Influence of Concentration of Carbon and Glass Fibers, Melt Viscosity, and Number of Extrusions on the Porosity of Composites Based on Polyphenylene Sulphone, Polyethyrimide and Polyphenylene Sulfide

2020 ◽  
Vol 869 ◽  
pp. 481-487
Author(s):  
Ismel V. Musov ◽  
Azamat L. Slonov ◽  
Azamat Zhansitov ◽  
Diana M. Khakulova ◽  
Svetlana Yu. Khashirova
Keyword(s):  
Comparative Analysis ◽  
Pore Formation ◽  
Filler Content ◽  
Glass Fibers ◽  
Polyphenylene Sulfide ◽  
Filler Concentration ◽  
Melt Viscosity ◽  
Fibrous Fillers

A comparative analysis of the effect on the porosity of composite filaments based on polyphenylene sulfone, polyetherimide and polyphenylene sulfide with discrete fibrous fillers, such factors as the filler concentration, melt viscosity and number of extrusion passes, was carried out. It is shown that with increasing filler content and decreasing melt viscosity, the porosity of composite filaments enhances. Upon repeated extrusion carbon-filled composites, a decrease in porosity is observed, however for glass-filled samples an increase in porosity is occurred. A comparative analysis showed that the filament samples based on polyetherimide have a higher porosity. The most resistant to pore formation are polyphenylene sulfone-based samples.

Investigation of the Effect of the Length and Content of Carbon Fibers on the Properties of Polyphenylene Sulfide

2020 ◽  
Vol 869 ◽  
pp. 474-480
Author(s):  
Azamat L. Slonov ◽  
Ismel V. Musov ◽  
Elena V. Rzhevskaya ◽  
Azamat Zhansitov ◽  
Svetlana Yu. Khashirova
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Heat Resistance ◽  
Carbon Fibers ◽  
Filler Content ◽  
Sharp Decrease ◽  
Polyphenylene Sulfide ◽  
Average Particle ◽  
Melt Flow Rate ◽  
Particle Length

The article presents the results of a study of the effect of milled and chopped carbon fibers, with an average particle length of 0.2 and , respectively, on the mechanical properties of polyphenylene sulfide and its heat resistance. It was found that the introduction of carbon fibers leads to a significant decrease in the melt flow rate. It was shown that after a sharp decrease in impact strength at 10 % content of carbon fibers, its inverse improvement occurs with an increase in the filler content. Composites containing carbon fibers with length demonstrate higher impact strength. The introduction of a filler leads to a significant increase in the elastic modulus and strength of polyphenylene sulfide and its heat resistance.

scholarly journals The effect of additives metal on the D.C conductivity of epoxy resin

2011 ◽  
Vol 8 (1) ◽  
pp. 168-174
Author(s):  
Baghdad Science Journal
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Epoxy Resin ◽  
Filler Content ◽  
Experimental Results ◽  
Filler Concentration ◽  
Effect Of Additives

The present studies are focused on the modification of the properties of epoxy resin with different additives namely aluminum, copper by preparing of composites systems with percentage (20%, 40% and 50%) of the above additives. The experimental results show that the D.C of conductivity on wt% filler content at ( 293-413 ) K electrical conductivity of all above composites increased with temperature for composites with filler contact and find the excellent electrical conductivity of copper and lie between (2.6*10-10 - 2.1*10-10)?.cm . The activation energy of the electrical conductivity is determined and found to decrease with increasing the filler concentration.

Nanofiller-Polymer Interactions At and Above the Glass Transition Temperature

2000 ◽  
Vol 661 ◽  
Author(s):  
Ai-jun Zhu ◽  
Sanford S. Sternstein
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Strain Amplitude ◽  
Filler Content ◽  
Loss Modulus ◽  
Surface Treatments ◽  
Filler Concentration ◽  
Large Strains ◽  
Chain Entanglement

ABSTRACTRheological data are reported for a series of fumed silica filled PVAc samples, using fillers of different specific surface areas and surface treatments. Data at the glass transition temperature and 45 C above Tg are presented. The addition of filler systematically increases Tg, and all samples obey time-temperature superposition. However, temperature normalized and frequency normalized plots of loss modulus indicate that there is no change in the dispersion of the glass transition, with the only exception being a surface modified with covalently bonded polymer chains. Thus, contrary to expectations, an increase in filler content or change in surface treatment has no effect on the relative shape of the relaxation time spectrum at the glass transition. At 45 C above Tg, different behavior is observed. The filler concentration has a major effect on the nonlinearity of dynamic moduli vs. strain amplitude, with higher filler content reducing the strain amplitude at which nonlinear behavior is observed. Specific filler surface treatments result in major changes in the shape of the loss factor versus strain amplitude relationship. These results suggest that interfacial interactions strongly modify the far-field polymer behavior with respect to chain entanglement slippage at large strains.

Rheological and mechanical properties of polyphenylene sulfide reinforced with round and rectangle cross-section glass fibers

2016 ◽  
Vol 29 (7) ◽  
pp. 849-856
Author(s):  
Tao Jiang ◽  
Chengzhen Geng ◽  
Hanmei Zhou ◽  
Ai Lu
Keyword(s):  
Mechanical Properties ◽  
Cross Section ◽  
Glass Fibers ◽  
Polyphenylene Sulfide ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Reinforcing Effect ◽  
Fiber Cross Section ◽  
Cross Section Shape ◽  
Section Shape

Two kinds of glass fibers with round (RdGF) and rectangle cross-sections (RcGF) were used to reinforce polyphenylene sulfide (PPS), respectively. In this way, the effect of fiber cross-section shape on rheological and mechanical properties of the composites was studied for the first time. Results showed that the viscosity of the composites reinforced with RcGF was much lower than that of RdGF composites, owing to their higher sensitivity to flow. As a result, PPS/RcGF composites could be injection-molded at high fiber contents. Moreover, RcGF showed a better reinforcing effect on mechanical properties of PPS. So the use of RcGF could better balance the contradiction between processability and reinforcing effect for glass fiber-reinforced composites. Various characterizations were carried out to reveal the reinforcing mechanism. This work demonstrated the importance of fiber cross-section shape on design and production of fiber-reinforced composites.

scholarly journals Aging of Polyphenylene Sulfide-Glass Composite and Polysulfone in Highly Oxidative and Strong Alkaline Environments

2020 ◽  
Vol 7 ◽  
Author(s):  
X. X. Zheng ◽  
A. J. Böttger ◽  
K. M. B. Jansen ◽  
J. van Turnhout ◽  
J. van Kranendonk
Keyword(s):  
Glass Fibers ◽  
Water Electrolysis ◽  
Polyphenylene Sulfide ◽  
Raw Material ◽  
Chemical Degradation ◽  
Pure Oxygen ◽  
Creep Recovery ◽  
Alkaline Water Electrolysis ◽  
Alkaline Environments ◽  
Alkaline Electrolysis

Alkaline water electrolysis becomes increasingly important for the supply of renewable energy, and of raw material for the chemical industry. An attractive choice for the encapsulation of the electrolyte cell is an (advanced) engineering polymer. The objective of this paper is to find a suitable one that can withstand for many years: 30 wt% KOH solution and pure oxygen at a high pressure of 50 bar and at an elevated temperature of 90°C. Using CES EduPack, 12 possible thermoplastic polymers were selected, of which polyphenylene sulfide (PPS) and polysulfone (PSU) were further investigated using accelerated testing. The polymers have been exposed to three KOH concentrations (15, 30 and 45 wt%), two oxygen pressures (pure O2 at 5 bar and air with pO2 = 20%), and three temperatures (90°C, 120°C, and 170°C). Extensive characterization of the exposed samples has been carried out using various techniques, including weight, tensile, DMA, and creep-recovery measurements, as well as DSC, FTIR, XRD and SEM. After 12 weeks of aging, glass fiber reinforced PPS failed in a strong alkaline solution at high temperatures, due to the dissolution of the glass fibers. The PPS matrix itself and PSU turned out to be resistant to thermo-oxidative and chemical degradation under the conditions tested. Only marginal changes in mechanical, visco-elastic and thermal behavior were observed, which can be ascribed to physical rather than chemical aging. In view of the brittle nature of PPS, it could be concluded that PSU is the most promising candidate for the long-term application in alkaline electrolysis. Extrapolating the data using time-temperature superposition, it is predicted that PSU will retain its integrity and mechanical properties for a period of 20 years of operation.

scholarly journals Comparative analysis of crystallization behavior induced by different mineral fillers in polypropylene nanocomposites

2020 ◽  
Vol 10 ◽  
pp. 184798042092275
Author(s):  
Luciana A. Castillo ◽  
Silvia E. Barbosa
Keyword(s):  
Thermal Properties ◽  
Comparative Analysis ◽  
Crystallization Behavior ◽  
Morphological Changes ◽  
Filler Concentration ◽  
Mineral Particle ◽  
Scanning Calorimetry ◽  
Crystalline Phases ◽  
Polypropylene Nanocomposites ◽  
Mineral Fillers

A comparative analysis of crystallization behavior induced by several mineral fillers in polypropylene nanocomposites was performed. Morphological changes and thermal properties of nanocomposites were evaluated, considering the influence of shape, crystalline morphology, and concentration of mineral particles. For this study, hydrated magnesium silicates with different particle morphologies, such as platelets (talc) and fibers (sepiolite), were used for nanocomposites. In addition, to analyze the effect of mineral crystallinity on nanocomposites, talc and sepiolite from different origin and genesis were selected. Nanocomposites were compounded and injection molded, using different filler concentration (0, 1, and 3% w/w) for each mineral particle. To evaluate the particle influence on nanocomposite crystallinity, X-ray diffraction was used to determine crystalline phases and crystal orientation, meanwhile differential scanning calorimetry was performed to obtain thermal properties. Main results revealed that talc has a higher nucleating effect on polypropylene matrix than sepiolite fibers, regardless of their origin and genesis. Meanwhile, a transcrystalline layer that surrounds the fiber surface is observed for nanocomposite containing sepiolite. Moreover, Argentinean talc induces different crystalline phases in nanocomposite with respect to Australian one, which partly influences on mechanical properties.

Tribological and Mechanical Properties of Carbon Nanofiber-Filled PTFE Composites

2007 ◽  
Vol 121-123 ◽  
pp. 975-978
Author(s):  
Yi Jun Shi ◽  
Xin Feng ◽  
X.S. Diao ◽  
Huai Yuan Wang ◽  
Xiao Hua Lu
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanofiber ◽  
Adhesive Wear ◽  
Filler Content ◽  
Filler Concentration ◽  
Wear Volume ◽  
Wear Property ◽  
Wear Properties ◽  
Ptfe Composites ◽  
Worn Surfaces

The tribological and mechanical properties of carbon nanofiber (CNF)-filled polytetrafluoroethylene (PTFE) composites with different filler proportions were studied. The worn surfaces of PTFE and carbon nanofiber/PTFE (CNF/PTFE) composites were then examined with scanning electron microscope (SEM). The results show the friction properties of CNF/PTFE composites decreased then increased with the increasing content of CNFs, while the anti-wear properties of CNF/PTFE composites were much higher than that of pure PTFE. The best anti-wear property was obtained with the composite containing 2 wt.% CNFs. The wear volume loss of the composite contained 2 wt.% CNFs was only about 1/700 that of PTFE without CNFs under the condition of 150N and 1.4m/s. Meanwhile, the results also indicate that the mechanical properties of CNF/PTFE composites increased then decreased with the increasing filler concentration, and the composite contained 1 wt.% CNFs has the best mechanical properties. Compare to pure PTFE, the tensile strength and the elongation of CNF/PTFE composites increased about 20% and 70% respectively when the filler content is 1 wt.%. It was seen from the worn surfaces micrographs of PTFE and CNF/PTFE composites that CNFs greatly reduce the adhesive wear of PTFE.

Investigation of the Influence of Linear Dimensions and Concentration of Carbon and Glass Fibers on the Properties of Polyetherimide

2019 ◽  
Vol 816 ◽  
pp. 48-54
Author(s):  
Azamat L. Slonov ◽  
Ismel V. Musov ◽  
Azamat Zhansitov ◽  
D.M. Khakulova ◽  
Elena V. Rzhevskaya ◽  
...  
Keyword(s):  
Heat Resistance ◽  
Glass Fibers ◽  
Melt Flow Index ◽  
Strength Properties ◽  
Flow Index ◽  
Melt Flow ◽  
Linear Dimensions ◽  
Slight Advantage ◽  
Fibrous Fillers

The effect of glass (GF) and carbon (CF) fibers of various linear sizes (0.2 and 3 mm) and concentrations on the properties of polyetherimide (PEI) has been studied. It is shown that the introduction of fibrous fillers leads to a decrease in the melt flow index, and to a greater extent in the case of fibers with a length of 3 mm. Also, it was found that both GF and CF lead to a decrease in toughness and an increase in the elastic-strength properties with a slight advantage of composites containing fibers of a length of 3 mm. In this case, GF composites have significantly higher properties. The study of heat resistance shows a slight decrease for composites with CF and the absence of influence of the filler for composites with HC, regardless of the size of the fibers.

The Influence of Alumina Filler on Mechanical, Thermal and Electrical Properties of Bulk Moulding Compounds (BMCs) Composite

2019 ◽  
Vol 889 ◽  
pp. 65-70
Author(s):  
Thai Hung Le ◽  
Hien Trang Nguyen
Keyword(s):  
Composite Materials ◽  
Electrical Properties ◽  
Filler Content ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Circuit Breaker ◽  
Short Glass Fiber ◽  
Thermal And Electrical Properties ◽  
Different Content ◽  
Short Glass

Bulk moulding compounds (BMCs) are composite materials of thermosetting polymer matrix reinforced by short glass fibers. BMCs have known as the alternative of the traditional materials thanks to their optimal properties such as lightweight, durability, corrosion under certain environment, formable, high electrical resistance... The previous study mentioned the process of manufacturing composite materials BMCs from unsaturated polyester resin reinforced with short glass fiber and CaCO3 filler by Z axis mixer and applying in the circuit breaker bottom, [1, 2]. To improve the thermal resistance of BMCs under high temperature condition in the industry, in this research, alumina filler was added to investigate the influence of alumina with the different content of 15wt.% and 20wt.% on the mechanical, thermal and electrical properties of BMCs. Specimens manufactured with and without alumina filler content were compared. The results show clearly that adding alumina could improve the thermal properties whereas this might decrease the tensile strength of BMCs. The experimental results also indicated the influence of mass fraction of alumina filler content on properties of BMCs.

scholarly journals Reversible and Irreversible Color Change during Photo and Thermal Degradation of PolyphenyleneSulfide Composite

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1579 ◽  
Author(s):  
Victor B. Ivanov ◽  
Vladimir V. Bitt ◽  
Elena V. Solina ◽  
Alexander V. Samoryadov
Keyword(s):  
Visible Light ◽  
Color Change ◽  
Glass Fibers ◽  
Spectral Composition ◽  
Polyphenylene Sulfide ◽  
Reflection Spectra ◽  
Total Radiation ◽  
Arrhenius Law ◽  
High Level ◽  
Short Glass

The effect of the light spectral composition and temperature on the change of color characteristics and reflection spectra during the irradiation of polyphenylene sulfide reinforced by short glass fibers in the SUNTEST apparatus was analyzed. The scales of reversible color change upon successive exposure to total radiation corresponding to the sunlight spectrum and to visible light wereevaluated and the possible mechanisms for the observed effects are discussed. The features of the color change upon visible light irradiation of previously thermally aged samples wereconsidered. Possible causes for deviation from the Arrhenius law during thermal aging of the composite are discussed. It wasdemonstrated that even with a significant change in color, the physicomechanical and electrotechnical characteristics of the composite only changedslightly or remained virtually at the same high level.

Sign in / Sign up

Export Citation Format

Share Document