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.

Topography and Surface Composition of Thin Films of Blends of Polystyrene with Brominated Polystyrenes: Effects of Varying the Degree of Bromination and Annealing

Abstract: A series of thin films of blends of poly(styrene-d8) and poly(styrene-co-p-bromox-styrene), where 1 ≥ x ≥ 0, cast on to silicon wafers are examined by atomic force microscopy, X-ray photoelectron spectroscopy, and static secondary ion mass spectrometry. Films deposited on wafers stripped of the native oxide are smooth. The poly(styrene-d8) component segregates to the polymer−air interface, and the extent of segregation increases with the degree of bromination. An inverse linear correlation is obtained between the extent of segregation and the polymer compatibility, the latter measured by the interfacial width of bilayer films. For films deposited on wafers retaining the oxide, topographical features are observed with dimensions depending on the blend composition and degree of bromination of the polymer. The bromopolymer forms islands that are raised. The most pronounced topography is found with blends containing the fully brominated styrene. Reducing the degree of bromination increases the polymer compati...

Process for producing compatibilized polymer blends

Abstract: A process is provided for producing a compatibilized polymeric blend. A first thermoplastic polymer and a reactive moiety are provided to a progressive melt kneading apparatus. The reactive moiety comprises a first reactive group capable of reacting with the first thermoplastic polymer but not a second polymer and a second reactive group capable of reacting with the second polymer but not the first polymer. The first thermoplastic polymer and the reactive moiety are then melt kneaded so that the first reactive group reacts with the first thermoplastic polymer and the second reactive group is grafted to the first thermoplastic polymer, forming a molten self-compatibilizer. A molten second polymer is then provided. The molten self-compatibilizer is melt kneaded with the molten second polymer so that the second reactive group reacts with the second polymer to form a compatibilized polymeric blend. Also provided are articles formed from the compatibilized polymer blend.

Influence of Surfactant Type and Concentration on Electrospinning of Chitosan–Poly(Ethylene Oxide) Blend Nanofibers

Abstract: Electrospun blend nanofibers were fabricated from chitosan (1,000 kDa, 80% DDA) and poly(ethylene oxide) (PEO; 900 kDa) at a ratio of 3:1 dispersed in 50% and 90% acetic acid. The influence of surfactants on the production of electrospun nanofibers was investigated by adding nonionic polyoxyethylene glycol dodecyl ether (Brij 35), anionic sodium dodecyl sulfate, or cationic dodecyl trimethyl ammonium bromide below, at, and above their specific critical micellar concentration to the polymer blend solution. Viscosity, conductivity, and surface tension of polymer solutions, as well as morphology and composition, of nanofibers containing surfactants were determined. Pure chitosan did not form fibers and was instead deposited as beads. Addition of PEO and an increasing concentration of surfactants induced spinnability and yielded larger fibers with diameters ranging from 10 to 240 nm. Surfactants affected morphology yielding needle-like, smooth, or beaded fibers. Compositional analysis revealed that nanofibers consisted of both polymers and surfactants with concentration of the constituents in nanofibers differing from that in polymer solutions. Results suggest that surfactants may modulate polymer–polymer interactions thus influencing the morphology and composition of deposited nanostructures.

Polyesters including isosorbide as a comonomer blended with other thermoplastic polymers

Abstract: A polymer blend including a polyester and another thermoplastic polymer. The polyester includes terephtaloyl moieties and, optionally, other aromatic diacid moieties; and ethylene glycol moieties; optionally diethylene glycol moieties; isosorbide moieties; and, optionally one or more other diol moieties. The polyester has an inherent viscosity of at least about 0.35dL/g.