Design of well-defined shape memory networks with high homogeneity: towards advanced shape memory polymeric materials
Literature Information
Yi Pan, Zhaohui Zheng, Xiaobin Ding
Designing precisely defined network architecture that could integrate desired material properties into a single network is a great challenge for the development of advanced polymeric materials. For thermally induced shape memory polymers, rapid response, controllable recovery in a narrow temperature window and a large achievable number of cycles are critical for their applications. Here, we report the synthesis of a well-defined shape memory network with high homogeneity via efficient step-growth thiol-norbornene photopolymerization. Because of the uniform distribution of the switch segments and netpoints, the single polymer network exhibits a combination of perfect shape fixity and recovery, rapid response, outstanding cycle life at the high strain and unusual tunable multiple shape memory effects in a narrow temperature range, which may lead to an even more diverse range of applications.
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![[(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-Diacetyloxy-15-[(2R,3S)-3-benzamido-3-phenyl-2-(2,2,2-trichloroethoxycarbonyloxy)propanoyl]oxy-1,9-dihydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate structure [(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-Diacetyloxy-15-[(2R,3S)-3-benzamido-3-phenyl-2-(2,2,2-trichloroethoxycarbonyloxy)propanoyl]oxy-1,9-dihydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate structure](https://static.chemtradehub.com/structs/100/100431-55-8-7104.webp)


