功能高分子材料的设计与合成
讲座名称：
功能高分子材料的设计与合成
讲座时间：
2015-10-26
讲座人：
应罕泽
形式：
校区：
兴庆校区
实践学分：
讲座内容：
报告题目：功能高分子材料的设计与合成
报告时间：10月26日上午10:00-12:00
报告地点：化学楼207室
报告人：国伊利诺伊州大学厄巴纳香槟分校应罕泽博士
报告内容简介：
Dynamic covalent bonds (DCBs) featuring reversible bonding/debonding properties have found various applications indynamic materials designs such as self-healing, malleable, shape-memory or environmentally-adaptive materials. However,most DCBs developed so far require either catalyst or harsh environments to facilitate bond reversion and involve special building blocks for synthesis. Here we seek to develop a novel platform for dynamic materials design using a new type of DCB – hindered urea bond (HUB). Differing from normal urea bond, HUB bears bulky substituents on one of the nitrogen atom, which distorts the atomic co-planarity, weakens the bonding stability, and allows reversible dissociation of HUB to isocyanate and hindered amine. The dynamic properties of HUB enables the design of self-healing polymeric elastomers through bond exchange and hydrolyzable polymers through quenching of dissociative intermediate – isocyanate.HUB shows many advantages in dynamic materials designs compared with other DCB systems in terms of simplicity, dynamicity, tunability and cost.
近期代表性论文：
1. Ying H.; Zhang Y.; Cheng J.* “Dynamic urea bond for the design of reversible and self-healing polymers”, Nat. Commun., 2014, 5, 3218.
2.Ying H.; Cheng, J.* “Hydrolysable Polyureas Bearing Hindered Urea Bonds”, J. Am. Chem. Soc., 2014, 136, 16974.
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