Effect of ionic content, solid content, degree of neutralization, and chain extension on aqueous polyurethane dispersions prepared by prepolymer method

2005 ◽  
Vol 98 (6) ◽  
pp. 2514-2520 ◽  
Author(s):  
Ajaya K. Nanda ◽  
Douglas A. Wicks ◽  
Samy A. Madbouly ◽  
Joshua U. Otaigbe
Keyword(s):  
Solid Content ◽  
Chain Extension ◽  
Ionic Content ◽  
Polyurethane Dispersions ◽  
Aqueous Polyurethane Dispersions

Rheological Behavior of Aqueous Polyurethane Dispersions:  Effects of Solid Content, Degree of Neutralization, Chain Extension, and Temperature

2005 ◽  
Vol 38 (9) ◽  
pp. 4014-4023 ◽  
Author(s):  
Samy A. Madbouly ◽  
Joshua U. Otaigbe ◽  
Ajaya K. Nanda ◽  
Douglas A. Wicks
Keyword(s):  
Rheological Behavior ◽  
Solid Content ◽  
Chain Extension ◽  
Polyurethane Dispersions ◽  
Aqueous Polyurethane Dispersions

scholarly journals Waterborne Polyurethane Dispersions and Thin Films: Biodegradation and Antimicrobial Behaviors

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 961
Author(s):  
Samy A. Madbouly
Keyword(s):  
Biomedical Applications ◽  
Antimicrobial Properties ◽  
Waterborne Polyurethane ◽  
Thermomechanical Properties ◽  
Solid Content ◽  
Review Article ◽  
Chain Extension ◽  
Structure Evolution ◽  
Solid Films ◽  
Polyurethane Dispersions

Biodegradable and antimicrobial waterborne polyurethane dispersions (PUDs) and their casted solid films have recently emerged as important alternatives to their solvent-based and non-biodegradable counterparts for various applications due to their versatility, health, and environmental friendliness. The nanoscale morphology of the PUDs, dispersion stability, and the thermomechanical properties of the solid films obtained from the solvent cast process are strongly dependent on several important parameters, such as the preparation method, polyols, diisocyanates, solid content, chain extension, and temperature. The biodegradability, biocompatibility, antimicrobial properties and biomedical applications can be tailored based on the nature of the polyols, polarity, as well as structure and concentration of the internal surfactants (anionic or cationic). This review article provides an important quantitative experimental basis and structure evolution for the development and synthesis of biodegradable waterborne PUDs and their solid films, with prescribed macromolecular properties and new functions, with the aim of understanding the relationships between polymer structure, properties, and performance. The review article will also summarize the important variables that control the thermomechanical properties and biodegradation kinetics, as well as antimicrobial and biocompatibility behaviors of aqueous PUDs and their films, for certain industrial and biomedical applications.

Research on the post-chain extension of aqueous polyurethane dispersions

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36510-36515 ◽  
Author(s):  
Xiaomeng Peng ◽  
Wusheng Wang ◽  
Naiyu Ma ◽  
Wenhe Guo ◽  
Xuekang Yu ◽  
...  
Keyword(s):  
Particle Size ◽  
Reaction Mechanism ◽  
Small Particle ◽  
Chain Extender ◽  
Chain Extension ◽  
Cage Effect ◽  
Small Particle Size ◽  
Chain Reaction ◽  
Polyurethane Dispersions ◽  
Aqueous Polyurethane Dispersions

The post-chain extension efficiency of APUDs were influenced by the particle size and the “cage effect” whatever the water or polyamine as the chain extender. The post-chain reaction mechanism: (a) small particle size; (b) big particle size.

Study on Polyurethane Dispersions with PES/PPG and High-Solid Content

2013 ◽  
Vol 864-867 ◽  
pp. 588-591 ◽  
Author(s):  
Xiao Li Wei ◽  
Fa Xing Zhang
Keyword(s):  
Particle Size ◽  
Shape Memory ◽  
Solid Content ◽  
Plastic Behavior ◽  
Mass Ratio ◽  
High Solid Content ◽  
High Solid ◽  
Shape Memory Behavior ◽  
Good Shape ◽  
Polyurethane Dispersions

A series of novel stable and high-solid-content polyurethane were prepared by self-emulsification,use PES and PPG as mixed soft segments.Influence of APAETMS content and mole ratio of PES/PPG on properties of polyurethane dispersions and films were analyzed .Results show that: the cross-linked complex were multivariate distribution in particle size. With an increase of the mass ratio of PES and PPG and content of APAETMS average particles diameter of polyurethane dispersions became bigger , poly-dispersion became wider., solid content of dispersions decrease.. It is also noticed that the high-solid-content dispersions exhibit a pseudo-plastic behavior, when the mass ratio of PES and PPG is 1:3 and content of APAETMS is 1%, the solid content of dispersions is up to 55%. The film also has a good shape memory behavior.

Aqueous polyurethane dispersions derived from polycarbonatediols and Di(4-isocyanatocyclohexyl)methane

2006 ◽  
Vol 46 (5) ◽  
pp. 588-593 ◽  
Author(s):  
Da-Kong Lee ◽  
Hong-Bing Tsai ◽  
Ruey-Shi Tsai
Keyword(s):  
Polyurethane Dispersions ◽  
Aqueous Polyurethane Dispersions

The properties of aqueous polyurethane dispersions and the formation of surface coatings based on them

1973 ◽  
Vol 15 (1) ◽  
pp. 221-228
Author(s):  
L.A. Sukhareva ◽  
M.R. Kiselev ◽  
P.I. Zubov ◽  
Ye.V. Safronova ◽  
B.L. Khavkina ◽  
...  
Keyword(s):  
Surface Coatings ◽  
Polyurethane Dispersions ◽  
Aqueous Polyurethane Dispersions
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