Core–shell polybutadiene-graft-polystyrene (PB-g-PS) graft copolymers with different ratios of PB to PS are synthesized by emulsion polymerization. Further, the PB-g-PS blended polypheylene ether (PPE) and prepare PPE/PS/PB-g-PS blends. The effects copolymer structure matrix composition on morphological, mechanical properties, deformation mechanism blends studied. results show that submicromete...

Abstract The dry-type on-board traction transformer (DOBTT) has the characteristics of huge heat generation and high dissipation requirements, so it higher requirements for performance epoxy resin (EP) insulation. However, toughness existing thermal conductivity EP composite after being modified by inorganic particles is greatly reduced, very easy to crack under occasion frequent vibration such...

Catalytic cyclopropanation of commercial 1,2or 1,4cis-polybutadiene, respectively, with ethyl diazoacetate catalyzed by [TpCu(NCMe)] (Tp 1⁄4 hydrotris(3,4,5-tribromo-1-pyrazolyl)borate) at room temperature afforded high molecular weight (Mn > 10 5 mol ) side-chain or main-chain, respectively, carboxyethyl cyclopropyl-substituted polymers with variable and controlled degrees of functionalization...

Quantification of elastomer content for the ethylene-propylene diene monomer/polybutadiene blend are seldom subjects in literature, mainly due to rubber compatibility problems. However, suitable contents can lead desirable properties. Infrared spectroscopy quantify this type even if some bands overlap, which be resolved with proper choice spectrum obtaining mode and non-overlapping analytical b...

This communication presents a determination of the glass transition of polybutadiene under very high pressure, and raises the problem of the determination of the relative effects of temperature and density on the glass transition, depending on the pressure and temperature conditions. Local structure and slow dynamics were studied, by neutron scattering and calorimetry. To the best of our knowle...

The homogeneous non-catalytic hydrogenation of cis-1,4 poly(isoprene), isotactic cis-1,4 poly(1,3-pentadiene) and syndiotactic cis-1,4 poly(1,3-pentadiene) with diimide, formed by thermal decomposition of para-toluenesulfonylhydrazide, is examined. Perfectly alternating ethylene/propylene copolymers having different tacticity (i.e., isotactic and syndiotactic), which are difficult to synthesize...

cis-polybutadiene was functionalized using in–situ generated dmd as oxidant and tetra-n-butyl ammonium bromide as phase transfer catalyst (ptc). the epoxidation process was investigated by 1hnmr spectroscopy. 1hnmr spectrum analysis of products confirms the absence of ring opening side products in epoxidation reaction. various factors such as reaction temperature, reaction time and the concentr...

microstructural investigation of low molecular weight 1,4-polybutadiene (1,4-pbd) was studied by 1h and 13c nuclear magnetic resonance spectroscopy (nmr). the isomer contents of 1,4-cis, 1,4-trans and 1,2- vinyl in polybutadiene microstructure were determined. the number average molecular weight for low molecular weight polybutadiene was measured by nmr techniques and comparison was made with g...

Due to the wide use of rubber components in different engineering applications such as vibration isolators, engine mounts, car tires, and bridge bearing pads, etc. This component mostly subjected high levels noise which are among most reasons that lead failure structures. In present paper has been performed experimentally investigate influences: content ratios natural (NR) polybutadiene (BR.cis...