Self‐Assembly Strategy for Double Network Elastomer Nanocomposites with Ultralow Energy Consumption and Ultrahigh Wear Resistance

Abstract

One of environmental crises facing the world is due to rubber auto tires destruction pollution. Tires' exploitation in vehicles consumes 6 % of the world's energy and causes 5 % of carbon dioxide emissions; it releases up to 10 % of the microplastic pollution found in oceans.We designed a new rubber nanocomposite self-assembled from hard and soft elastomer matrixes: the polybutadiene with two hydroxy chain ends reacted with 4,4'-diphenylmethane diisocyanate to form segmented polyurethane. This system first undergoes a self-assembly, forming well-defined nanoscale hard domains distributed in the soft matrix. Then, cross-linking between the soft segments was accomplished by a controlled radiation method, resulting in the double network elastomer (DN-E). Remarkably, DN-E exhibited the lowest reported loss factor value at 60 o C. The index of energy dissipation in the rolling tire This article is protected by copyright. All rights reserved. 3 demonstrated a prominent reduction of 72 %, accomplished with 88 % decrease in energy loss, and 85 % less wear loss, as compared with best earlier reported commercial tires. These new double-network materials open a new prospective for design and fabrication of ultralow energy-consumption and strong abrasion-resistance elastomers, which establishes a milestone for the development of the next generation of green low pollution tires causing much less energy dissipation.

Enhancing the Performance of Rubber with Nano ZnO as Activators

“…Figure S14a,b and d,e displays the obtained storage mechanical modulus E ′ and loss factor tan δ as a function of temperature collected by DMA for each ZnO/natural rubber composite. Figure S14c and f shows the tan δ value at 60 °C of the ZnO/natural rubber composites vs ZnO contents, that the tan δ value at 60 °C is coupled to the cross-linking density . Combined with cross-linking density measurements, as the ZnO content increases, the cross-linking density of the products increases, which is associated with a decrease in the tan δ values.…”

Sandwich-Layered Dielectric Film with Intrinsically Excellent Adhesion, Low Dielectric Constant, and Ultralow Dielectric Loss for a High-Frequency Flexible Printed Circuit

“…Nevertheless, it is still a great challenge to balance the paradox between superior dielectric property and excellent adhesion. , As a thermosetting polyolefin resin, 1,2-polybutadiene (1,2-PB) has shown great potential as a matrix resin in the fields of electronics, insulations, adhesives, coatings, automobile tires, , and toughening modifiers . Attributed to the low electronic polarizability of C–C and C–H bonds in polyolefins, 1,2-PB exhibits low dielectric constant and ultralow dielectric loss over wide frequency and temperature ranges. , Unfortunately, unmodified nonvulcanized polybutadiene (PB) also suffers from inherent drawbacks such as poor interfacial adhesive strength between the resin and copper foil and easy creeping, which make it hard to adhere with other substances (e.g., copper foil) and to laminate them.…”

“…Nevertheless, it is still a great challenge to balance the paradox between superior dielectric property and excellent adhesion. 21,22 As a thermosetting polyolefin resin, 1,2polybutadiene (1,2-PB) has shown great potential as a matrix resin in the fields of electronics, 23 insulations, 24 adhesives, coatings, automobile tires, 25,26 and toughening modifiers. 27 Attributed to the low electronic polarizability of C−C and C− H bonds in polyolefins, 1,2-PB exhibits low dielectric constant and ultralow dielectric loss over wide frequency and temperature ranges.…”

Influence of Oligopeptide Length and Distribution on Polyisoprene Properties

“…One is the formation of branching structures which elevated the entanglement of polyisoprene chains, and another one is the dissociation of noncovalent interactions to dissipate energy which are both closely related to the terminal supramolecular interactions. However, although a great deal of research has been conducted focused on the mechanism of supramolecular interactions on comprehensive properties, the support regarding terminal interactions such as NR is rare [11,12]. Moreover, the contributions of terminal groups are generally verified in tensile strength [13], dimensional stability [14], shape memory [15] and so on because of their unique structures.…”