Bio-massed epoxy vitrimers are significant for sustainable industrial development, however, most of them show low mechanical properties and thermostability. The rosin derivates with rigid hydrophenanthrene framework have been synthesized as epoxy monomer and curing agent, for preparation of fully rosin-based epoxy vitrimer networks with dynamic ?-hydroxy ester bonds. Meanwhile, to further improve mechanical properties and thermostability of the networks, zinc acetylacetonate was coordinated with the network by interaction of zinc metal with carbonyl group in the networks. The obtained fully rosin-based epoxy vitrimers have been characterized by FTIR, SEM, and DMA measurements. The obtained networks possess the higher mechanical properties (tensile strength?=?40.8?MPa, toughness?=?10.77?MJ/m3) and thermostability (T5d = ?270??C) than these of vegetable oil-based epoxy vitrimers. Moreover, the performances of thermo-healing, welding, shape memory, physical and chemical recycling have been investigated. Present results demonstrate obtained epoxy vitrimers with good functionalities. In addition, fully rosin-based epoxy vitrimers display an excellent degradability under ethylene glycol solvent and can be applied as environmentally friendly materials.

» Author: Yanning Zeng, Bin Yang, Zhaoyi Luo, Xianjie Pan, Zhao Ning

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