Toward Polymeric and Polymer Composites Impeller Fabrication

Impellers are referred to as a core component of turbomachinery. The use of impellers in various applications is considered an integral part of the industry. So, increased performance and the optimization of impellers have been the center of attention of a lot of studies. In this regard, studies have been focused on the improvement of the efficiency of rotary machines through aerodynamic optimization, using high-performance materials and suitable manufacturing processes. As such, the use of polymers and polymer composites due to their lower weight when compared to metals has been the focus of studies. On the other hand, methods of the manufacturing process for polymer and polymer composite impellers such as conventional impeller manufacturing, injection molding and additive manufacturing can offer higher economic efficiency than similar metal parts. In this study, polymeric and polymer composites impellers are discussed and conclusions are drawn according to the manufacturing methods. Studies have shown promising results for the replacement of polymers and polymer composites instead of metals with respect to a suitable temperature range. In general, polymers showed a good ability to fabricate the impellers, however in more difficult working conditions considering the need for a substance with higher physical and mechanical properties necessitates the use of composite polymers. However, in some applications, the use of these materials needs further research and development.

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Study of Transcrystallization in Polymer Composites

MRS Proceedings ◽

10.1557/proc-170-117 ◽

1989 ◽

Vol 170 ◽

Cited By ~ 15

Author(s):

Benjamin S. Hsiao ◽

J. H. Eric

Keyword(s):

Thermal Conductivity ◽

Free Energy ◽

Carbon Fiber ◽

Plasma Treatment ◽

Polymer Composites ◽

High Performance ◽

Interfacial Strength ◽

Fiber Surface ◽

Semicrystalline Polymers ◽

First Case

AbstractTranscrystallization of semicrystalline polymers, such as PEEK, PEKK and PPS, in high performance composites has been investigated. It is found that PPDT aramid fiber and pitch-based carbon fiber induce a transcrystalline interphase in all three polymers, whereas in PAN-based carbon fiber and glass fiber systems, transcrystallization occurs only under specific circumstances. Epitaxy is used to explain the surface-induced transcrystalline interphase in the first case. In the latter case, transcrystallization is probably not due to epitaxy, but may be attributed to the thermal conductivity mismatch. Plasma treatment on the fiber surface showed a negligible effect on inducing transcrystallization, implying that surface-free energy was not important. A microdebonding test was adopted to evaluate the interfacial strength between the fiber and matrix. Our preliminary results did not reveal any effect on the fiber/matrix interfacial strength of transcrystallinity.

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Composites from Thermoplastic Natural Rubber Reinforced Rubberwood Sawdust: Effects of Sawdust Size and Content on Thermal, Physical, and Mechanical Properties

International Journal of Polymer Science ◽

10.1155/2018/7179527 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 5

Author(s):

Chatree Homkhiew ◽

Surasit Rawangwong ◽

Worapong Boonchouytan ◽

Wiriya Thongruang ◽

Thanate Ratanawilai

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Natural Rubber ◽

High Density Polyethylene ◽

High Performance ◽

Physical And Mechanical Properties ◽

Modulus Of Rupture ◽

Shore Hardness ◽

Thermoplastic Natural Rubber ◽

Plastic Content

The aim of this work is to investigate the effects of rubberwood sawdust (RWS) size and content as well as the ratio of natural rubber (NR)/high-density polyethylene (HDPE) blend on properties of RWS reinforced thermoplastic natural rubber (TPNR) composites. The addition of RWS about 30–50 wt% improved the modulus of the rupture and tensile strength of TPNR composites blending with NR/HDPE ratios of 60/40 and 50/50. TPNR composites reinforced with RWS 80 mesh yielded better tensile strength and modulus of rupture than the composites with RWS 40 mesh. The TPNR/RWS composites with larger HDPE content gave higher tensile, flexural, and Shore hardness properties and thermal stability as well as lower water absorption. The TPNR/RWS composites with larger plastic content were therefore suggested for applications requiring high performance of thermal, physical, and mechanical properties.

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Constructing Three-dimensional Nano-crystalline Diamond Network within Polymer Composites for Enhanced Thermal Conductivity

Nanoscale ◽

10.1039/d1nr05481c ◽

2021 ◽

Author(s):

Shaoyang Xiong ◽

Yue Qin ◽

Linhong Li ◽

Guoyong Yang ◽

Maohua Li ◽

...

Keyword(s):

Thermal Conductivity ◽

Polymer Composites ◽

Thermal Performance ◽

Thermal Transport ◽

High Performance ◽

Rapid Development ◽

Electronic Devices ◽

Three Dimensional ◽

Nano Crystalline ◽

Enhanced Thermal Conductivity

In order to meet the requirement of thermal performance with the rapid development of high-performance electronic devices, constructing a three-dimensional thermal transport skeleton is an effective method for enhancing thermal...

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The Effect of the Morphology of Coarse Aggregate on the Properties of Self-Compacting High-Performance Fibre-Reinforced Concrete

Materials ◽

10.3390/ma11081372 ◽

2018 ◽

Vol 11 (8) ◽

pp. 1372 ◽

Cited By ~ 21

Author(s):

Krzysztof Ostrowski ◽

Łukasz Sadowski ◽

Damian Stefaniuk ◽

Daniel Wałach ◽

Tomasz Gawenda ◽

...

Keyword(s):

Reinforced Concrete ◽

High Performance ◽

Coarse Aggregate ◽

Fresh Concrete ◽

Physical And Mechanical Properties ◽

Concrete Mixture ◽

Rheological Parameters ◽

Transverse Strain ◽

Fibre Reinforced Concrete ◽

High Performance Fibre

When understanding the effect of the morphology of coarse aggregate on the properties of a fresh concrete mixture, the strength and deformability of self-compacting high-performance fibre-reinforced concrete (SCHPFRC) can be seen to be critical for its performance. In this research, regular and irregular grains were separated from granite coarse aggregate. The morphology of these grains was described while using digital image analysis. As a result, the aspect ratio, roundness and area ratio were determined in order to better understand this phenomenon. Then, the principal rheological, physical, and mechanical properties of SCHPFRC were determined. The obtained results indicated that the morphology of the grains of coarse aggregate has an impact on the strength and stiffness properties of SCHPFRC. Moreover, significant differences in the transverse strain of concretes were observed. The morphology of the coarse aggregate also has an impact on the rheological parameters of a fresh concrete mixture. To better understand this phenomenon, the hypothesized mechanism of the formation of SCHPFRC caused by different morphology of coarse aggregate was proposed at the end of the article.

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A Detailed Review on Structure and Properties of High Performance Carbon Nanotube/Polymer Composites

Physical Chemistry Research for Engineering and Applied Sciences, Volume Three ◽

10.1201/b18297-21 ◽

2015 ◽

pp. 211-264

Keyword(s):

Carbon Nanotube ◽

Polymer Composites ◽

High Performance ◽

Structure And Properties ◽

Detailed Review

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Preparation of Submicrometer High-Performance Poly(ether imide) Particles for Fabricating Carbon Fiber Reinforced Polymer Composites

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.8b02930 ◽

2018 ◽

Author(s):

Rui Zhang ◽

Jacob J. Fallon ◽

Ronald M. Joseph ◽

Jessica A. Thomas ◽

Maryam S. Hassan ◽

...

Keyword(s):

Carbon Fiber ◽

Polymer Composites ◽

High Performance ◽

Fiber Reinforced Polymer ◽

Carbon Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Reinforced Polymer ◽

Fiber Reinforced Polymer Composites ◽

Carbon Fiber Reinforced

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High-Performance Thermal Management Nanocomposites: Silver Functionalized Graphene Nanosheets and Multiwalled Carbon Nanotube

Crystals ◽

10.3390/cryst8110398 ◽

2018 ◽

Vol 8 (11) ◽

pp. 398 ◽

Cited By ~ 4

Author(s):

Yongcun Zhou ◽

Xiao Zhuang ◽

Feixiang Wu ◽

Feng Liu

Keyword(s):

Thermal Conductivity ◽

Carbon Nanotube ◽

Polymer Composites ◽

Thermal Management ◽

High Performance ◽

Graphene Nanosheets ◽

Multiwalled Carbon Nanotube ◽

Processing Unit ◽

Functionalized Graphene ◽

Multiwalled Carbon

Polymer composites with high thermal conductivity have a great potential for applications in modern electronics due to their low cost, easy process, and stable physical and chemical properties. Nevertheless, most polymer composites commonly possess unsatisfactory thermal conductivity, primarily because of the high interfacial thermal resistance between inorganic fillers. Herein, we developed a novel method through silver functionalized graphene nanosheets (GNS) and multiwalled carbon nanotube (MWCNT) composites with excellent thermal properties to meet the requirements of thermal management. The effects of composites on interfacial structure and properties of the composites were identified, and the microstructures and properties of the composites were studied as a function of the volume fraction of fillers. An ultrahigh thermal conductivity of 12.3 W/mK for polymer matrix composites was obtained, which is an approximate enhancement of 69.1 times compared to the polyvinyl alcohol (PVA) matrix. Moreover, these composites showed more competitive thermal conductivities compared to untreated fillers/PVA composites applied to the desktop central processing unit, making these composites a high-performance alternative to be used for thermal management.

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Powder Injection Molding of Ti-6Al-4V Alloy for Defect-Free High Performance Titanium Parts with Low Carbon/Oxygen Contents

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.770.189 ◽

2018 ◽

Vol 770 ◽

pp. 189-194

Author(s):

Dong Guo Lin ◽

Jae Man Park ◽

Tae Gon Kang ◽

Seong Taek Chung ◽

Young Sam Kwon ◽

...

Keyword(s):

Injection Molding ◽

Alloy Powder ◽

High Performance ◽

Physical And Mechanical Properties ◽

Powder Injection Molding ◽

Powder Injection ◽

Solid Loading ◽

Injection Molding Process ◽

Low Carbon ◽

Molding Process

In this work, powder injection molding (PIM) of Ti-6Al-4V alloy powder has been studied. Defect-free high performance Ti-6Al-4V parts with low carbon/oxygen contents have been successfully prepared by PIM. A pre-alloyed Ti-6Al-4V alloy powder and wax-polymer binder system have been mixed together to prepare the feedstock. In mixing stage, the solid loading percentage and mixing conditions have been optimized. Rheological and thermal debinding behaviors of prepared feedstock have been characterized and numerically expressed based on rheometry and thermal gravity experimental results. In addition, the injection molding process of Ti-6Al-4V parts has been numerically analyzed to optimize the injection molding conditions. Consequently, the defect-free Ti-6Al-4V parts with low carbon and oxygen contents have been successfully fabricated by PIM, which exhibits excellent physical and mechanical properties.

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