The mechanical properties and morphology of a graphite oxide nanoplatelet/polyurethane composite

2009 ◽  
Vol 20 (8) ◽  
pp. 085712 ◽  
Author(s):  
Dongyu Cai ◽  
Kamal Yusoh ◽  
Mo Song
Keyword(s):  
Mechanical Properties ◽  
Graphite Oxide ◽  
Polyurethane Composite

scholarly journals Few-layer graphene aqueous suspensions for polyurethane composite coatings

MRS Advances ◽  
2016 ◽  
Vol 2 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Eunice Cunha ◽  
Fernando Duarte ◽  
M. Fernanda Proença ◽  
M. Conceição Paiva
Keyword(s):  
Mechanical Properties ◽  
Tensile Testing ◽  
Composite Coatings ◽  
Composite Films ◽  
Water Vapor Permeability ◽  
Waterborne Polyurethane ◽  
Vapor Permeability ◽  
Layer Graphene ◽  
Polyurethane Composite ◽  
Few Layer Graphene

ABSTRACTGraphite nanoplates (GnP) have recently attracted attention as an economically viable alternative for the development of functional and structural nanocomposites. The incorporation of GnP into waterborne polyurethane (WPU) with loadings from 0.1 to 10 wt.% was studied. The mechanical properties of the composite films were assessed by tensile testing showing an increase of the Young’s modulus up to 48%. The electrical conductivity increased by 9 orders of magnitude and the water vapor permeability of the composite films decreased 57% for composites containing 5.0 wt.% of GnP.

Thermo-mechanical properties of polyurethane modified with graphite oxide and carbon nanotube particles

2016 ◽  
Vol 173 (1) ◽  
pp. 1-11 ◽  
Author(s):  
S. Gaidukovs ◽  
V. Kampars ◽  
J. Bitenieks ◽  
I. Bochkov ◽  
G. Gaidukova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Graphite Oxide

The Impact Properties of a Polyurethane Composite Filled with Clay

2011 ◽  
Vol 197-198 ◽  
pp. 1100-1103
Author(s):  
Jian Li
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Mechanical Analysis ◽  
Impact Testing ◽  
Impact Properties ◽  
Polyurethane Composite ◽  
The Matrix ◽  
The Impact ◽  
Scanning Electron

A polyurethane/clay (PU/clay) composite was synthesized. The microstructure of the composite was examined by scanning electron microscopy. The impact properties of the composite were characterized by impact testing. The study on the structure of the composite showed that clays could be dispersed in the polymer matrix well apart from a few of clusters. The results from mechanical analysis indicated that the impact properties of the composite were increased greatly in comparison with pure polyurethane. The investigation on the mechanical properties showed that the impact strength could be obviously increased by adding 20 wt% (by weight) clay to the matrix.

Enhanced effect of OMMT and KH-Al2O3 on polyurethane composite mechanical properties

2020 ◽  
Vol 27 (9) ◽  
Author(s):  
Yufei Chen ◽  
Yulong Liu ◽  
Chunyan Yue ◽  
Chengjun Teng ◽  
Simin Chen
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Composite

Development and characterization of thermoset nanocomposites reinforced with cotton fibres recovered from textile waste

2020 ◽  
pp. 152808372091353 ◽  
Author(s):  
Zunjarrao Kamble ◽  
Bijoya Kumar Behera ◽  
Teruo Kimura ◽  
Ino Haruhiro
Keyword(s):  
Mechanical Properties ◽  
Graphite Oxide ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Oxide Nanoparticles ◽  
Degradation Behaviour ◽  
Textile Waste ◽  
Cotton Fibres ◽  
Thermoset Epoxy

The present research reports thermoset nanocomposites reinforced with cotton fibres extracted from textile waste called as ‘shoddy’ and graphite oxide nanoparticles as filler. The oriented fibre web of shoddy was produced by using the carding machine and it was used as reinforcement. The thermoset epoxy composites with four different fibre volume fraction values namely 0.1, 0.2, 0.3 and 0.4 were developed. These composites were characterized by mechanical properties to optimize the fibre volume fraction. Further, thermoset epoxy nanocomposites were developed by incorporating graphite oxide nanoparticles as filler in four different weight percentages, namely 0.1, 0.3, 0.5 and 1%. All the composites were characterized for mechanical properties, dynamic mechanical properties, thermal degradation behaviour and water absorption behaviour. It has been found that the developed composites can be used in items of furniture materials and to develop some visible and non-visible automotive components.

scholarly journals Study of Ratio Variation of Binary Components of Cross Linking Agent on Extent of Polymerization and Mechanical Properties of Polyurethane Composites

2019 ◽  
Vol 31 (11) ◽  
pp. 2537-2542
Author(s):  
A. Sharma ◽  
S.K. Sharma ◽  
A. Rani
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Testing Machine ◽  
Cross Linking ◽  
Component Ratio ◽  
Polyurethane Composite ◽  
Ratio Variation ◽  
Curing Agents ◽  
Butane Diol ◽  
Trimethylol Propane

Polyethylene glycol based polyurethane polymer and its fly ash reinforced polyurethane composite were prepared by optimizing the concentration ratio of binders, cross linking agents and curing agents. The components ratio of cross linking agents with the same hydroxyl functionalities i.e. 1,4-butane diol and 1,1,1-trimethylol propane affects the mechanical properties of polymer. The extent of polymerization of polyurethane matrix and fly ash reinforced polyurethane composite was found to be independent of the component ratio of cross linking agents. PEG based polyurethane polymer and their fly ash-reinforced composite can be synthesized at particular ratio by mass of cross linking agents i.e. 0.5 keeping constant w/w ratio 3:2 of binders and curing agents. Effect of w/w ratio variation of cross linking agents on the extent of polymerization has been studied through SEM technique. Cross linking agents, curing agents and polyurethane composite have been characterized by IR spectra. Effect of w/w ratio variation of binary components 1,4-butane diol and 1,1,1-trimethylol propane of cross linking agents on the mechanical properties of fly ash-reinforced polyurethane composite has been studied by evaluating tensile strength and Young modulus of composite material by universal testing machine. Hardness of fly ash-reinforced polyurethane composite with different ratio of 1,4-butane diol and 1,1,1-trimethylol propane of cross linking agents was evaluated by durometer

Effects of γ-Ray Irradiation on the Properties of Nano-Hydroxyapatite/Polyurethane Composite Porous Scaffolds

2016 ◽  
Vol 852 ◽  
pp. 422-427 ◽  
Author(s):  
Jia Xing Jiang ◽  
Li Mei Li ◽  
Li Li Lin ◽  
Yi Zuo ◽  
Yu Bao Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Irradiation Dose ◽  
Porous Scaffold ◽  
Porous Scaffolds ◽  
Mechanical And Thermal Properties ◽  
Structure And Properties ◽  
Composite Scaffolds ◽  
Remarkable Effect ◽  
Polyurethane Composite ◽  
Γ Ray

To well understand the influence of the sterilization on the properties of biomaterials prior to application is pivotal. The effect of γ-ray irradiation on the mechanical and thermal properties of nanohydroxyapatite/polyurethane (n-HA/PU) porous scaffold for bone tissue engineering was studied in this paper. The mechanical testing, fourier transform infrared spectroscopy and thermal analysis were employed to determine the structure and properties change of these composite scaffolds after γ-ray irradiation with different doses.The results show that thermal stability, and mechanical properties of the composite scaffolds increase after γ-ray irradiation with doses of15 kGy to 25 kGy, especially the irradiation dose of 15kGy which imposed a remarkable effect on these properties. However, a reverse trend is found when the 50kGy irradiation dose was applied.In general, it can be concluded that sterilization using γ-ray irradiation with proper dose has no adverse effect on the properties of n-HA/PU composite scaffolds.

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