Topic
Polymer blend
About: Polymer blend is a research topic. Over the lifetime, 18474 publications have been published within this topic receiving 437183 citations. The topic is also known as: polymer mixture & Polymerblend 或者 Polyblend.
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TL;DR: In this article, a mixture of isotactic polypropylene, PP and atactic polystyrene (PS) was used to study the nucleation mechanism of immiscible melt mixed blends of a crystallisable polyolefin (isotactic PP) and PS in a wide composition range.
Abstract: Immiscible melt mixed blends of a crystallisable polyolefin (isotactic polypropylene, PP) and atactic polystyrene (PS) were prepared in a wide composition range. It was found that when PP is the major component in the blend its crystallisation behaviour is not affected by blending it with PS. However if PP is the minor component, it will be dispersed in the immiscible PS matrix, hence the nucleation mechanism changes from predominantly heterogeneous to predominantly homogeneous as long as the size of the dispersed PP droplets is below a critical value (of the order of 1–2 μm).
109 citations
TL;DR: The critical fluctuations of a polymer blend (PVME/d-PS) were investigated by neutron small angle scattering, and a mean-field behavior was observed, except in a region very close to the critical temperature where a transition to an Ising-like behavior occurs.
Abstract: The critical fluctuations of a polymer blend (PVME/d-PS) were investigated by neutron small angle scattering. A mean-field behavior was observed, except in a region very close to the critical temperature where a transition to an Ising-like behavior occurs. The width of this region is T-${\mathrm{T}}_{\mathrm{c}}$\ensuremath{\simeq}2.4 K for a mixture with average molecular weights of 89 000 (PVME) and 232 000 (d-PS).
109 citations
TL;DR: In this paper, the structure, mechanical and tribological properties of polyamide 66 (PA66) and polyphenylene sulfide (PPS) blends were studied, and the results indicated that the crystalline structure of PA66, PPS and PA66/PPS blends changed due to sliding and tribochemical reactions occurred with the PA66 and the PA 66 phases in blends.
109 citations
109 citations
TL;DR: Raman and surface-enhanced Raman spectra have been obtained for poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS), a polymer blend widely used as a semitransparent, hole-transporting electrode coating in organic polymer-based photovoltaic cells as discussed by the authors.
Abstract: Raman and surface-enhanced Raman spectra have been obtained for poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS), a polymer blend widely used as a semitransparent, hole-transporting electrode coating in organic polymer-based photovoltaic cells. Spectra of thin films are reported for both the as-received (oxidized or doped) PEDOT:PSS and samples in which the PEDOT has been chemically reduced with hydrazine. The Raman spectra of the polymer blend are dominated by lines attributable to PEDOT and the oxidized and reduced species have clearly distinct Raman spectra at excitation wavelengths of 457.9, 514.5, and 632.8 nm. The Raman spectra in the ring stretching region exhibit changes in the presence of Au or Ag which depend on the method of deposition of the nanoparticles. Ag nanoparticles appear to facilitate reoxidation of chemically reduced PEDOT. Light-induced changes in the Raman spectra in the presence of Ag nanoparticles are consistent with addition of oxygen to the sulfur atoms in the ...
109 citations