Due to the multiple different properties in self-healing elastomers that are mutually exclusive based on and contradictory molecule chain structures, simultaneously achieving ultrahigh mechanical performance high durability of is a great challenge goal has always been pursued. Herein, we report novel strategy fabricate elastomer by introducing interlaced hydrogen bonds with superhigh binding energy. Distinguishing from quadruple reported already, bond lower repulsive secondary interaction...

Abstract Aiming at the common problems of weak controllability damping temperature range and poor mechanical properties in elastomer materials. Herein, we design a polyurethane‐containing dynamic disulfide bonds dangling chains to address this dilemma. The as‐prepared polyurethane exhibits an unprecedented 182°C (−62 120°C), tensile strength reaches 6.8 MPa, which is forefront same type research. We innovatively introduce aromatic disulfides system, can be spontaneously exchanged dynamically...

Irregular networks based on the condensation reaction of hydroxyl‐terminated poly(dimethylsiloxane) with cross‐linkers were investigated. The have excellent damping properties in a wide temperature range utilizing viscoelastic relaxation irregular network dangling chains. NMR Cross‐link Density Spectroscopy was used to explore weight fraction pendant chains and elastic elastomer. transverse time for elastomer studied influence effects structure molecular precursors detail. Elastomers...

Abstract The design and synthesis of high‐performance polyurethane with excellent damping performance superior mechanical property is a challenge owing to conflicting attributes performance. Herein, we innovatively introduced dynamic aromatic disulfide bonds suitable catalysts into the system synthesized elastomer both admirable (wide temperature range [ tan δ ≥ 0.3] 148°C) properties (16.8 MPa, 960%). In our design, (i) exchange reaction above room able enhance energy dissipation segmental...

Based on the blends of chlorinated butyl rubber (CIIR), nitrile butadiene (NBR) and chloroprene (CR), a kind high damping elastomer with broad temperature frequency ranges is prepared. CIIR/NBR binary blend prepared to take advantage immiscibility large difference in cross‐link density different phases caused by curatives accelerators migration. The dynamic mechanical analysis reveals that was immiscible its loss factor (tanδ) versus curves show two separated expanded peaks when compared...

Vibration and noise severely affect the operation of mechanical equipment is also detrimental to human health. Therefore, development high performance damping materials crucial. However, current methods improve properties often come at expense properties, resulting in inferior materials. In order address issue imbalance between polyurethane elastomers. this study, polyester dangling chains containing polar groups are synthesized introduced into polyurethane. The obtained exhibited an...

A molecular dynamics study of a high-damping polyurethane elastomer is performed by introducing MPEG dangling chains and dynamic bonds.

The special immiscible elastomer blends with broad damping temperature range derived from ethylene-propylene-diene-monomer rubber (EPDM) and epoxidized natural (ENR) (the extent of epoxidation is 50%, ENR-50) were prepared characterized by different techniques. Dynamic mechanical analysis results showed two not only separate but expanded loss peaks EPDM/ENR-50 compared their pure component; transmission electron microscope scanning confirmed the immiscibility this binary blends; energy...

The damping properties of epoxidized natural rubber (ENR) are investigated by the dynamic mechanical analysis in this article. Time–temperature superposition isotherms give change property with frequency each cured ENR. Due to existence intermolecular hydrogen bonds between ENR and phenolic resin, resin as curing agent shows much broader effective (tanδ > 0.3) temperature range than that using other two agents, sulfur peroxide systems, its reaches nearly 150°C covers from 10 −5 9 Hz....

It is urgent for polyurethane (PU) damping materials to broaden the effective range. Based on designability of PU, this study focused role long dangling chain, wherein prepared by reaction polyethylene glycol monomethyl ether with toluene-2,4-diisocyanate. Notably, introduction chain not only makes longer and enhances intermolecular interaction but also equips strong polar carbamate group, bringing about more excellent compatibility soft hard segments lower degree microphase separation under...

Giving waterborne polyurethane (WPU) coatings self-healing properties not only maintains the coating's environmentally friendly characteristics but also extends material's service life and enables sustainable development. Therefore, WPUs have received an increasing amount of attention from researchers. However, it is a serious challenge to overcome original shortcomings WPU coatings, such as poor strength, low hardness, weak adhesion, well introduction resulting in further degradation...

Medical guide wires play a crucial role in the process of intravascular interventional therapy. However, it is essential for bare metal to possess both hydrophilic lubricity and coating durability, avoiding tissue damage caused by friction inside blood vessel during procedure. Additionally, still huge challenge diverse materials bind with polymer coatings easily. Herein, we present hydrogel scheme its preparation method various under mild conditions environmental protection purposes. The...

Abstract To address the issues that waste of resources and environmental pollution caused by discarded materials, dynamic bonds are widely introduced into polymers to endow them with reprocess ability. However, there some obvious in existing research such as poor toughness, low fracture elongation, inability for repeated reprocessing materials. Considering above problems, this study introduces dense hydrogen bonding cation–π interactions polyurea system, develops a high‐performance...