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20. Feb 2017 | Coatings Technologies

Potential of a novel waterborne polyurethane as biomaterial

A new synthesis process, named "in situ water reaction process”, was developed to obtain polyurethane dispersions.

Thermal and crystalline properties of waterborne polyurethane by in situ water reaction process and the potential application as biomaterial. Source: pixabay.com/CCO

Understanding the role of water in waterborne polyurethane synthesis and properties is a central issue. Water may bring some unique and interesting properties and phenomenon for waterborne polyurethane.

Special morphology with nanodots

The novel poly(neopentyl glycol adipate) (PNA)-based waterborne polyurethane was prepared using the designed in situ water reaction process. The film has a special morphology with nanodots. As comparison, waterborne polyurethane was synthesised through the conventional water addition process through prepolymer method. The thermal and crystalline properties of the obtained polyurethanes were detected by XRD, DSC, DMA, POM, TG and SEM.

Safer and more environmentally friendly

The results indicated that the novel polyurethane dispersion presents unique performance. It has lower crystallinity, better thermal resistance and lower mold resistance. Furthermore, to explore the application area of the novel polyurethane dispersion, mold resistance experiments were performed. The result suggested that polyurethane dispersion from the novel process is safer and more environmentally friendly than that from conventional water addition process.

The study is published in: Progress in Organic Coatings, Volume 104, March 2017, Pages 1–10

EC Library Polyurethanes

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Polyurethanes

The chemistry of polyurethane coatings is of great significance in many applications worldwide. Moreover, their development potential has yet to be exhausted by any means. New applications are being identified and the product range will be further development. The book provides a comprehensive overview of the chemistry and the various possible application fields of polyurethanes. It starts by illustrating the principles of polyurethane chemistry, enabling the reader to understand the current significance of many applications and special developments. Newcomers learn about the key concepts of polyurethane chemistry and the main application technologies, while experienced specialists will value the insights on current trends and changes.

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