《Table 3 The quantitative shape memory effect of the PEUR-SSx-Ns》

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《基于二硫键的聚氨酯网络:从可调多重形状记忆性能到同步修复（英文）》

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a) Rf%and Rr%during the two steps in triple-shape memory effect are list in sequence of proceeding；b) Rf%and Rr%during the three steps in quadruple-shape memory effect are listed in sequence of proceeding.

On the basis of the previous analyses of self-healing，it can be seen that healing efficiency was raised with the increase of disulfide bond content，but gradually decreased with the increase of cross-linking degree.Herein，we try to develop a material with both excellent shape memory and self-healing property，so we discuss shapememory effect from low cross-linking to high crosslinking.The quantifications of dual-shape memory effect for PEUR-SS12%-Ns with different cross-linking were calculated with Equation（S1）and（S2），and the results are summarized in Table 3.Apparently，all three networks have excellent shape fixing property with Rfaround99.3%–99.9%.However，the recovery property is found highly dependent on the cross-linking density，i.e.，the Rr is gradually increasing from 87%to 97.4%.PEUR-SS12%-N5possesses the best dual-shape memory effect since it has the strongest netpoint.Contrarily，PEUR-SS12%-N3shows unsatisfied dual-shape memory effect（Fig.S6），so it has not been addressed in the followed discussion.