Interplay of Grafted and Adsorbed Chains at the Polymer–Particle Interface in Tuning the Mechanical Reinforcement in Polymer Nanocomposites

Cui, Wenzhi; You, Wei; Yu, Wei

doi:10.1021/acsapm.3c02700

Cited by 5 publications

(1 citation statement)

References 63 publications

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“…The matrix–filler interface effect is primarily determined by interactions between particle surface and polymers, which is influenced by the microstructure of polymer matrix and particle surface. , The interface effect in determining mechanical properties is revealed by the strain compatibility between the matrix and filler . The applied load is transferred from the matrix to filler particles through the interface.…”

Section: Introductionmentioning

confidence: 99%

Promoting Cross-Link Reaction of Polymers by the Matrix–Filler Interface Effect: Role of Coupling Agents and Intermediate Linkers

Huang,

Wang,

Wang

et al. 2024

J. Phys. Chem. B

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The matrix−filler interface effect plays an important role in determining the structural stability and mechanical properties of polymer composite materials, which remain ambiguous and need to be studied. The network-forming dynamics of poly(3,3-bis (azidomethyl) oxetane−tetrahydrofuran) (PBT) at the ammonium perchlorate (AP) surface was studied by using atomistic molecular dynamics simulation, considering the additives of curing agent toluene diisocyanate (TDI), cross-linker trimethylolpropane (TMP), and coupling agent triethanolamine (TEA). The presence of the AP surface promotes chain cross-link reaction, which is attributed to the increased production of intermediate linkers formed by TDI, TMP, and TEA. The intermediate linker has three reactive sites that can react with PBT main chains to form a cross-linked structure. Owing to the strong interaction with the AP surface, the coupling agent TEA plays a dominant role in forming the intermediate linker. At the early stage of network forming (reaction ratio r < 30%), the AP surface adsorbs TEA, which leads to a maximum contact density to PBT. As r increases to 60%, the density of intermediate linkers near the AP surface reaches a maximum value. Consequently, the chain cross-link reactions between the intermediate linker and PBT main chains are enhanced as r > 60%. This work explains the micromechanism of the promotion of chain cross-link reaction by the interface effect and provides important insights on designing polymer materials with high mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Promoting Cross-Link Reaction of Polymers by the Matrix–Filler Interface Effect: Role of Coupling Agents and Intermediate Linkers

Huang,

Wang,

Wang

et al. 2024

J. Phys. Chem. B

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Dual nanoparticles effect on the frictional and vibrational dissipation behaviors of polymer‐based water‐lubricated bearing materials

Li,

Dong,

Yuan

et al. 2024

J of Applied Polymer Sci

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Marine water‐lubricated bearings have the advantages of environmental friendliness and long replacement cycle. However, when under the complex lubrication circumstance, the frictional and vibrational behaviors of water‐lubricated bearing always dissipate the mechanical energy output from the ship's diesel engine. Aiming at this problem and combining with previous research findings, in this paper, ceramic balls with similar mechanical properties to ship's main shaft were selected as the friction counterpart to simulate the operating conditions of marine water‐lubricated bearing. Meanwhile, dual nanoparticles of tungsten disulfide (WS2) and titanium dioxide (TiO2) were used to modify ultra‐high molecular weight polyethylene (UHMWPE) bearing material. The tribological and vibrational properties of the prepared composites were carefully investigated. The results showed that compared to pure UHMWPE, with the synergistic effect of 0.75 wt% WS2 and 0.9 wt% TiO2, the frictional and vibrational behaviors of the composites were reduced by 43.3% and 42.7%. Mechanical testing and microscopic characterization revealed the enhancement mechanism of these nanoparticles on UHMWPE. This study proposed a design strategy on marine water‐lubricated bearings for engineering application.

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Tailoring the size and shape of PbWO₄ particles in highly filled polymer fibers for γ‐rays shielding

Hu,

Zhang,

Liu

et al. 2024

Polymer Composites

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Highly filled polymer fibers offer huge promise for radiation protection safety and wear comfort of personal protective equipment (PPE) in radiation environments. However, it usually sacrifices mechanical properties that directly related to practical usability. Here, as high as 75 wt% PbWO4 (PWO) particles have been filled in polyvinyl alcohol (PVA) fiber via tailoring their size and shape for enhanced γ‐rays shielding and good mechanical properties. Clearly shown that 0 dimensional (0‐D) PWO exhibits better dispersion and compatibility between the interfaces than 1‐D PWO in highly filled PVA fibers. In addition, 70 wt% 0‐D PWO/PVA fibers display better mechanical properties than 70 wt% 1‐D PWO/PVA fibers. Note that 75 wt% 0‐D PWO/PVA fibers show 1.02 cN/dtex of tensile strength. However, 75 wt% 1‐D PWO/PVA fibers fail to be fabricated smoothly. Importantly, the overlapped fabrics with 75 wt% 0‐D PWO/PVA fibers display 43.05% of γ‐ray shielding (105 keV) meanwhile it offers good air and water vapor permeability for wear comfort. The superior γ‐ray shielding ascribes the polymer fibers with the higher filling in comparison with its counterpart, which provides a practical means to design radiation protection safety and wear comfort of articles.Highlights This work breaks the upper limit of filling in polymer fibers Filler structure can weigh the integrated properties of polymer fibers. 0‐D PWO particles promote interfacial compatibility in highly filled fibers. Radiation protection safety and wear comfort of articles tend to be designed.

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Interplay of Grafted and Adsorbed Chains at the Polymer–Particle Interface in Tuning the Mechanical Reinforcement in Polymer Nanocomposites

Cited by 5 publications

References 63 publications

Promoting Cross-Link Reaction of Polymers by the Matrix–Filler Interface Effect: Role of Coupling Agents and Intermediate Linkers

Promoting Cross-Link Reaction of Polymers by the Matrix–Filler Interface Effect: Role of Coupling Agents and Intermediate Linkers

Dual nanoparticles effect on the frictional and vibrational dissipation behaviors of polymer‐based water‐lubricated bearing materials

Tailoring the size and shape of PbWO₄ particles in highly filled polymer fibers for γ‐rays shielding

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Interplay of Grafted and Adsorbed Chains at the Polymer–Particle Interface in Tuning the Mechanical Reinforcement in Polymer Nanocomposites

Cited by 5 publications

References 63 publications

Promoting Cross-Link Reaction of Polymers by the Matrix–Filler Interface Effect: Role of Coupling Agents and Intermediate Linkers

Promoting Cross-Link Reaction of Polymers by the Matrix–Filler Interface Effect: Role of Coupling Agents and Intermediate Linkers

Dual nanoparticles effect on the frictional and vibrational dissipation behaviors of polymer‐based water‐lubricated bearing materials

Tailoring the size and shape of PbWO4 particles in highly filled polymer fibers for γ‐rays shielding

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Product

Resources

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Tailoring the size and shape of PbWO₄ particles in highly filled polymer fibers for γ‐rays shielding