The transfer of p33(ING1b) protein from the nucleus to the cytoplasm may result in loss of normal cellular function of the protein, which might play a role in the tumourigenesis and metastasis of OSCCs.

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Nowadays, polyurethanes with multifunctional and multiple shape memory effects, especially those without the use of toxic phosgene and isocyanate, have attracted significant attention. In this work, to prepare a kind of nonisocyanate polyurethane (NIPU) with triple shape memory effect, we introduced the behenic acid (BA) with good crystallinity into the NIPUs network, which combines glass transition of the cross-linked network and crystallization-melting of behenic acid, endowing the NIPUs with two independent transition temperatures: the glass transition temperature (T g ) and crystallization melting temperature (T m ). Specifically, the NIPUs were synthesized by the addition reaction of bi-functional cyclic carbonate and semicrystalline curing agent. The bi-functional cyclic carbonate was prepared by thiol-ene click reaction, and the BA was grafted onto polyethyleneimine to prepare semi-crystalline curing agent. By adjusting the ratio of BA to PEI and curing temperature, the crystallinity of NIPU can be tuned in a wide range, so that the NIPUs has tunable and superior triple shape memory performance, and the shape recovery rate is almost 100%.

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