Thermoplastic elastomers exhibit high softness, stretchability, recoverability, and reprocessibility, but their manufacture requires high cost and long processing time. Photocuring 3D printing is a remedial processing method as it enables rapid fabrication at room temperature. However, it is difficult to print thermoplastic elastomers by photocuring 3D printing because the generated linear polymers easily dissolve in liquid precursors during printing. Herein, stretchable, self-healing, and renewable palm oil (PO)-based elastomers were prepared from UV-responsive vinyl PO monomers via photocuring 3D printing. Fast solid-liquid separation was achieved via hydrogen bonds and Zn²⁺-ligand coordination (non-covalent crosslinking) to slow down the dissolution of crosslinked polymers in the monomer liquid. The non-covalent bonds endowed the elastomers with high tensile strength (~4.2 MPa) and elongation at break (~851%). Additionally, the elastomers are mainly prepared from biobased, renewable, and low-cost PO feedstocks. Most importantly, the dual dynamic crosslinked network resulted in superior stress relaxation, shape programming, and self-healing behavior of the elastomers. The method described may enhance the application scope of thermoplastic elastomers and 3D printing.

热塑性弹性体具有高柔软性、拉伸性、可恢复性和可再加工性，但它们的制造成本高，加工时间长。光固化 3D 打印是一种补救处理方法，因为它可以在室温下快速制造。然而，很难通过光固化 3D 打印来打印热塑性弹性体，因为生成的线性聚合物在打印过程中很容易溶解在液体前体中。在此，通过光固化 3D 打印从紫外线响应乙烯基 PO 单体制备了可拉伸、自修复和可再生的棕榈油 (PO) 基弹性体。通过氢键和Zn ²⁺实现快速固液分离-配体配位（非共价交联）以减缓交联聚合物在单体液体中的溶解。非共价键赋予弹性体高拉伸强度 (~4.2 MPa) 和断裂伸长率 (~851%)。此外，弹性体主要由生物基、可再生和低成本的 PO 原料制备。最重要的是，双动态交联网络导致弹性体具有优异的应力松弛、形状规划和自修复行为。所描述的方法可以扩大热塑性弹性体和 3D 打印的应用范围。