free Standing ◽  
Polyurethane Dispersion ◽  
Total Volatile Organic Compounds ◽  
Polyurethane Dispersions

Nowadays, there is a significant trend away from solvent-based polyurethane systems towards waterborne polyurethane dispersions due to government regulations requiring manufacturers to lower total volatile organic compounds, as well as consumer preference for more environmentally friendly products. In this work, a renewable vegetable oil-based polyol derived from jatropha oil was polymerized with isophorone diisocyanate and dimethylol propionic acid to produce anionic waterborne polyurethane dispersion. Free standing films with up to 62 wt.% bio-based content were successfully produced after evaporation of water from the jatropha oil-based waterborne polyurethane (JPU) dispersion, which indicated good film formation. The chemical and thermo-mechanical properties of the JPU films were characterized. By increasing the OH numbers of polyol from 161 mgKOH/g to 217 mgKOH/g, the crosslinking density of the JPU was significantly increased, which lead to a better storage modulus and improved hydrophobicity. Overall, JPU produced from polyol having OH number of 217 mgKOH/g appears to be a promising product for application as a binder for wood and decorative coatings.

Waterborne polyurethane nanocomposite reinforced with amine intercalated α-zirconium phosphate - Study of thermal and mechanical properties

Polymer ◽  
2020 ◽  
Vol 186 ◽  
pp. 122008 ◽  
Author(s):  
Manoj B. Kale ◽  
Nidhin Divakaran ◽  
Suhail Mubarak ◽  
Duraisami Dhamodharan ◽  
T. Senthil ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Zirconium Phosphate ◽  
Waterborne Polyurethane ◽  
Thermal And Mechanical Properties

scholarly journals Few-layer graphene aqueous suspensions for polyurethane composite coatings

MRS Advances ◽  
2016 ◽  
Vol 2 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Eunice Cunha ◽  
Fernando Duarte ◽  
M. Fernanda Proença ◽  
M. Conceição Paiva
Keyword(s):  
Mechanical Properties ◽  
Tensile Testing ◽  
Composite Coatings ◽  
Composite Films ◽  
Water Vapor Permeability ◽  
Waterborne Polyurethane ◽  
Vapor Permeability ◽  
Layer Graphene ◽  
Polyurethane Composite ◽  
Few Layer Graphene

ABSTRACTGraphite nanoplates (GnP) have recently attracted attention as an economically viable alternative for the development of functional and structural nanocomposites. The incorporation of GnP into waterborne polyurethane (WPU) with loadings from 0.1 to 10 wt.% was studied. The mechanical properties of the composite films were assessed by tensile testing showing an increase of the Young’s modulus up to 48%. The electrical conductivity increased by 9 orders of magnitude and the water vapor permeability of the composite films decreased 57% for composites containing 5.0 wt.% of GnP.

An Unparalleled H-bonding and Ion-bonding Crosslinked Waterborne Polyurethane with Super Toughness and Unprecedented Fracture Energy

2021 ◽  
Author(s):  
Yuan Yao ◽  
Bo Liu ◽  
Ziyang Xu ◽  
Jianhai Yang ◽  
Wenguang Liu
Keyword(s):  
Mechanical Properties ◽  
Fracture Energy ◽  
Waterborne Polyurethane ◽  
Self Healing ◽  
Polyurethane Elastomers

Self-healing polyurethane elastomers have been extensively studied; however, developing an eco-friendly self-healable waterborne polyurethane (WPU) with exceptional mechanical properties remains a great challenge. Herein, we report healable, and highly tough...

scholarly journals The Puncture and Water Resistance of Polyurethane- Impregnated Fabrics after UV Weathering

Polymers ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 15
Author(s):  
Antonella Patti ◽  
Domenico Acierno
Keyword(s):  
Experimental Data ◽  
Uv Radiation ◽  
Water Resistance ◽  
Uv Light ◽  
Crosslinking Agent ◽  
Waterborne Polyurethane ◽  
Impregnation Method ◽  
Polyurethane Dispersion ◽  
Spectroscopic Analyses ◽  
Before And After

Polyurethane is a polymer adaptable to different scientific and industrial requirements; nevertheless it is also extremely susceptible to UV radiation, which compromises the physical and mechanical functionality. In this framework, our study investigated the effect of waterborne polyurethane dispersion (WPUD) applied to a polyester (PET)-based fabric, through the impregnation method, on the puncturing and water resistance of the pristine material, before and after UV weathering. Results confirmed an increment of both features in the prepared fabrics, attributed to the PUR textile treatment; but a partially loss of the gained properties in the samples due to the UV weathering. In order to improve the efficiency of the impregnating dispersions, in protecting the durability of the treated materials, the addition of different UV light stabilizers, or/and of crosslinking agent into WPUD was also tested. From the experimental data, it can be concluded that formulations based on WPUD, containing both the crosslinker and UV organic absorber, have displayed an increment of their perforation and water resistance for the treated samples with respect to the starting textile, and contemporary have preserved the features against the UV light. Finally, microscopic and spectroscopic analyses have been performed as further characterization techniques of the samples surface.

Preparation and Property of Waterborne Polyurethane/Cellulose Nanofiber Nanocomposite Films

2020 ◽  
Vol 993 ◽  
pp. 631-637
Author(s):  
Yu Zhe Lin ◽  
Jia Min Zeng ◽  
Jing Hong Ma ◽  
Jing Hua Gong
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanofibers ◽  
Waterborne Polyurethane ◽  
Tensile Tests ◽  
Environmental Safety ◽  
Nanocomposite Films ◽  
Solution Blending ◽  
Low Weight ◽  
New Type ◽  
Dispersing Medium

Waterborne polyurethane (WPU) is a new type of polyurethane system, which using water instead of organic solvent as dispersing medium. Because of its non-toxicity and environmental safety, WPU is considered as the development direction of coatings and adhesives. However, the mechanical properties of WPU are worse than that of solvent-based polyurethane, therefore, the modification of WPU has received increasingly attention. Meanwhile numerous evidences demonstrate the excellent properties of cellulose nanofibers (CNFs) such as high aspect ratio, low weight and outstanding mechanical strength. Therefore, there is a high expectation for CNFs to be introduced into WPU as reinforcing filler. In this work, a series of CNFs/WPU nanocomposite films were prepared by solution blending. The structure, morphology, thermal behavior and mechanical properties were investigated. SEM results showed that CNFs were evenly dispersed in the WPU matrix. Tensile tests indicated that the modulus and tensile strength of CNFs/WPU nanocomposite films were improved compared with the neat film. While the break elongation of the nanocomposite films decreased with the increase of CNFs content. The synergistic interaction between CNFs and WPU matrix plays an important role in the enhancement of mechanical properties.

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