نتایج جستجو برای: sbr styrene butadiene rubber
تعداد نتایج: 26851 فیلتر نتایج به سال:
Calorimetric Study on Plastic-to-Rubber Transition in a Styrene–Butadiene–Styrene Triblock Copolymer
The replacement of one of the two C5Me5 ligands in the samarocene(II) complex (C5Me5)2Sm(thf)2 with a monodentate anionic ligand such as OAr, SAr, NR1R2, or CH(SiMe3)2 gave a unique catalytic system, which can not only polymerize styrene and ethylene, but also copolymerize them into block styrene–ethylene copolymers under the presence of both monomers. On the other hand, the addition of an appr...
OBJECTIVES The purpose of this study is to evaluate the tire manufacturing work environments extensively and to identify workers' exposure to hazardous substances in various work processes. METHODS Personal air sampling was conducted to measure polycyclic aromatic hydrocarbons, carbon disulfide, 1,3-butadiene, styrene, methyl isobutyl ketone, methylcyclohexane, formaldehyde, sulfur dioxide, a...
The combination of a neodymium borohydride, Nd(BH4)3(THF)3 (1) or Cp*Nd(BH4)2(THF)x (2), with MgBuEt (BEM), affords an efficient and highly selective (up to 96.7% 1,4-trans) catalyst for butadiene polymerization. In the presence of excesses of Mg co-catalyst, polymer chain transfer takes place between neodymium and magnesium, and significant amounts of 1,2-units are observed. When considered fo...
Flexible power sources such as batteries are essential to realize wearable and conformable electronic devices. The mechanical stability of the electrodes plays an important role in determining overall flexibility battery. Styrene block copolymers-based elastomers have potential be used binder materials for retaining their structural integrity under flexing during regular use. In this work, we d...
This work is devoted to identifying the patterns of influence vulcanization accelerator N-cyclohexyl-benzothiazyl-sulfenamide (CBS) on technological, physico-mechanical, and thermo-physical properties vulcanizates based styrene-butadiene rubber. It was found that a decrease in content decreases maximum torque, noticeably longer time required for optimum absence CBS. The thermal conductivity inc...
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