scholarly journals Synthesis of self-healing waterborne polyurethanes containing sulphonate groups

RSC Advances ◽  
2017 ◽  
Vol 7 (33) ◽  
pp. 20093-20100 ◽  
Author(s):  
Ye Xiao ◽  
Huihua Huang ◽  
Xiaohong Peng
Keyword(s):  
Phase Separation ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Self Healing ◽  
Ionic Interaction ◽  
Aliphatic Diamine ◽  
Waterborne Polyurethanes

An self-healing waterborne polyurethane is synthesized using the aliphatic diamine sulphonate as a hydrophilic chain-extender. The ionic interaction between the sulphonate groups and the micro-phase separation morphology realize self-healing.

Preparation and Application of Undecylenate Based Diol for Bio-Based Waterborne Polyurethane Dispersion

2014 ◽  
Vol 955-959 ◽  
pp. 88-91 ◽  
Author(s):  
Zhe Yang ◽  
Yan Bin Zhu ◽  
Fang Peng ◽  
Chang Qing Fu
Keyword(s):  
Castor Oil ◽  
Room Temperature ◽  
Click Reaction ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Proton Nuclear Magnetic Resonance ◽  
Isophorone Diisocyanate ◽  
Polyurethane Dispersion ◽  
Waterborne Polyurethanes ◽  
Ft Ir

The undecylenate based diol (UAD) has been synthesized from undecylenate by esterification and thiol-ene click reaction sequently, and then it was used as a diol to prepare bio-based waterborne polyurethane (WPU) reacting with isophorone diisocyanate (IPDI) and castor oil-based carboxyl hydrophilic chain extender. The structure of undecylenate based diol was verified by hydrogen proton nuclear magnetic resonance (1H NMR). Fourier transform infrared spectroscopy (FT-IR) was used to characterize the structure of WPU film. Furthermore, particle size and viscosity were used to character apparent properties of the bio-based waterborne polyurethane dispersion. The result shows that: bio-based waterborne polyurethane dispersion is transparent and very stable under room temperature. This work provides a simple and efficient method for the preparation of fatty acids based polyols and bio-based waterborne polyurethanes.

scholarly journals Synthesis and Characterization of Healable Waterborne Polyurethanes with Cystamine Chain Extenders

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1492 ◽  
Author(s):  
Dae-Il Lee ◽  
Seung-Hyun Kim ◽  
Dai-Soo Lee
Keyword(s):  
Scratch Test ◽  
Chain Extender ◽  
Self Healing ◽  
Hot Press ◽  
High Mechanical Strength ◽  
Waterborne Polyurethanes ◽  
Before And After ◽  
Chain Extenders ◽  
A Chain

In this study, environmentally friendly, self-healing waterborne polyurethanes (WPUs) were prepared based on the disulfide metathesis reaction in cystamine. The cystamine acted as a chain extender in the WPU film, which showed a high mechanical strength of 19.1 MPa. The possibility of self-healing reaction was simultaneously modeled via liquid chromatography–mass spectrometry (LC-MS). WPU was confirmed to self-heal a surface crack thermally after a scratch test, and the efficiency was measured by comparing the mechanical properties before and after a cut-and-healing test. In addition, the disulfide-thiol exchange reaction was confirmed to occur in WPU with cystamine as a chain extender and 2-mercaptoethanol. Hot press tests confirmed the possibility of reprocessing the WPU. The WPU incorporating disulfide groups showed great potential as a smart self-healing material.

Effect of chain extender on microphase structure and performance of self‐healing polyurethane and poly(urethane‐urea)

2021 ◽  
pp. 51371
Author(s):  
Yulong Wang ◽  
Yaqiong Li ◽  
Maoyong He ◽  
Jingjing Bai ◽  
Bingxiao Liu ◽  
...  
Keyword(s):  
Chain Extender ◽  
Self Healing ◽  
And Performance

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 Synthesis and Properties of Waterborne Polyurethane (WBPU)/Modified Lignin Amine (MLA) Adhesive: A Promising Adhesive Material

2016 ◽  
Author(s):  
Mohammad Mizanur Rahman ◽  
Md. Hasan Zahir ◽  
Han Do Kim
Keyword(s):  
Adhesive Strength ◽  
Weather Conditions ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Mixing Process ◽  
Adhesive Material ◽  
Lignin Amine ◽  
A Chain ◽  
Modified Lignin ◽  
Adhesive Materials

A series of waterborne polyurethane (WBPU)/modified lignin amine (MLA) adhesives was prepared using modified lignin amine (MLA) as a chain extender by a prepolymer mixing process. A successful Mannich reaction was achieved during the synthesis of MLA by reacting lignin with bis(3-aminopropyl)amine. Higher tensile strength, Young’s modulus and thermal stability were recorded for WBPU/MLA adhesives with higher MLA contents. The WBPU/MLA adhesive materials were used to coat PVC substrates. The adhesive strength increased with increasing MLA content. More importantly, the MLA also enhanced the WBPU/MLA coating in terms of adhesive strength at moderately high temperatures as well as under natural weather exposed conditions. The adhesive strength was essentially unaffected with 6.48 mole% MLA in the WBPU/MLA coating after exposure to natural weather conditions for 180 days.

Thermal and Mechanical Activation of Dynamically Stable Ionic Interaction toward Self-Healing Strengthening Elastomers

2021 ◽  
Author(s):  
Yan Peng ◽  
Yujia Hou ◽  
Qi Wu ◽  
Qichao Ran ◽  
Guangsu Huang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Activation ◽  
Biological Tissues ◽  
Self Healing ◽  
Ionic Interaction

Biological tissues can grow stronger after damage and self-healing. However, artificial self-healing materials usually show decreased mechanical properties after repairing. Here, we develop a self-healing strengthening elastomers (SSEs) by engineering...

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