Construction of multiple crosslinking networks in EPDM rubber: Synergistic reinforcing effect of graphene-zinc dimethacrylate on EPDM and improvement mechanism of sealing resilience

Yuan, Zun; Li, Weihang; Li, Chengjie; Ye, Lin

doi:10.1016/j.compositesa.2019.03.039

Cited by 38 publications

(23 citation statements)

References 37 publications

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“…It is always a long-term challenge to maintain excellent resilience properties when loading the nano-filler into elastomer. 30 Therefore, to further explore the advantages of the microstructure of TPV/MWCNTs elastomer, the uniaxial stretching-recovery at a strain of 20 and 50% have been conducted for these series composites, as shown in Figures 6 and 7. It is worth noting that the residual strain for all the TPV/MWCNTs elastomer is nearly the same even when the tension strain rises to 50% and the MWCNTs loading is up to 4.1 vol%.…”

Section: Resilience Properties Of Tpv/ Mwcnts Elastomermentioning

confidence: 99%

Multiwalled carbon nanotubes filled thermoplastic vulcanizate dielectric elastomer with excellent resilience properties via inhibiting MWCNT network formation

Dou

2020

J of Applied Polymer Sci

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Multiwalled carbon nanotubes (MWCNTs) filled thermoplastic vulcanizate (TPV) dielectric elastomer based on polypropylene (PP)/ethylene-propylenediene monomer blends were fabricated via a simple melt compounding. MWCNT could be selectively distributed in PP matrix which induced by the dynamic vulcanization reaction. By reducing the rotor speed of melting blending to 60 rpm, the MWCNT network formation can be effectively inhibited, which have been verified by a higher volume resistivity (above 10 9 Ω cm). With increasing the MWCNTs loading to 4.1 vol%, a maximum increase, 423.4% (from 3.04 to 12.87), of the dielectric constant have been achieved for TPV/MWCNTs elastomer at 10 3 Hz, while the dielectric loss is still lower than 0.072 at 10 1-10 3 Hz. Meanwhile, with various MWCNTs loading, the tensile recovery of these series TPV elastomer does not change anymore, resulting an excellent rebound resistance. The TPV elastomer exhibits an enhanced dielectric performance and balanced elastic recovery performance, providing a simple and scalable melt compounding approach to fabricate high-performance dielectric elastomer.

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Section: Resilience Properties Of Tpv/ Mwcnts Elastomermentioning

confidence: 99%

Multiwalled carbon nanotubes filled thermoplastic vulcanizate dielectric elastomer with excellent resilience properties via inhibiting MWCNT network formation

Dou

2020

J of Applied Polymer Sci

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“…Polymerized chains of ZDMA tend to aggregate to form granular nanoparticles, which can be physically adsorbed or chemically grafted onto rubber chains. These structures are considered to be physical or chemical cross‐linking points of the composites . Thus, ZDMA contributes to the formation of a complex cross‐link network structure within the rubber matrix and increases the cross‐link density.…”

Section: Resultsmentioning

confidence: 99%

Rubber magnets based on NBR and lithium ferrite with the ability to absorb electromagnetic radiation

Kruželák

Kvasničáková

Ušák

et al. 2020

Polymers for Advanced Techs

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Rubber magnetic composites were prepared through the incorporation of magnetic soft lithium ferrite into acrylonitrile butadiene rubber. Standard sulfur-based curing and peroxide curing systems were used for cross-linking of rubber matrices. The experimental part was focused on the investigation of ferrite content and curing system composition on cross-link density, physical-mechanical, magnetic and shielding characteristics of composites. The results demonstrated that cross-link density and physical-mechanical properties of composites can be modified by both the amount of ferrite and composition of the curing system. The influence of curing systems on magnetic properties was negligible. It can be stated that the application of lithium ferrite to rubber matrix leads to the preparation of rubber composites with the ability to efficiently absorb harmful electromagnetic radiation in the tested frequency range. The shielding efficiency of composites increased with increasing content of magnetic filler. K E Y W O R D S electromagnetic radiation shielding, magnetic filler, peroxide curing, rubber magnets, sulfur curing

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“…A small number of DCP free radicals are used for covalent crosslinking of PNB. At the same time, a small quantity of PZDMA is grafted with PNB molecular chains to form PNB‐graft‐ZDMA . Therefore, along with the increase of ZDMA, the complex crosslinking networks are mainly composed of ionic crosslinking, covalent crosslinking, and various physical entanglements are formed in the PNB/ZDMA composite.…”

Section: Resultsmentioning

confidence: 99%

“…Zinc dimethacrylate (ZDMA) will polymerize under the initiation of peroxide crosslinker. ZDMA molecules contain metal cations and acid anions, which form an ionic crosslinking network within the polymer matrix, thereby increasing the crosslink density of the polymer. ZDMA was first used to reinforce hydrogenated nitrile rubber (HNBR) and natural rubber (NR).…”

Section: Introductionmentioning

confidence: 99%

Effects of dual‐crosslinking networks on shape memory performance of polynorbornene

Gong

Yin

Zhang

et al. 2020

J of Applied Polymer Sci

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In this article, Polynorbornene (PNB)/Zinc dimethacrylate (ZDMA)/Dicumyl peroxide (DCP) composites can form dualcrosslinking networks, which contain an ionic crosslinking network, and a part of the C─C covalent crosslinking network. DCP was used to initiate the polymerization of ZDMA to form ionic crosslinking bonds. With the increase of ZDMA, the total crosslink density (V r ) and ionic crosslink density (V r2 ) increased. DCP was consumed in ZDMA polymerization, which made the PNB reduce the covalent crosslinking networks. Leading to the covalent crosslink density (V r1 ) decreased. Compared with covalent crosslinking network, the dual-crosslinking networks stored more energy when deformed, provided better restoring force and a higher shape recovery ratio for materials. When ZDMA exceeded 3.9 wt%, the ZDMA aggregates hindered the movement of molecular chains leading to the shape recovery ratio slightly decreased. When ZDMA was 2.4 wt%, the composite had an optimum shape fixing and shape recovery ratio. This article provided the experimental basis for the research of PNB dual-crosslinking networks, also widened the research of PNB shape memory materials.

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Construction of multiple crosslinking networks in EPDM rubber: Synergistic reinforcing effect of graphene-zinc dimethacrylate on EPDM and improvement mechanism of sealing resilience

Cited by 38 publications

References 37 publications

Multiwalled carbon nanotubes filled thermoplastic vulcanizate dielectric elastomer with excellent resilience properties via inhibiting MWCNT network formation

Multiwalled carbon nanotubes filled thermoplastic vulcanizate dielectric elastomer with excellent resilience properties via inhibiting MWCNT network formation

Rubber magnets based on NBR and lithium ferrite with the ability to absorb electromagnetic radiation

Effects of dual‐crosslinking networks on shape memory performance of polynorbornene

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