INNOVATIVE MANUFACTURING OF CARBON NANOTUBE-LOADED FIBRILLAR POLYMER COMPOSITES

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2459-2465 ◽  
Author(s):  
R. J. T. LIN ◽  
D. BHATTACHARYYA ◽  
S. FAKIROV
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Polymer Composites ◽  
Polyamide 66 ◽  
Screw Extruder ◽  
Enhancing Effect ◽  
The Matrix ◽  
Twin Screw ◽  
New Type ◽  
Scanning Electron

The concept of microfibrillar composite (MFC) has been used to create a new type of polymer composites, in which the reinforcing microfibrils are loaded with carbon nanotubes (CNT). Polyamide 66 (PA66) has been melt blended with polypropylene in a twin screw extruder with and without CNT, and thereafter cold drawn to create a fibrillar state as well as to align the CNT in the PA66 microfibrils. The drawn bristles were compression moulded at 180°C to prepare MFC plates. The scanning electron microscope (SEM) observations indicate near perfect distribution of CNT in the reinforcing PA66 microfibrils. Although the fibrillated PA66 is able to improve the tensile stiffness and strength as expected from the MFC structure, the incorporation of CNT does not exhibit any further enhancing effect. It rather adversely affects the mechanical properties due to poor interface adhesion between the matrix and the reinforcing microfibrils with the presence of CNT, as demonstrated by SEM. However, the resulting highly aligned CNT within the MFC are expected to affect the physical and functional properties of these composites.

scholarly journals Multiwalled Carbon Nanotubes Reinforced Polypropylene Composite Material

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Juan Li
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Bending Strength ◽  
Screw Extruder ◽  
Polypropylene Composite ◽  
Multiwalled Carbon ◽  
Elongation At Break ◽  
Twin Screw ◽  
Pp Composites ◽  
Scanning Electron

Polypropylene (PP) composites reinforced with multiwalled carbon nanotubes (MWNTs) were prepared by using twin screw extruder. The experimental results showed that with the increasing amount of MWNTs the elongation at break decreased whereas the tensile strength, bending strength, and impact strength increased. By using scanning electron microscope (SEM), we find that the hydroxyl-modified carbon nanotube has better dispersion performance in PP and better mechanical properties.

Co-Continuous PPS/PA66 Composites - Part I: Phase Morphology and Structure

2013 ◽  
Vol 804 ◽  
pp. 98-101
Author(s):  
Tao Yin ◽  
Yu Qi Gu ◽  
Jie Hua Gao ◽  
Wen Yue Yu
Keyword(s):  
Electron Microscopy ◽  
Continuous Phase ◽  
Phase Morphology ◽  
Dispersed Phase ◽  
Polyamide 66 ◽  
Screw Extruder ◽  
Wide Range ◽  
Morphology And Structure ◽  
Twin Screw ◽  
Scanning Electron

Poly (phenylene sulfide) (PPS) was blended with polyamide 66 (PA66) in a wide range of compositions by using a co-rotating twin-screw extruder. Scanning electron microscopy and solvent extraction were employed to detect phase morphology of PPS/PA66 composites. The results demonstrated that the phase morphology of PPS/PA66 composites changed from PA66 dispersed phase in PPS matrix to co-continuous phase, and then PPS dispersed phase in PA66 matrix with the increase of PA66 content.

Mechanical and Morphological Properties of Meranti Wood Flour Filled Polypropylene Composites

2016 ◽  
Vol 840 ◽  
pp. 91-96 ◽  
Author(s):  
Bashree Abu Bakar ◽  
Mohamad Najmi Masri ◽  
Mohd Hazim Mohamad Amini ◽  
Mazlan Mohamed ◽  
Muhammad Azwadi Sulaiman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wood Flour ◽  
Morphological Properties ◽  
Screw Extruder ◽  
Polypropylene Composites ◽  
Plastic Composites ◽  
Twin Screw ◽  
Injection Molded ◽  
Fibre Matrix ◽  
Scanning Electron

Wood plastic composites (WPC) have been produced by compounding meranti wood flour (WF) with polypropylene (PP) copolymer using a twin-screw extruder. The meranti WF content was varied from 30 to 60 wt.%. The mechanical properties, i.e. tensile, flexural and impact of the composites were determined on injection-molded specimens. The tensile fractured surfaces were used to study the morphological properties of the composites. The result shows that the increment in WF content has given a significant improvement in modulus properties but at the expense of strength and toughness properties. A commercial maleic anhydride grafted polypropylene (MAPP) compatibilizer at 5 wt.% was incorporated into the PP40/WF60 formulation. The strength, stiffness and toughness properties were improved significantly in the presence of MAPP. The morphology of the composites was studied by scanning electron microscopy (SEM). The improvement of the fibre-matrix adhesion between the WF and PP matrix as revealed by SEM is believed to be one of the major reasons for the improved mechanical properties.

Morphology and Crystallization Behavior of Toughened Poly(Trimethylene Terephthalate) Blends with Acrylonitrile-Butadiene-Styrene

2013 ◽  
Vol 791-793 ◽  
pp. 240-243
Author(s):  
Kun Yan Wang
Keyword(s):  
Crystallization Behavior ◽  
Acrylonitrile Butadiene Styrene ◽  
Screw Extruder ◽  
Differential Scanning Colorimetry ◽  
The Matrix ◽  
Twin Screw ◽  
Trimethylene Terephthalate ◽  
Partical Size ◽  
Scanning Electron ◽  
Butadiene Styrene

Poly (trimethylene terephthalate) (PTT)/acrylonitrile-butadiene-styrene (ABS) blends have been prepared in composition with various ratios using the twin screw extruder approach. Their morphologies and crystallization behavior were investigated. Typical sea-island morphologies were observed by scanning electron microscopy. The partical size of ABS increased as the content of ABS increasing. Differential scanning colorimetry (DSC) experiments showed that the melting point of pure PTT and their blends was almost constant. The presence of the ABS increased the crystallinity of the matrix in PTT/ABS blends with ABS content less than 30wt%.

Effects of Fiber Mass Fraction and Alkali Concentration on Mechanical Properties of Biodegradable Composites

2010 ◽  
Vol 152-153 ◽  
pp. 1677-1682
Author(s):  
Zhi Yong Qin ◽  
Yi Qiang Wu ◽  
Xin Gong Li ◽  
Yan Qing
Keyword(s):  
Mechanical Properties ◽  
Mass Fraction ◽  
Alkali Treatment ◽  
Wood Fiber ◽  
Alkali Concentration ◽  
Molding Machine ◽  
Screw Extruder ◽  
Biodegradable Composites ◽  
Twin Screw ◽  
Scanning Electron

Biodegradable composites of polylactic acid reinforced with wood fiber are fabricated by using twin screw extruder followed by the injection molding machine. The effects of fiber mass fraction and alkali concentration on mechanical properties of biodegradable composites are investigated. The results show that the mechanical properties of biodegradable composites presented tendency which reduced first, elevated, and again reduced along with fiber mass fraction increased, after the alkali treatment, the mechanical properties of biodegradable composites have the tendency which increased first and then reduced, when the concentration of alkali solution is 8%, both the tensile strength and impact strength are best. The scanning electron microscope and Infrared Spectrum Analysis are also used for examination of biodegradable composites.

Co-Continuous PPS/PA66 Composites - Part II: Mechanical Performance

2013 ◽  
Vol 804 ◽  
pp. 102-105
Author(s):  
Tao Yin ◽  
Yu Qi Gu ◽  
Chun Yu Yu ◽  
Zi Xin Li
Keyword(s):  
Mechanical Properties ◽  
Phase Structure ◽  
Mechanical Performance ◽  
Mechanical Analysis ◽  
Continuous Phase ◽  
Polyamide 66 ◽  
Screw Extruder ◽  
Wide Range ◽  
Twin Screw

Poly (phenylene sulfide) (PPS) was blended with polyamide 66 (PA66) in a wide range of compositions by using a co-rotating twin-screw extruder. Dynamic mechanical analysis was used in determination of the co-continuous phase. The results allowed to precisely detecting the range of co-continuity. In addition, the mechanical properties of PPS/PA66 composites can also be used to identify the dispersed/matrix phase or co-continuous phase structure.

Preparation and Damping Properties of Cups-Stacked Carbon Nanotubes(CSCNTs)/Prime 20

2012 ◽  
Vol 557-559 ◽  
pp. 493-496
Author(s):  
Yan Liu ◽  
Rui Feng Li ◽  
Hua Xin Peng ◽  
Zhi Wu Han
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Physical And Mechanical Properties ◽  
Resin System ◽  
Damping Properties ◽  
Mechanical Mixing ◽  
Epoxy Resin System ◽  
Two Component ◽  
New Type ◽  
Scanning Electron

CSCNT is a new type carbon nanotube, which has better physical and mechanical properties than the traditional materials. In this study, the effect of the dispersion and concentration of cup-stacked carbon nanotubes on mechanical properties of the CSCNTs/epoxy nanocomposites were investigated. The epoxy resin system used in this study was a two component (resin and harder) Prime 20. The CSCNTs were dispersed into the Prime 20 by ultrasonic agitation and mechanical mixing together. And the morphologies of the fracture surface of CSCNTs/Prime 20 nanocomposites were observed by scanning electron microscope (SEM); damping behaviors of the nanocomposites were studied by DMA at frequency domain.

The Study on the Preparation and Properties of PPO/PA66 Alloy with a New Type of Compatibtlizer B

2012 ◽  
Vol 501 ◽  
pp. 99-103 ◽  
Author(s):  
Ya Tong Zhang ◽  
Ying Li ◽  
Li Li ◽  
Xiong Wei Qu
Keyword(s):  
Electron Microscope ◽  
Mechanical Test ◽  
Good Effect ◽  
Screw Extruder ◽  
Transmission Electron ◽  
In Situ Compatibilization ◽  
Twin Screw ◽  
New Type ◽  
Scanning Electron

By blending homemade compatibilizer with carboxylic acid functional groups into the basic materials of PPO and PA66, through twin-screw extruder blending, the PPO/PA66 alloy was prepared. The micromorphological and mechanical properties of PPO/PA66 blends with different contents of the compatibilizer were studied by transmission electron microscope （TEM）, scanning electron microscope （SEM）, mechanical test and Molau test. The results showed that the homemade compatibilizer can improve the mechanical property. Besides showing good effect on the compatibility improvement for PPO/PA blends，it has an in-situ compatibilization for the PPO/PA66 alloy

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 %.

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