A catalyst-free and recycle-reinforcing elastomer vitrimer with exchangeable links

Wang, Jin-Yun; Chen, Shubin; Lin, Tengfei; Ke, Jinhuang; Chen, Tianxiang; Wu, Xiao; Lin, Cong

doi:10.1039/d0ra07728c

Cited by 22 publications

(24 citation statements)

References 47 publications

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“…According to Figure S8a–c, Supporting Information, and the data in Table S6, Supporting Information, such a recycling‐reinforcing phenomenon could be found in other compositions of ENR/PLA blends and was also reported in our previous work. [ 54 ] These results of EP χ samples could be explained by the fact that intensive interfacial interactions and interpenetration between ENR and PLA were formed during recycling, which further supported the proposed formation mechanism of fiber‐like phase structure in ENR/PLA blends. The mechanical properties of the control sample cEP70D were also investigated.…”

Section: Resultssupporting

confidence: 56%

Dynamic Interfacial Cross‐Linking Polymer Blends with Fiber‐Like Phase Structure by Recycling

Wang

Song

Zhuang

et al. 2021

Macro Materials & Eng

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The properties of polymer blends strongly depend on their microstructure. Thus, tuning the phase structure and improving the interfacial interaction of blends are relatively crucial. Inspired by the breaking and reformation of dynamic covalent bonds in vitrimers, these special bonds are introduced into the phase interface of polymer blends in this work. Through reactive blending of epoxidized natural rubber (ENR), polylactic acid (PLA) and additives, polymer blends with dynamic interfacial cross‐linking are fabricated. The prepared blends with intensive interfacial interactions display excellent recycling capacity. Strikingly, after etching the dissolvable substances with a solvent, the porous phase structure of original polymer blends changes to a fiber‐like phase structure of the third recycled blends, entirely distinct from most reported phase structures in polymer blends. In addition, the composites show great enhancements in mechanical properties during recycling. This work provides an effective method to tune the phase structure and improve the interfacial interaction of polymer blends.

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Section: Resultssupporting

confidence: 56%

Dynamic Interfacial Cross‐Linking Polymer Blends with Fiber‐Like Phase Structure by Recycling

Wang

Song

Zhuang

et al. 2021

Macro Materials & Eng

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“…While the first generation of vitrimers focused on high- T g thermoset-like materials, our group and others have become interested in the challenge of designing catalyst-free elastomeric vitrimers. − With high- T g materials, even if the small-molecule exchange reaction can occur at low temperatures, it will not proceed appreciably within the network until T g is exceeded . For low- T g materials, however, the associative exchange reaction must be carefully considered to enable reprocessing at reasonable temperatures but avoid creep under service conditions.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Structural Consequences of Associative Dynamic Cross-Linking in Acrylic Diblock Copolymers

et al. 2021

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The composition of low-T g n-butylacrylate-block-(acetoxyaceto)ethyl acrylate block polymers is investigated as a strategy to tune the properties of dynamically cross-linked vinylogous urethane vitrimers. As the proportion of the cross-linkable block is increased, the thermorheological properties, structure, and stress relaxation evolve in ways that cannot be explained by increasing cross-link density alone. Evidence is presented that network connectivity defects such as loops and dangling ends are increased by microphase separation. The thermomechanical and viscoelastic properties of block copolymer-derived vitrimers arise from the subtle interplay of microphase separation and network defects.File list (3) download file view on ChemRxiv Ishibashi MS revision.pdf (6.10 MiB) download file view on ChemRxiv Ishibashi SI revision.pdf (5.78 MiB)

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“…211 There is great potential for the use of biologically derived materials and waste products, for vitrimer and dynamic adhesives. Various natural products including vegetable oils, 210,213 rosin, 210 and natural rubber, 214 and can be utilised, in addition to those mentioned previously. 191 This provides an opportunity to step beyond the current commercial adhesives, such as epoxy resins, with their associated sustainability and environmental issues.…”

Section: Green Chemistry Accepted Manuscriptmentioning

confidence: 99%

Debondable adhesives and their use in recycling

et al. 2022

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A catalyst-free and recycle-reinforcing elastomer vitrimer with exchangeable links

Abstract: A catalyst-free elastomer vitrimer was prepared through reactive blending of commercial available XNBR and ENR with exceptional recycle-reinforcing property.

Cited by 22 publications

References 47 publications

Dynamic Interfacial Cross‐Linking Polymer Blends with Fiber‐Like Phase Structure by Recycling

Dynamic Interfacial Cross‐Linking Polymer Blends with Fiber‐Like Phase Structure by Recycling

Mechanical and Structural Consequences of Associative Dynamic Cross-Linking in Acrylic Diblock Copolymers

Debondable adhesives and their use in recycling

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