Showing papers in "Polymer in 2009"

TL;DR: In this paper, graphite and functionalized graphene sheets (FGS) were used to construct polycarbonate composites with different degrees of graphite orientation and they were processed via injection, compression molding and long-term annealing.

TL;DR: In this paper, a review of the current knowledge on how solid nanoparticles organize in polymer blends is presented, focusing on the competition between thermodynamic wetting of the solid by the polymeric phases and kinetic control of the filler localization.

TL;DR: In this article, the surface of ramie cellulose whiskers has been chemically modified by grafting organic acid chlorides presenting different lengths of the aliphatic chain by an esterification reaction.

TL;DR: In this paper, the shape memory transition temperature of an amorphous SMP polymers is tuned by changing the crosslink density and the aliphatic epoxy chain length.

TL;DR: In this article, a robust in situ encapsulation method for protection of a variety of oil soluble solvents and reactive epoxy resins surrounded by a thin, polymeric, urea-formaldehyde (UF) shell is reported.

TL;DR: In this paper, the carbon nanofibers with diameters of 200-300nm were developed through stabilization and carbonization of aligned electrospun polyacrylonitrile (PAN) nanofiber bundles.

TL;DR: A comprehensive review of the development, functionalisation, physical properties and application of core cross-linked star polymers prepared by controlled radical polymerisation and the arm-first approach is provided in this article.

TL;DR: In this article, the authors demonstrate a dramatic improvement in the mechanical characteristics of PLA by its reactive blending with poly(ethylene-glycidyl methacrylate) (EGMA).

TL;DR: In this paper, a uniform, bead-free fiber production process is developed by optimizing electrospinning conditions: polymer concentration, applied electric voltage, feedrate, and distance between needle tip to collector.

TL;DR: In this paper, a review of recent studies on proton exchange membrane (PEM) materials for polymer electrolyte fuel cells is presented, focusing on the development of novel sulfonated aromatic hydrocarbon polymers for PEMs.

TL;DR: In this article, the effect of different sized alumina (Al2O3) nanoparticles on the mechanical properties of thermoset epoxy-based nanocomposites is investigated using molecular dynamic simulations combined with sequential scale bridging methods.

TL;DR: In this article, a nanohybrid shish-kebab (NHSK) structure was proposed, where the CNT serves as the shish and polymer crystals are the kebabs.

TL;DR: In this paper, N-butyl, N-hexyl-, Nhexyl), N-octyl-, and N,N-dihexylacrylamides were used as the hydrophobes in the hydrogel preparation.

TL;DR: In this paper, the gas transport properties and physical aging behavior of free-standing glassy polysulfone and Matrimid® films as thin as 18nm are presented.

TL;DR: Melt blending of polylactide (PLA) and biodegradable polyamide elastomer (PAE) has been performed in an effort to toughen the PLA as discussed by the authors.

TL;DR: In this article, a novel styrene-butadiene-styrene tri-block copolymer (SBS) and poly(δ-caprolactone) (PCL) blend was introduced for its shape memory properties.

TL;DR: In this paper, a chitosan-based nanofibrous filter media with varying fiber diameter and filter basis weight was used for a wide variety of filtration applications ranging from water purification to air filter media.

TL;DR: In this paper, a mixture of cationic chitosan and neutral poly(ethylene oxide) (PEO) at a ratio of 3:1 in aqueous acetic acid was fabricated by electrospinning.

TL;DR: In this article, a study on the Cryogenic mechanical properties of multi-walled carbon nanotube reinforced epoxy nanocomposites, which are prepared by adding multi-wall carbon Nanotubes (MWCNTs) to diglycidyl ether of bisphenol-F epoxy via the ultrasonic technique, is presented.

TL;DR: In this article, a strategy to synthesize electrospun polymeric nanofiber mats containing spider-net binding the main nanofibers was introduced, which improved the mechanical properties and the wetability of the nylon6 and poly(vinyl alcohol) mat.

TL;DR: In this article, two types of nanosilica (NS) particles with different average particle sizes (20 and 80 nm in diameter) were used to fabricate epoxy-silica nanocomposites (ESNs).

TL;DR: In this paper, the morphology and crystal polymorphism of electrospun composite nanofibers of poly(vinylidene fluoride) (PVDF) with two nanoclays: Lucentite™ STN and SWN.

TL;DR: The nucleating ability of halloysite nanotubes (HNTs) towards isotactic polypropylene (iPP) was investigated by differential scanning calorimetry (DSC), X-ray diffraction (XRD), polarized optical microscopy (POM) and scanning electron microscopy as discussed by the authors.

TL;DR: In this paper, the authors show that the structure and behavior of single-walled nanotubes (SWNTs) are essentially polymeric; in fact, many have referred to SWNTs as the ultimate polymer.

TL;DR: In this article, a series of scratch tests were carried out on four categories of polymers: I) ductile and strong, II) ductiles and weak, III) brittle and weak and IV) brittle-and-strong.

TL;DR: A cellulose-based macro-initiator, cellulose 2-bromoisobutyrylate, for atom transfer radical polymerization (ATRP) was successfully synthesized by direct homogeneous acylation of cellulose in a room temperature ionic liquid, 1-allyl-3methylimidazolium chloride, without using any catalysts and protecting group chemistry as mentioned in this paper.

TL;DR: In this paper, the effects of air cooling conditions, chill roll temperature, and draw ratio on the crystalline orientation, morphology, mechanical and tear properties of linear polypropylene (L-PP) cast films were investigated.

TL;DR: In this article, a method for the continuous dispersion of multi-walled carbon nanotubes (MWNTs) in a polymer matrix for manufacturing high performance nanocomposites was developed using an ultrasonically assisted twin screw extrusion process.

TL;DR: In this article, a self-healing polymer that combines a microencapsulated liquid healing agent and shape memory alloy (SMA) wires is presented, where the SMA wires are activated to close the crack during the healing period.

TL;DR: In this paper, a novel biodegradable multiblock poly(ester urethane) (PEU) consisting of poly( l -lactic acid) (PLLA) and poly(butylene succinate)(PBS) blocks, has been successfully synthesized via chain-extension reaction of dihydroxyl terminated PLLA and PBS prepolymers (PBS-OH) using toluene-2,4-diisocyanate (TDI) as a chain extender.