期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 7, 页码 8740-8750出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b21411
关键词
polymer blend; bond exchange reaction; copolymerization; TPU; fatty acid vitrimer (FV)
资金
- Natural Science and Engineering Research Council of Canada
- National Natural Science Foundation of China [11732012]
- China Scholarship Council [201806280391]
In recent decades, flexible, reconfigurable, and fast-response self-healing polymers have attracted considerable attention for both industrial field and scientific research. Mechanical blending remains the most mature, economical, effective, and the simplest approach to produce polymer blends, which can combine several distinctive advantages from different thermoplastic materials. However, such a process cannot be simply applied to thermosetting materials due to their permanent molecular structures. The synthesis of high-performance polymer blends connected by covalent cross-links remains a big challenge for the present industrial system. In this paper, we proposed a novel approach to synthesize polymer blends via blending thermosetting vitrimer containing dynamic covalent networks with thermoplastic polymers. It is demonstrated that the intrinsic relationship could be established by controlling the bond exchange reactions between the thermoset and the thermoplastic, thus triggering copolymerization. Due to the highly controlled processing conditions, the synthesized polymer is highly flexible, recyclable, and reprocessable, and possesses self-healing behavior at the same time. In addition, it shows potential applications in adhesive film and wearable electronics. This new technology opens a new way to reprocess thermoset in a fashion similar to thermoplastic in the current polymer industry.
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