Effect of fumed silica nanoparticles on glass fiber filled thermotropic liquid crystalline polymer composites

Kim, Seong Hun; Hwang, Jin Taek

doi:10.1002/pc.20557

Cited by 9 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The modulus of the samples PES+1.0%R380 and PES2.5%R380 was smaller than that of neat PES. Similar reduction in modulus with the filler content has also been reported by other authors19,20 in polymers filled with either alumina or nanosilica. This behavior was correlated to aggregation of silica nanoparticles.…”

Section: Resultsmentioning

confidence: 85%

Nanofilled polyethersulfone as matrix for continuous glass fibers composites: Mechanical properties and solvent resistance

Aurilia¹,

Sorrentino²,

Sanguigno³

et al. 2010

Adv Polym Technol

View full text Add to dashboard Cite

Polyethersulfone (PES) is high performance thermoplastic polymer; however, its applications are limited by the poor resistance to several classes of solvents. Fumed silica and expanded graphite nanoparticles were used to prepare nanofilled PES by a melt-compounding technique with the view to improve the barrier properties. Solvent uptake at equilibrium and solvents resistance of nanofilled PES compounds were investigated by three different methodologies: (1) weight increase by methylene chloride absorption in a vapor-saturated atmosphere, (2) solvent uptake of acetone at equilibrium, and (3) decay of storage modulus induced by acetone diffusion. The storage modulus decay was measured by means of dynamic mechanical analysis on samples immersed in an acetone bath. The collected data were fitted to an ad hoc model to calculate the diffusion coefficient. The produced nanofilled PES showed a significant improvement in barrier properties and considerable reduction in acetone uptake at equilibrium, in comparison with the neat PES. Nanofilled PES compounds were also used to produce continuous glass fiber composites by the film-stacking manufacturing technique. The composites exhibited, by and large, improvements in flexural and shear strength. Their solvent resistance was evaluated by measuring the variation of mechanical properties after exposure to acetone for 1 and 5 days. These tests showed that the composites produced with the nanocomposite matrix did not exhibit higher solvent resistance than those prepared with neat PES, probably because of the deterioration of the fiber/nanocomposite-matrix interfacial bond in the wet state. C

show abstract

Section: Resultsmentioning

confidence: 85%

Nanofilled polyethersulfone as matrix for continuous glass fibers composites: Mechanical properties and solvent resistance

Aurilia¹,

Sorrentino²,

Sanguigno³

et al. 2010

Adv Polym Technol

View full text Add to dashboard Cite

show abstract

“…Thermotropic main-chain liquid crystalline polymers (TLCPs) usually have rigid main chains and good mechanical properties, high chemical and thermal stability, which make TLCPs high performance engineering plastics widely used for electronics, automotive and aerospace applications [1]. The main chains of molten TLCPs align spontaneously for their rigidity [2], and this orientated structure affects the excellent physical and chemical properties of TLCP. In general, such as glass fibers (GFs), or mineral fillers are added to TLCP to improve dimensional stability, thermal properties and processability of neat TLCP.…”

Section: Introductionmentioning

confidence: 99%

Surface Effect of Silica Nano-Particles with Different Size on Thermotropic Liquid Crystalline Polyester Composites

Fukatsu¹,

Kuno²,

Matsuda³

et al. 2014

WJNSE

View full text Add to dashboard Cite

Interface properties of nano-silica/thermotropic liquid crystalline polyesters (TLCP) composites were investigated by X-ray diffraction analysis and differential scanning calorimetory. The crystallinity of TLCP in the composites drastically decreased with an increase of nano-silica content, depending on the surface area of the silica particles. Little size effects (40-400 nm) in the particles and strong interaction between silica surface and the C=O moieties of TLCP were observed by IR analysis. The glass transition temperature of TLCP (<20 nm) in silica surface increased about 20˚C higher than that in bulk.

show abstract

Effect of extrusion screw type on properties of recycled glass fiber reinforced liquid crystalline polymer

Zhang

Tan

Peng³

et al. 2014

Polymer Composites

View full text Add to dashboard Cite

In this work, when glass fiber reinforced liquid crystalline polymer (GFLCP) was subjected to injection molding once, the recycled GFLCP (RGFLCP) including the scraps and unqualified injection products was granulated by different extruders with varying screw configurations. The glass fibers were observed by SEM and their lengths were calculated by mathematical statistics. In the case of the samples prepared by a singlescrew extruder, the average glass fiber length (L) and the percentage of glass fibers whose length was higher than critical length (V j ) gradually decreased with the increase of the screw diameter and the ratio of its length to diameter (L/D). However, a drastic reduction of L and V j was observed for the RGFLCP extruded by a twin-screw extruder. The mechanical, thermal properties, and the shear viscosity of the extruded RGFLCP decreased with the reduction of L and V j . The extruded RGFLCP prepared with a single screw extruder that was featured with 30 mm screw diameter and 30 L/D obtained the excellent properties with a notched impact strength of 103.4 J/m, tensile strength of 110.2 MPa, and flexural strength of 159.3 MPa. Its initial decomposition temperature (T 21% ) and heat distortion temperature were 483.1 C and 256.4 C, respectively.

show abstract

Effect of fumed silica nanoparticles on glass fiber filled thermotropic liquid crystalline polymer composites

Cited by 9 publications

References 43 publications

Nanofilled polyethersulfone as matrix for continuous glass fibers composites: Mechanical properties and solvent resistance

Nanofilled polyethersulfone as matrix for continuous glass fibers composites: Mechanical properties and solvent resistance

Surface Effect of Silica Nano-Particles with Different Size on Thermotropic Liquid Crystalline Polyester Composites

Effect of extrusion screw type on properties of recycled glass fiber reinforced liquid crystalline polymer

Contact Info

Product

Resources

About