Bioinspired Engineering of Two Different Types of Sacrificial Bonds into Chemically Cross-Linked <i>cis</i>-1,4-Polyisoprene toward a High-Performance Elastomer

Liu, Jie; Wang, Sheng; Tang, Zhenghai; Huang, Jing; Guo, Baochun; Huang, Guangsu

doi:10.1021/acs.macromol.6b01576

Cited by 144 publications

(100 citation statements)

References 60 publications

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“…On the contrary, the self‐healing materials prepared by the noncovalent interactions possess the higher self‐healing efficiency but suffer from low mechanical properties. Many efficient methods were put forward by researchers to balance the two key performance parameters, including of double‐network materials, the nanoparticles enhanced polymer networks, phase separation . Among the methods, the noncovalent bonds and covalent bonds built the dual crosslinked network polymer is a very significance strategy.…”

Section: Introductionmentioning

confidence: 99%

Coordination Bonds and Diels–Alder Bonds Dual Crosslinked Polymer Networks of Self‐healing Polyurethane

Lin

Sheng

Liu

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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A dual crosslinked self‐healing polyurethane was prepared with robust mechanical properties through the dynamic reversible pyridine‐Fe3+ coordination bonds and Diels–Alder (DA) covalent bonds dual crosslinking strategy. Moreover, the mechanical properties and self‐healing ability of polyurethane can be tuned readily by different ratio of the coordination bonds and DA bonds. Under external load, the coordination bonds serve as sacrificial bonds are broken to dissipate energy, the DA bonds can keep the shape of sample. With the coordination bonds participation, the damaged samples can be healed under moderate heating treatment or with the aid of FeCl3 solution. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2228–2234

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Section: Introductionmentioning

confidence: 99%

Coordination Bonds and Diels–Alder Bonds Dual Crosslinked Polymer Networks of Self‐healing Polyurethane

Lin

Sheng

Liu

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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“…The formation of hydrogen bonds in the lignin/EPDM composites was confirmed by FTIR analysis, as shown in Figure . In E100P20L40, the characteristic peak for the stretching vibration of CO group in POE‐MA was found at 1712 cm −1 , the characteristic peak at 1660 cm −1 of carboxylic acid group and the peaks at 1598 cm −1 and 1511 cm −1 assigning to the NCH groups were introduced by the enzymatic hydrolysis lignin . In comparison, after reacting with ATA, a new absorption peak for the stretching vibration of CNC at 1549 cm −1 was observed in E100P20L40A5, the peak at 1712 cm −1 assigning to the CO group in POE‐MA disappeared and a new peak emerged at 1691 cm −1 , which was assigned to the carboxylic acid groups resulting from the reaction of POE‐MA and ATA (Scheme A).…”

Section: Resultsmentioning

confidence: 99%

“…Liu et al. incorporated hydrogen bonds and Zn‐based coordination bonds into a chemically cross‐linked cis ‐1,4‐polyisoprene network; the strength and toughness of the rubber was significantly improved …”

Section: Introductionmentioning

confidence: 98%

Lignin‐Reinforced Ethylene‐Propylene‐Diene Copolymer Elastomer via Hydrogen Bonding Interactions

Mei

Liu

Huang

et al. 2019

Macro Materials & Eng

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It is still a great challenge to prepare lignin/polyolefin composites with good strength and toughness. Inspired by the energy sacrificial mechanism from biomaterials, dynamic hydrogen bonds (H-bonds) are incorporated into the lignin/ethylene-propylene-diene monomer (EPDM) composite system to improve the interfacial interactions between lignin and EPDM. Such H-bonding interactions are demonstrated to be able to simultaneously improve the modulus, strength, and toughness of lignin/EPDM composites without sacrificing the extensibility. This work provides a facile method for the high-valued utilization of lignin in the preparation of high-performance elastomer composites using bio-renewable resources as reinforcing agent.

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“…In recent years, enhancement of fracture toughness has been a challenging topic in the research field of elastomers and gels . The fracture of these materials occurs mainly because of the localized stress concentration in the molecular network under deformation .…”

Section: Summary Of Mechanical Propertiesmentioning

confidence: 99%

Preparation of All Polyester‐Based Semi‐IPN Elastomers Containing Self‐Associative or Non‐Associative Guest Chains via Post‐Blending Cross‐Linking

Hayashi

Sugimoto

Takasu

2019

Macro Materials & Eng

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and gels. [7][8][9][10][11] The fracture of these materials occurs mainly because of the localized stress concentration in the molecular network under deformation. [12,13] Therefore, suppression of the stress concentration should be required to achieve high-toughness materials, which can be enabled simply by incorporation of a stress-dissipation device in the network structure. For the most-known example, Gong's group has developed the double network gel (DN gels) composed of two kinds of network with different strength, [14][15][16][17][18][19] where these two kinds of cross-linked networks are interpenetrating with each other. Thus DN gels are a special class, but can be categorized and called as the interpenetrating polymer network (IPN [20][21][22][23][24] ). In their first report, [25] the first network is kept flexible and highly stretchable while the second network is designed to be brittle against deformation. Under deformation, the brittle network is therefore broken primary to the fracture of the flexible network. The fracture of the brittle network can work sacrificially to suppress stress-localization in the network, providing high mechanical toughness to the material. Similarly, there is also another category of interpenetrating poly mer network, called semi-interpenetrating polymer network (semi-IPN). In semi-IPN materials, the guest polymers that do not form permanent cross-links interpenetrate with the main network. [26][27][28][29][30] For such materials, various physical properties, including the thermal properties and mechanical toughness, are modified or enhanced by adding guest polymers that have different thermal or flow properties.Conventionally, IPN or semi-IPN materials are prepared by polymerization of second monomers in the presence of a first cross-linked network, where the cross-linkable monomers (such as divinyl monomers) are also added in case for preparation of IPN materials. Therefore, in such preparation methods, the molecular characteristics of component polymers and networks (e.g., the molecular weight, the fraction of second network or guest polymers) are difficult to be quantified due to the insoluble nature of cross-linked systems. This limits the precise investigation of correlation between molecular characteristics and physical properties. In addition, for both IPN and semi-IPN materials, the compatibility between the component Semi-Interpenetrating Polymer Networks Mechanical properties of semi-interpenetrating polymer network (semi-IPN) elastomers consisting of chemical networks and self-associative/nonassociative guest chains are demonstrated. Amorphous low T g polyesters with thiol side groups (PE-SH) are first synthesized by melt polycondensation. PE-SH are then converted to polyesters containing COOH side groups (PE-COOH) and amide side groups (PE-amide) through Michael addition reaction of thiol groups with acrylic acid and acrylamide, respectively. Homogeneous semi-IPN elastomers are obtained by thermal cross-linking for bulk mixtures of PE-COOH and PE-amide in the...

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Bioinspired Engineering of Two Different Types of Sacrificial Bonds into Chemically Cross-Linked cis-1,4-Polyisoprene toward a High-Performance Elastomer

Cited by 144 publications

References 60 publications

Coordination Bonds and Diels–Alder Bonds Dual Crosslinked Polymer Networks of Self‐healing Polyurethane

Coordination Bonds and Diels–Alder Bonds Dual Crosslinked Polymer Networks of Self‐healing Polyurethane

Lignin‐Reinforced Ethylene‐Propylene‐Diene Copolymer Elastomer via Hydrogen Bonding Interactions

Preparation of All Polyester‐Based Semi‐IPN Elastomers Containing Self‐Associative or Non‐Associative Guest Chains via Post‐Blending Cross‐Linking

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