Novel low-cost hybrid composites from asphaltene/SBS tri-block copolymer with improved thermal and mechanical properties

2015 ◽  
Vol 51 (5) ◽  
pp. 2394-2403 ◽  
Author(s):  
Hongchao Wu ◽  
Vijay Kumar Thakur ◽  
Michael R. Kessler
Keyword(s):  
Mechanical Properties ◽  
Block Copolymer ◽  
Hybrid Composites ◽  
Low Cost ◽  
Thermal And Mechanical Properties

Rice Husk Reinforcement in Polymer Composites

2016 ◽  
pp. 165-191
Author(s):  
Sanjay Sharma ◽  
Deepak Verma
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Low Cost ◽  
Petroleum Products ◽  
Natural Fibre ◽  
Low Density ◽  
Thermal And Mechanical Properties ◽  
Coconut Husk ◽  
Fibre Composites ◽  
Petroleum Reserves

Increasing concern about global warming and depleting petroleum reserves and the high cost of petroleum products had made scientists to focus more on the use of natural fibres such as rice husk, baggase, coconut husk, hemp, sisal, jute, flax, banana etc. Past decade has shown many efforts to develop composites to replace the Petroleum and other non-decaying material products. Reinforcement with natural fibre in composites has recently gained attention due to low cost, easy availability, low density, acceptable, strength full, stiffness, ease of separation, enhanced energy recovery, biodegradability and recyclable in nature. Natural fibre composites are suitable as wood substitutes in the construction sector. All these have excellent physical, thermal and mechanical properties and can be utilized more effectively in the development of composite materials. In this connection, an investigation has been carried using rice husk, a natural fibre abundantly available in India.

CHLOROHYDRINATION OF NR LATEX BY USING SODIUM HYPOCHLORITE FOR FUEL-RESISTANT MATERIALS

2016 ◽  
Vol 89 (2) ◽  
pp. 251-261 ◽  
Author(s):  
T. Chanroj ◽  
P. Paoprasert
Keyword(s):  
Mechanical Properties ◽  
Sodium Hypochlorite ◽  
Surfactant Concentration ◽  
Raw Materials ◽  
Low Cost ◽  
Scaling Up ◽  
Hydrochloric Acid Concentration ◽  
Thermal And Mechanical Properties ◽  
Simple Method ◽  
Production Processes

ABSTRACT NR is hydrophobic and cannot be used to store, transfer, or make contact with hydrocarbon compounds. We report a simple method to increase the hydrophilicity of NR: a chlorohydrination reaction of NR latex by using sodium hypochlorite is described. It was found that only chlorohydrinated NR was obtained and side products were unnoticeable. The effects of sodium hypochlorite concentration, hydrochloric acid concentration, surfactant concentration, and reaction time on chlorohydrin content in NR were investigated. The swelling resistance of chlorohydrinated NR with 11% chlorohydrin content in diesel and gasohol fuels was improved nearly 3-fold and 4-fold, respectively, compared to that of the unmodified NR. The thermal and mechanical properties of the chlorohydrinated NR were characterized and found to be similar to those of pristine NR, indicating that the chlorohydrinated NR can be an excellent substitute for NR. This method has merits such as low cost of raw materials, easier and greener production processes than traditional methods, and scaling-up possibilities for the fabrication of chlorohydrinated NR for a variety of applications.

The evaluation of the thermal and mechanical properties of aramid/semi-carbon fibers hybrid composites

2017 ◽  
Vol 18 (2) ◽  
pp. 296-302 ◽  
Author(s):  
Hossein Ebrahimnezhad-Khaljiri ◽  
Reza Eslami-Farsani ◽  
Kousha Abbas Banaie
Keyword(s):  
Mechanical Properties ◽  
Carbon Fibers ◽  
Hybrid Composites ◽  
Thermal And Mechanical Properties

Thermal and Mechanical Properties of Epoxy Resin Functionalized Copper and Graphene Hybrids using In-situ Polymerization Method

2020 ◽  
Vol 16 ◽  
Author(s):  
Nadia A. Ali ◽  
Alaa M. Abd-Elnaiem ◽  
Seenaa I. Hussein ◽  
Asmaa Sh. Khalil ◽  
Hatem R. Alamri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Wear Resistance ◽  
Epoxy Resin ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Weight Ratio ◽  
Epoxy Composites ◽  
Thermal And Mechanical Properties ◽  
Maximum Hardness

Objective: In this work, graphene (Gr) or/and Cu particles are used to improve the thermal and mechanical properties of epoxy resin. Methods: Various contents of Gr powder (0.1, 0.3, and 0.5 wt%), Cu powder (10, 30, and 50 wt%) were loaded to epoxy to form Gr/epoxy and Cu/epoxy composites, respectively. In addition, hybrids epoxy/Cu/Gr samples were prepared with a selection of lowest (0.1 and 10) and highest (0.5 and 50) ratios of Gr, and Cu, respectively. Results: The thermal conductivity increases with the increasing weight ratio of Gr and Cu as compared to the pure epoxy. The Thermogravimetric analysis (TGA) of epoxy composites and hybrid composites reveals an improvement in the thermal stability. In addition, the mechanical properties such as hardness shore D and the wear resistance are enhanced for both the epoxy composites and hybrids composites. However, the Ep+0.5wt%Gr+50wt%Cu hybrid composite has the maximum hardness 84, thermal conductivity of 3.84 W/m.K, it shows the lowest wear resistance 2.7×10-6 mm3/Nm at loading 10 N. Conclusion: The hybrid composite containing 0.5wt%Gr and 50wt%Cu shows the maximum hardness and thermal conductivity, as well as the lowest wear resistance when compared to other composites. The physical properties of the hybrid composite can be controlled by the host blend, and hence the morphology, and interfacial characteristics.

Preparation, thermal and mechanical properties of POSS epoxy hybrid composites

2007 ◽  
Vol 104 (4) ◽  
pp. 2113-2121 ◽  
Author(s):  
Fei Xiao ◽  
Yangyang Sun ◽  
Yonghao Xiu ◽  
C. P. Wong
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composites ◽  
Thermal And Mechanical Properties

scholarly journals Preparation of Linear Low-density Polyethylene/Treated Date Palm Leaflet Green Composites and Investigation of their Thermal and Mechanical Properties

2019 ◽  
Vol 35 (1) ◽  
pp. 200-206
Author(s):  
Mashael Alshabanat
Keyword(s):  
Mechanical Properties ◽  
Tensile Testing ◽  
Date Palm ◽  
Low Cost ◽  
Gum Arabic ◽  
Renewable Resource ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Thermal And Mechanical Properties ◽  
Linear Low Density Polyethylene

This work aims to develop green linear low-density polyethylene (LLDPE) composites that are commercially viable due to the low cost of the date palm leaflet filler, which is a local renewable resource. The filler was naturally treated with gum arabic solution. FT-IR, XRD, and SEM techniques were used to characterize the samples. The thermal and mechanical properties were measured by TGA, DSC, and tensile testing. The results showed noticeable changes in the properties of the composites compared to those of the original LLDPE sample. TGA revealed that the composite started thermally. The composites started thermally degrading before the original polymer, owing to the degradation of the natural components in the filler. The findings from DSC suggested that the crystallinity was affected. The tensile testing results indicated that the composites were appropriate for applications requiring low tensile strength at break and high Young’s modulus. A comparison of these results with earlier ones exhibited that the basic additives in the polymer may have an effect on the filler performance.

scholarly journals Nanoscale Mapping of Thermal and Mechanical Properties of Bare and Metal-Covered Self-Assembled Block Copolymer Thin Films

2019 ◽  
Vol 2 (2) ◽  
pp. 487-496 ◽  
Author(s):  
Alexandros El Sachat ◽  
Jean Spièce ◽  
Charalambos Evangeli ◽  
Alexander James Robson ◽  
Martin Kreuzer ◽  
...  
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Block Copolymer ◽  
Thermal And Mechanical Properties ◽  
Self Assembled
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