期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 23, 页码 27471-27480出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c05813
关键词
dynamic covalent chemistry; pressure sensitive adhesive; hot melt adhesive; phase separation; rheology; thia-Michael bonds
资金
- Division of Materials Research of the NSF [1609076]
- NIST [60NANB15D077]
- Center for Hierarchical Materials Design (CHiMaD)
- University of Chicago Materials Research Science and Engineering Center (MRSEC) [DMR-2011854]
- Pritzker School of Molecular Engineering
- MRSEC Characterization Facility at the University of Chicago [DMR-2011854]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1609076] Funding Source: National Science Foundation
A series of multistage adhesives utilizing dynamic thia-Michael bonding motifs are reported, with the key feature being dynamic reaction-induced phase separation that strengthens otherwise weakly bonded materials. By manipulating the phase separation characteristics with different pairs of benzalcyanoacetate cross-linking units, tailored adhesive response can be achieved.
A series of multistage (pressure-sensitive/hot melt) adhesives utilizing dynamic thia-Michael bonding motifs are reported. The benzalcyanoacetate Michael acceptors used in this work undergo bond exchange under ambient conditions without external catalysis, facilitating pressure-sensitive adhesion. A key feature of this system is the dynamic reaction-induced phase separation that lends reinforcement to the otherwise weakly bonded materials, enabling weak, repeatable pressure-sensitive adhesion under ambient conditions and strong adhesion when processed as a hot melt adhesive. By using different pairs of benzalcyanoacetate cross-linking units, the phase separation characteristics of the adhesives can be directly manipulated, allowing for a tailored adhesive response.
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