Enhanced ultrasonic imaging property of polyurethane filled with hollow glass beads

2020 ◽  
Vol 41 (7) ◽  
pp. 2588-2597
Author(s):  
Weining Gao ◽  
Rui Lian ◽  
Xiaonong Chen ◽  
Shentao Yan ◽  
Suqiao Zhang ◽  
...  
Keyword(s):  
Ultrasonic Imaging ◽  
Glass Beads ◽  
Hollow Glass ◽  
Imaging Property

Correlation of fatigue behavior and dynamic mechanical properties of hybrid composites of polypropylene/short glass fibers/hollow glass beads

2021 ◽  
pp. 089270572199319
Author(s):  
Gustavo B Carvalho
Keyword(s):  
Stress Relaxation ◽  
Flexural Strength ◽  
Relaxation Rate ◽  
Hybrid Composites ◽  
Fatigue Behavior ◽  
Glass Fibers ◽  
Glass Beads ◽  
Hollow Glass ◽  
Dynamic Mechanical ◽  
Short Glass

Ternary hybrid composites of Polypropylene (PP)/Short Glass Fibers (GF)/Hollow Glass Beads (HGB) were prepared using untreated and aminosilane-treated HGB, compatibilized with maleated-PP, and with varying total and relative GF/HGB contents. Static/short-term flexural strength properties data revealed, through lower flexural strength values, that the presence of untreated HGB particles induces to fiber-polymer interfacial decoupling at much higher extent than in the presence of aminosilane-treated HGB particles. This phenomenon is also evident when evaluating the data from displacement-controlled three-point bending fatigue tests. Monitored up to 106 cycles, the analyzed hybrid composites presented distinct performance relative to their fatigue stress relaxation rate: the lower the matrix-reinforcements’ interfacial adhesion, more pronounced the stress relaxation rate as a function of the number of fatigue cycles. Dynamic Mechanical Thermal Analysis (DMTA) results could successfully reveal the hybrid composites behavior at the microstructural level when they were submitted to both static flexural test and fatigue, depending on the degree of interfacial interactions between the polymer matrix of PP and the hybrid reinforcements of GF and HGB (with and without aminosilane surface treatment).

Melt extrudate swell behavior of polypropylene composites filled with hollow glass beads

2012 ◽  
Vol 32 (4-5) ◽  
pp. 259-263 ◽  
Author(s):  
Ji-Zhao Liang ◽  
Ming-Qiang Zhong
Keyword(s):  
Volume Fraction ◽  
Deformation Energy ◽  
Glass Beads ◽  
Screw Extruder ◽  
Extrudate Swell ◽  
Experimental Conditions ◽  
Hollow Glass ◽  
Polypropylene Composites ◽  
Swell Ratio ◽  
Twin Screw

Abstract Polypropylene (PP) composites filled with hollow glass beads (HGB) were prepared by means of a twin-screw extruder. The extrudate swell ratio (B) of the PP/HGB composite melts was measured using a melt flow indexer under experimental conditions, with temperatures from 190°C to 230°C and loads varying from 1.20 kg to 7.50 kg, to identify the effects of the extrusion conditions and the particle size and content on the extrudate swell of composite melts. The results showed that the value of B of the composites increased nonlinearly with an increase of shear stress, while it decreased linearly with a rise of temperature. When the load and temperature were constant, the value of B increased nonlinearly with an increase of the HGB diameter, whereas it reduced nonlinearly with an increase of the HGB volume fraction. This should be attributed to the elastic deformation energy stored in the flow of the composite melts, which was decreased with an increase of the HGB number and content.

Inactivation of algal blooms in eutrophic waterof drinking water supplies with the photocatalysisof TiO2 thin film on hollow glass beads

2005 ◽  
Vol 52 (9) ◽  
pp. 145-152 ◽  
Author(s):  
S.-C. Kim ◽  
D.-K. Lee
Keyword(s):  
Thin Film ◽  
Algal Blooms ◽  
Tio2 Thin Film ◽  
Photosynthetic Activity ◽  
Uv Light ◽  
Glass Beads ◽  
Practical Application ◽  
Hollow Glass ◽  
Photocatalytic Inactivation ◽  
Inactivation Efficiency

Photocatalytic inactivation of algae, Anabaena, Microcystis, and Melosira, was carried out with TiO2-coated Pyrex hollow glass beads under the illumination of UV light (370nm wavelength). After being irradiated with UV light in the presence of the TiO2-coated Pyrex glass beads, Anabaena and Microcystis, known as typical cyanobacteria, lost their photosynthetic activity, and the string of Anabaena cells and the colonies of Microcystis cells were completely separated into individual spherical ones. In the case of Melosira, which is a typical diatom, however, somewhat lower photocatalytic inactivation efficiency was obtained, which was believed to be due to the presence of the inorganic siliceous wall surrounding the cells of Melosira. The TiO2-coated hollow glass beads could successfully be employed for the practical application in a eutrophicated river under sunlight. More than 50% of the chlorophyll-a concentration could be reduced by the action of TiO2 photocatalysis.

Development and Rheological Characterization of Suspension of Hollow Glass Beads

2016 ◽  
Author(s):  
Simone Lumsden ◽  
John P. Singh ◽  
Ronnie G. Morgan ◽  
Gregory Hundt
Keyword(s):  
Glass Beads ◽  
Rheological Characterization ◽  
Hollow Glass
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