Design of Rubber Composites with Autonomous Self-Healing Capability

Utrera‐Barrios, Saul; Santana, Marianella Hernández; Verdejo, Raquel; López–Manchado, Miguel A.

doi:10.1021/acsomega.9b03516

Cited by 75 publications

(55 citation statements)

References 56 publications

(92 reference statements)

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“…The reorientation of dipoles occurs through the cooperative motion of the polymer chains (α-relaxation) or via secondary relaxations (β-relaxation), associated with local motions. 40 − 45 Here, the α-relaxation, correlated with the dynamic glass transition, can be observed at 295 K due to the segmental motion of SSBR chains. To remove any geometric effects in the samples, the BDS data were normalized with respect to the secondary relaxation process.…”

Section: Resultsmentioning

confidence: 98%

Role of Interface Structure and Chain Dynamics on the Diverging Glass Transition Behavior of SSBR-SiO₂-PIL Elastomers

Sattar

Patnaik

2020

ACS Omega

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Intermolecular interactions between the constituents of a polymer nanocomposite at the polymer–particle interface strongly affect the segmental mobility of polymer chains, correlated with their glass transition behavior, and are responsible for the improved dynamical viscoelastic properties. In this work, we emphasized on the evolution of characteristic interfaces and their dynamics in silica (SiO 2 NP)-reinforced, solution-polymerized, styrene butadiene rubber (SSBR) composites, whose relative prevalence varied with the phosphonium ionic liquid (PIL) volume fraction, used as an interfacial modifier. The molecular origins of such interfaces were examined through systematic dielectric spectroscopy, molecular dynamics (MD) simulations, and dynamic-mechanical analyses. The PIL facilitated H-bonding, cation−π, surface–phenyl, and van der Waals interfacial interactions between SSBR and SiO 2 NP, thereby regulating the polymer chain dynamics, orientation, and mean-square displacement. Specifically, the mass density profiles from MD simulations revealed the dynamic gradient of polymer chains in the interfacial region as a function of radial distance from the center of mass of the SiO 2 NP surface. The results showed a structuring effect to result in well-resolved density peaks at specific radial distances with the tangential orientation of styrene monomers in the vicinity of the SiO 2 NP surface. These domino effects highlighted strong interfacial interactions to have an indispensable effect on the viscoelastic performance and thermal motion of SSBR molecular chains, leading to a higher glass transition temperature ( T g ) by ∼15 K, validating the experimental data. More importantly, our results gave new insights into the fundamental understanding of the fact that the strength of intermolecular interactions induced by PIL at the polymer–particle interface is the key to control the α-relaxation dynamics and T g optimization, desired for specific applications.

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Section: Resultsmentioning

confidence: 98%

Role of Interface Structure and Chain Dynamics on the Diverging Glass Transition Behavior of SSBR-SiO₂-PIL Elastomers

Sattar

Patnaik

2020

ACS Omega

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“…Most of all, there are many studies that apply the Diels-Alder reaction to acrylate polymer, which is widely 2 of 14 used in coating materials [22][23][24][25][26][27][28][29]. In particular, the application of graphene or modified graphene oxide to self-healing polymers not only improves their mechanical properties, but also their healing efficiency [30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Mechanical and Self-Healing Properties for Polymethacrylate Derivatives Containing Maleimide Modified Graphene Oxide

Lee

Cha

2020

Polymers

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In this paper, a self-healable nanocomposite based on the Diels-Alder reaction is developed. A graphene-based nanofiller is introduced to improve the self-healing efficiency, as well as the mechanical properties of the nanocomposite. Graphene oxide (GO) is modified with maleimide functional groups, and the maleimide-modified GO (mGO) enhanced the compatibility of the polymer matrix and nanofiller. The tensile strength of the nanocomposite containing 0.030 wt% mGO is improved by 172%, compared to that of a polymer film incorporating both furan-functionalized polymer and bismaleimide without any nanofiller. Moreover, maleimide groups of the surface on mGO participate in the Diels-Alder reaction, which improves the self-healing efficiency. The mechanical and self-healing properties are significantly improved by using a small amount of mGO.

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“…An average of three specimens was reported in each case of the tensile experiment. The obtained stress–strain cure data before and after the healing was used to calculate healing efficiency [ 39 ] using Equation ()

\begin{matrix} left \\ Healing efficiency (%) = \\ \frac{Tensile strength of healed sample}{Tensile strength of original sample} \times 100 \end{matrix}

…”

Section: Characterizations and Measurementsmentioning

confidence: 99%

Dual‐Responsive Self‐Healable Carboxylated Acrylonitrile Butadiene Rubber Based on Dynamic Diels–Alder “Click Chemistry” and Disulfide Metathesis Reaction

Sarkar

Banerjee

Singha

2021

Macro Materials & Eng

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Introduction of the self‐healing property in the commercially available elastomers promotes the development of high‐end elastomeric products with an extended lifespan. Herein, a smart functionalized carboxylated nitrile rubber (XNBR) is prepared based on dynamic phototriggered disulfide metathesis and thermoreversible Diels–Alder (DA) “click chemistry.” In this case, the XNBR is functionalized with furfuryl amine (FA) followed by crosslinking with a dual functional crosslinker having a maleimide as well as a disulfide functionality for participating in the DA reaction and to induce the UV‐triggered disulfide metathesis reaction, respectively. The self‐healing properties are studied by thermal, mechanical, and microscopy analyses. The crosslinked materials present an impressive self‐healing efficiency of ≈88% and a tensile strength of ≈10 MPa without affecting its oil‐resistance property whereas pristine XNBR and furfuryl‐functionalized XNBR (FXNBR) show tensile strengths only 0.4 and 0.6 MPa, respectively. Furthermore, the crosslinked rubber is demonstrated to be recyclable, without much loss of its mechanical properties. In a nutshell, the use of this smart dual pathway of self‐healing can pave a new direction in sustainable development in NBR elastomers.

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Design of Rubber Composites with Autonomous Self-Healing Capability

Cited by 75 publications

References 56 publications

Role of Interface Structure and Chain Dynamics on the Diverging Glass Transition Behavior of SSBR-SiO₂-PIL Elastomers

Role of Interface Structure and Chain Dynamics on the Diverging Glass Transition Behavior of SSBR-SiO₂-PIL Elastomers

Improvement of Mechanical and Self-Healing Properties for Polymethacrylate Derivatives Containing Maleimide Modified Graphene Oxide

Dual‐Responsive Self‐Healable Carboxylated Acrylonitrile Butadiene Rubber Based on Dynamic Diels–Alder “Click Chemistry” and Disulfide Metathesis Reaction

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Design of Rubber Composites with Autonomous Self-Healing Capability

Cited by 75 publications

References 56 publications

Role of Interface Structure and Chain Dynamics on the Diverging Glass Transition Behavior of SSBR-SiO2-PIL Elastomers

Role of Interface Structure and Chain Dynamics on the Diverging Glass Transition Behavior of SSBR-SiO2-PIL Elastomers

Improvement of Mechanical and Self-Healing Properties for Polymethacrylate Derivatives Containing Maleimide Modified Graphene Oxide

Dual‐Responsive Self‐Healable Carboxylated Acrylonitrile Butadiene Rubber Based on Dynamic Diels–Alder “Click Chemistry” and Disulfide Metathesis Reaction

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Role of Interface Structure and Chain Dynamics on the Diverging Glass Transition Behavior of SSBR-SiO₂-PIL Elastomers

Role of Interface Structure and Chain Dynamics on the Diverging Glass Transition Behavior of SSBR-SiO₂-PIL Elastomers