"Polyurea usually contain ester and other hydrolysable bonds, such as anhydride, acetal, ketal, or imine, in their backbone structures," said Hanze Ying, a graduate student in Cheng's research group and first author of the paper published in the Journal of American Chemical Society. "In this study, we demonstrated the potential of PHUs for the design of water degradable polymeric materials that can be easily synthesized by mixing multifunctional bulky amines and isocyanates, expanding the family of hydrolysable polymers."
"Hydrolysable polymers have also been applied in the design of controlled release systems in agriculture and food industries and used as degradable, environmentally friendly plastics and packaging materials," Cheng said. "These applications usually require short functioning time, complete degradation and clearance of materials after their use."
According to the researchers, the new PHUs potentially have great advantages over many other hydrolyzable polymers. PHUs can be made with inexpensive chemical precursors in ambient conditions via simple and clean chemistry with no catalyst or by-products, making it possible for end-users to control the copolymer recipe for specific use without the need of complicated synthesis apparatus.
Explore further: Off-the-shelf materials lead to self-healing polymers (w/ video)
More information: Journal of American Chemical Society, pubs.acs.org/doi/abs/10.1021/ja5093437· 以上资料由
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