MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
Macromol Rapid Commun. 2018 Dec;39(23):e1800395. doi: 10.1002/marc.201800395. Epub 2018 Aug 17.
3-Ethylidene-6-vinyltetrahydro-2H-pyran-2-one, a divinyl δ-lactone derived from CO and 1,3-butadiene, is used for the synthesis of networks with various compositions through the thiol-ene click reaction with di- and tri-thiol compounds. Thermal, mechanical, and optical properties of the networks are characterized. The networks have sharp and uniform glass transitions and show good thermal stability with T from 287 to 332 °C. Mechanical properties of the networks can be adjusted by the cross-link density; 6.18 MPa of tensile strength, 574% break elongation and 1.84 of tan δ at maximum are reached. Metal complexation makes the networks tougher due to additional cross-links. The highly homogeneous networks are transparent with average 90% transmittance of visible light, and of decent refractive indices around 1.55. Swelling-induced twist shape transformation and visible QR code under UV light is realized by pattern of the network.
3-亚乙基-6-乙烯基四氢-2H-吡喃-2-酮，一种由 CO 和 1,3-丁二烯衍生而来的二乙烯基 δ-内酰胺，可通过与二硫醇和三硫醇化合物的硫醇-烯点击反应，用于合成具有各种组成的网络。对网络的热、机械和光学性能进行了表征。该网络具有尖锐且均匀的玻璃化转变温度，表现出良好的热稳定性，T 从 287 到 332°C。通过交联密度可以调节网络的力学性能；拉伸强度达到 6.18 MPa，断裂伸长率为 574%，最大 tan δ 为 1.84。金属络合由于额外的交联使得网络更加坚韧。高度均匀的网络具有透明性，可见光平均透过率为 90%，折射率约为 1.55。通过网络的图案实现了由溶胀诱导的扭转型形状转变和紫外光下可见的 QR 码。
