THE EFFECTS OF KENAF FIBER LOADING REINFORCED POLYPROPYLENE AND NANOCLAY

2015 ◽  
Vol 76 (3) ◽  
Author(s):  
Nur Kamarliah Kamardin ◽  
Yakub Md Taib ◽  
Anizah Kalam
Keyword(s):  
Hybrid Composites ◽  
Weight Fraction ◽  
Microscopic Technique ◽  
Screw Extruder ◽  
Electron Microscopic ◽  
Kenaf Fiber ◽  
Electron Microscopic Technique ◽  
Scanning Electron Microscopic ◽  
Twin Screw ◽  
Injection Molded

The mechanical properties of hybrid composites which consists of polypropylene (PP), nanoclay (NC) and kenaf fiber (K) have been investigated. The size of kenaf fiber used was limited to 250-160µm with constant 6phr of NC. In this research, the K, PP and NC were blended in a twin screw extruder and then injection molded with the fiber weight fraction varying between 20-40wt%. The hybrid composited denoted as KPPNC specimens were tested using tensile and izod test according to ASTM D638 and ASTM D256. The consolidation of kenaf fiber into polymer matrix reduced the tensile and impact properties of the composites. The fractured surfaces of impact KPPNC composites were observed using the scanning electron microscopic technique.

scholarly journals Preparation and Properties of Thermoplastic Starch/Bentonite Nanocomposites

2017 ◽  
Vol 885 ◽  
pp. 129-134 ◽  
Author(s):  
László Lendvai ◽  
Ákos Kmetty ◽  
József Karger-Kocsis
Keyword(s):  
Thermoplastic Starch ◽  
Test Results ◽  
Maize Starch ◽  
Screw Extruder ◽  
Electron Microscopic ◽  
Sem Images ◽  
Scanning Electron Microscopic ◽  
Twin Screw ◽  
Thermal Stability Of ◽  
Scanning Electron

Thermoplastic starch (TPS)/bentonite nanocomposites containing up to 7.5 wt.% bentonite were prepared. Maize starch was plasticized with glycerol and water, in presence or absence of bentonite, in a twin-screw extruder. Mechanical, morphological and thermal properties of the TPS/bentonite nanocomposites were determined and discussed. Scanning electron microscopic (SEM) images revealed a good dispersion of bentonite particles with some remaining agglomerates in the range of 0.1 to 1.5 μm. According to the tensile test results the tensile strength and Young’s modulus increased significantly with increasing bentonite content, however, at cost of elongation. Thermogravimetric analysis (TGA) showed that the presence of bentonite exerted little to no effect on the thermal stability of TPS.

Heat distortion temperature of PPS/PC blend, PPS/PC nanocomposite and PPS/PC/GF hybrid nanocomposite

2013 ◽  
Vol 33 (6) ◽  
pp. 483-488 ◽  
Author(s):  
Ji-Zhao Liang
Keyword(s):  
Calcium Carbonate ◽  
Hybrid Composites ◽  
Particle Surface ◽  
Weight Fraction ◽  
Polyphenylene Sulfide ◽  
Hybrid Nanocomposite ◽  
Screw Extruder ◽  
Ternary Composite ◽  
Heat Distortion Temperature ◽  
Twin Screw

Abstract The polyphenylene sulfide (PPS) blended with polycarbonate (PC), reinforced glass fiber (GF) and nanometer calcium carbonate (nano-CaCO3) filled PPS ternary composite, as well as the PPS/PC/GF/nano-CaCO3 hybrid composite, were prepared by means of a twin-screw extruder, and the heat distortion temperature (Td) of these materials was measured to identify the influence of the PC and nano-CaCO3 content on the heatproof properties. The Td values for the PPS/PC blend were lower than that of the neat PPS, when the PC weight fraction (φPC) was less than 20%, and increased with increase in φPC. The Td values for the PPS/GF/nano-CaCO3 ternary composite, on which the particle surface was treated with a titanate coupler, were higher than that of the composite with the particle surface treated with a stearate coupler. When the nano-CaCO3 weight fraction (φf) was less than 6%, the Td values for the PPS/PC/GF/nano-CaCO3 hybrid composites increased with increasing φf; at greater than the maximum of 6%, Td decreased. There was a certain synergistic effect of the GF and nano-CaCO3 on the heatproof properties in the PPS/PC composite.

Review of Notacanthella Jacobus & McCafferty, 2008 (Ephemeroptera: Ephemerellidae) in Thailand, with the redescription of Notacanthella commodema (Allen, 1971)

Zootaxa ◽  
2020 ◽  
Vol 4731 (3) ◽  
pp. 414-424 ◽  
Author(s):  
CHONLAKRAN AUYCHINDA ◽  
MICHEL SARTORI ◽  
BOONSATIEN BOONSOONG
Keyword(s):  
Microscopic Technique ◽  
Electron Microscopic ◽  
Electron Microscopic Technique ◽  
Scanning Electron Microscopic ◽  
Thoracic And Abdominal ◽  
First Time ◽  
Scanning Electron

Larvae of the Notacanthella Jacobus & McCafferty, 2008 species N. commodema (Allen, 1971) and N. quadrata (Kluge & Zhou, 2004) from Thailand are compared and redescribed. Both species have serrations on maxillary canines, as does N. perculta (Allen, 1971) from Vietnam, and this contributes to synonymizing the subgenus Samiocca Jacobus & McCafferty, 2008 under Notacanthella s.s. (= Samiocca n. syn.). The Thailand species can be differentiated by the numbers of thoracic and abdominal tubercles. In addition, the chorionic structure of N. quadrata is investigated for the first time by scanning electron microscopic technique. 

Determination of the phase structure of polymerblends by electron microscopy

1978 ◽  
Vol 36 (1) ◽  
pp. 492-493
Author(s):  
Dr. G. Kaemof
Keyword(s):  
Screw Extruder ◽  
Electron Microscopic ◽  
Thin Sections ◽  
Single Screw Extruder ◽  
Transmission Electron ◽  
The Matrix ◽  
Twin Screw ◽  
Special Case ◽  
Microscopic Investigations

A mixture of polycarbonate (PC) and styrene-acrylonitrile-copolymer (SAN) represents a very good example for the efficiency of electron microscopic investigations concerning the determination of optimum production procedures for high grade product properties.The following parameters have been varied:components of charge (PC : SAN 50 : 50, 60 : 40, 70 : 30), kind of compounding machine (single screw extruder, twin screw extruder, discontinuous kneader), mass-temperature (lowest and highest possible temperature).The transmission electron microscopic investigations (TEM) were carried out on ultra thin sections, the PC-phase of which was selectively etched by triethylamine.The phase transition (matrix to disperse phase) does not occur - as might be expected - at a PC to SAN ratio of 50 : 50, but at a ratio of 65 : 35. Our results show that the matrix is preferably formed by the components with the lower melting viscosity (in this special case SAN), even at concentrations of less than 50 %.

scholarly journals Biferrocenyl Schiff bases as efficient corrosion inhibitors for an aluminium alloy in HCl solution: a combined experimental and theoretical study

RSC Advances ◽  
2020 ◽  
Vol 10 (13) ◽  
pp. 7585-7599 ◽  
Author(s):  
Uzma Nazir ◽  
Zareen Akhter ◽  
Naveed Kausar Janjua ◽  
Muhammad Adeel Asghar ◽  
Sehrish Kanwal ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Theoretical Study ◽  
Electrochemical Impedance ◽  
Electron Microscopic ◽  
Loss Analysis ◽  
Tafel Polarization ◽  
Electron Microscopic Technique ◽  
Scanning Electron Microscopic ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

The anticorrosion activity of biferrocenyl Schiff bases on AA2219-T6 in acidic medium were studied using Tafel polarization, electrochemical impedance spectroscopy, weight loss analysis, FT-IR spectroscopy and scanning electron microscopic technique.

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