scholarly journals Lightweight Poly(ε-Caprolactone) Composites with Surface Modified Hollow Glass Microspheres for Use in Rotational Molding: Thermal, Rheological and Mechanical Properties

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 624 ◽  
Author(s):  
Adriano Vignali ◽  
Salvatore Iannace ◽  
Giulio Falcone ◽  
Roberto Utzeri ◽  
Paola Stagnaro ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oxidative Degradation ◽  
Crystallization Rate ◽  
Rotational Molding ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Inorganic Particles ◽  
Hollow Glass ◽  
The Matrix ◽  
Surface Modified

In this work, novel composites based on poly(ε-caprolactone) (PCL) were prepared and characterized in terms of morphological, thermal, rheological and mechanical properties. Hollow glass microspheres (HGM), alone or surface modified by treatment with (3-aminopropyl)triethoxysilane (APTES) in order to enhance the compatibility between the inorganic particles and the polymer matrix, were used to obtain lightweight composites with improved properties. The silanization treatment implies a good dispersion of filler particles in the matrix and an enhanced filler–polymer adhesion. The addition of HGM to PCL has relevant implications on the rheological and mechanical properties enhancing the stiffness of the material. Furthermore, the presence of HGM strongly interferes with the crystallization behavior and thermo-oxidative degradation of PCL. The increase of PCL crystallization rate was observed as a function of the HGM amount in the composites. Finally, rotational molding tests demonstrated the possibility of successfully producing manufactured goods in PCL and PCL-based composites on both a laboratory and industrial scale.

Tensile and Impact Properties of Recycled Poly(Ethylene Terephthalate) and Polycarbonate Composites Reinforced with Silane Treated Hollow Glass Microspheres

2018 ◽  
Vol 772 ◽  
pp. 33-37
Author(s):  
Nattakarn Hongsriphan ◽  
Pajaera Patanathabutr ◽  
Kanyakarn Lappokachai
Keyword(s):  
Mechanical Properties ◽  
Interfacial Adhesion ◽  
Ethylene Terephthalate ◽  
Chain Extender ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Poly Ethylene Terephthalate ◽  
Fixed Composition ◽  
Poly Ethylene

Recycled poly (ethylene terephthalate) or R-PET is conventionally melt blended with polycarbonate with the presence of chain extender in order to produce polymer blend that provides good mechanical properties and cost effectiveness. This research was carried out to improve properties of such a blend by compounding them with silane treated hollow glass microspheres (HGMs), which mixing procedure was emphasized how it could affect mechanical properties. R-PET/PC/HGM composites of a fixed composition were melt compounded with three different mixing procedures. It was found that the compounding HGMs with PC and then R-PET obtained the most rigidity specimens than the all-in-one compounding or the compounding HGMs with R-PET and then PC. Silane treated HGMs were well distributed in the polymer matrix presenting good interfacial adhesion. However, the notched impact strength of all composites were inspected to be in the same range.

Floating Adsorbent for Organic Removal Fabricated Through Crystallization of Silicalite-1 on Hollow Glass Microspheres

2020 ◽  
Vol 12 (2) ◽  
pp. 173-179 ◽  
Author(s):  
Supinya Nijpanich ◽  
Takeshi Hagio ◽  
Yuki Kamimoto ◽  
Ryoichi Ichino
Keyword(s):  
Hydrothermal Synthesis ◽  
Crystallization Rate ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Structure Directing Agent ◽  
Hollow Glass ◽  
Key Factor ◽  
Type Zeolite ◽  
High Silica ◽  
Filter Clogging

MFI-type zeolite is a crystalline microporous aluminosilicate with an intersecting two-dimensional pore structure and well-defined windows of approximately 0.55 nm. It generally crystallizes in high silica to alumina ratios, leading to a rather hydrophobic character. This makes it an attractive adsorbent for removing organic pollutants from wastewater. However, separating the conventional powdery-zeolites from the media after treatment is difficult because they require considerable time to settle. They also trigger filter clogging. In this work, high silica MFI-type zeolite, namely, silicalite-1, was synthesized on the surfaces of hollow glass microspheres to develop a floating adsorbent with high hydrophobicity. Tetraethylorthosilicate and tetrapropylammonium hydroxide were used as the additional silica source and structure directing agent, respectively. The crystallization of silicalite-1 on hollow glass microspheres was performed using hydrothermal synthesis at 180 °C or 150 °C for 40 h using a precursor sol with a molar composition of 3SiO2:1TPA:14EtOH:286H2O. The surface coverage and crystallinity of the as-prepared samples were optimized, and the floatability and adsorption performance of the optimized sample were investigated. Well-covered microspheres were obtained when hydrothermal synthesis was conducted at 180 °C using 0.5 g of hollow glass microspheres and 15 g of a precursor sol adjusted to pH 12.5. The balance between the dissolution rate of the hollow glass microspheres and the crystallization rate of silicalite-1 appeared to be the key factor in the successful synthesis.

Light weight LDPE composites with surface modified hollow glass microspheres

2018 ◽  
Author(s):  
Giulio Falcone ◽  
Adriano Vignali ◽  
Roberto Utzeri ◽  
Gloria Porta ◽  
Fabio Bertini ◽  
...  
Keyword(s):  
Light Weight ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Ldpe Composites ◽  
Surface Modified

scholarly journals Poly(acrylonitrile-co-butadiene-co-styrene) Reinforced with Hollow Glass Microspheres: Evaluation of Extrusion Parameters and Their Effects on the Composite Properties

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Marina Panozzo Cunha ◽  
Laura Berasain Gonella ◽  
Matheus Poletto ◽  
Ana Maria Colon Grisa ◽  
Rosmary Nichele Brandalise
Keyword(s):  
Mechanical Properties ◽  
Flexural Modulus ◽  
Twin Screw Extruder ◽  
Glass Microspheres ◽  
Screw Extruder ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Twin Screw ◽  
Feeding Zone ◽  
Poly Acrylonitrile

Hollow glass microspheres (HGMs) filled poly(acrylonitrile-co-butadiene-co-styrene) (ABS) composites were prepared by means of a twin-screw extruder. S038 HGMs were incorporated at different percentages of 2.5, 5.0, and 7.5 wt%. The HGMs were added into the twin-screw extruder at two different feeding zones, and the effect of HGMs loading and specific feeding zone addition on the composites produced was evaluated with regard to morphological, thermal, rheological, physical, and mechanical properties. As a result, the composite density was reduced while the thermal stability, storage modulus, complex viscosity, and tensile and flexural modulus were improved when compared with the ABS matrix. The results also indicate that the addition of 5.0 wt% of HGMs at the feeding zone closer to the die maintains the integrity of the HGMs and promotes composites with higher mechanical properties and lower density when compared with the composites obtained with the addition of HGMs closer to the hopper.

Physical-Mechanical Properties of Hollow Glass Microspheres Filled Polypropylene Composites for Injection Moulding

2015 ◽  
Vol 669 ◽  
pp. 3-10 ◽  
Author(s):  
Luboš Bĕhálek ◽  
Petr Lenfeld ◽  
Jiří Habr ◽  
Jozef Dobránsky ◽  
Martin Seidl ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Differential Scanning Calorimetry ◽  
Average Diameter ◽  
Water Cooling ◽  
Glass Microspheres ◽  
Scanning Calorimetry ◽  
Adhesion Promoter ◽  
Hollow Glass Microspheres ◽  
Hollow Glass ◽  
Polypropylene Composites

The paper deals with the study physical-mechanical properties of polypropylene composites in dependence on amount of hollow glass microspheres in matrix. Composite material compounded by method "Water cooling strand pelletizing" consists of polypropylene, adhesion promoter and hollow glass microspheres with average diameter (18÷20) μm and different density: 0,46 g/cm3 (iM16K) and 0,60 g/cm3 (iM30K). Measured results are compared with talc filled polypropylene. In terms of experimental measurement is by the differential scanning calorimetry method evaluated also course of prepared composites crystallization. Finally there are concluded measured results not only regarding utility properties of parts but regarding also possibilities to control and optimize processing process.

Lightweight polyethylene‐hollow glass microspheres composites for rotational molding technology

2020 ◽  
Vol 138 (5) ◽  
pp. 49766
Author(s):  
Paola Stagnaro ◽  
Roberto Utzeri ◽  
Adriano Vignali ◽  
Giulio Falcone ◽  
Salvatore Iannace ◽  
...  
Keyword(s):  
Rotational Molding ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
Hollow Glass
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