Pseudo-Ductility, Morphology and Fractography Resulting from the Synergistic Effect of CaCO3 and Bentonite in HDPE Polymer Nano Composite

Polymeric materials such as High density polyethylene(HDPE) are ductile in nature, having very low strength. In order to improve strength by non-treated rigid fillers, polymeric materials become extremely brittle. Therefore, this work focuses on achieving pseudo-ductility (high strength and ductility) by using a combination of rigid filler particles (CaCO3 and bentonite) instead of a single non-treated rigid filler particle. The results of all tensile-tested (D638 type i) samples signify that the microstructural features and surface properties of rigid nano fillers can render the required pseudo-ductility. The maximum value of tensile strength achieved is 120% of the virgin HDPE, and the value of elongation is retained by 100%. Furthermore, the morphological and fractographic analysis revealed that surfactants are not always going to obtain polymer–filler bonding, but the synergistic effect of filler particles can carry out sufficient bonding for stress transfer. Moreover, pseudo-ductility was achieved by a combination of rigid fillers (bentonite and CaCO3) when the content of bentonite dominated as compared to CaCO3. Thus, the achievement of pseudo-ductility by the synergistic effect of rigid particles is the significance of this study. Secondly, this combination of filler particles acted as an alternative for the application of surfactant and compatibilizer so that adverse effect on mechanical properties can be avoided.

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High strength/high young's modulus polymeric materials.

Kobunshi ◽

10.1295/kobunshi.34.922 ◽

1985 ◽

Vol 34 (11) ◽

pp. 922-925

Author(s):

Masatoshi Iguchi

Keyword(s):

Young’S Modulus ◽

Young's Modulus ◽

Polymeric Materials ◽

High Strength

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Synergistic effect of polycarboxylate superplasticizer and silica fume on early properties of early high strength grouting material for semi-flexible pavement

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.126065 ◽

2022 ◽

Vol 319 ◽

pp. 126065

Author(s):

Yicheng Fang ◽

Xianggang Wang ◽

Lutao Jia ◽

Chao Liu ◽

Zhe Zhao ◽

...

Keyword(s):

Synergistic Effect ◽

Silica Fume ◽

High Strength ◽

Flexible Pavement ◽

Polycarboxylate Superplasticizer ◽

Grouting Material

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A room-temperature self-healing elastomer with ultra-high strength and toughness fabricated via optimized hierarchical hydrogen-bonding interactions

Journal of Materials Chemistry A ◽

10.1039/d1ta08748g ◽

2022 ◽

Author(s):

Liangliang Xia ◽

Ming Zhou ◽

Hongjun Tu ◽

wen Zeng ◽

xiaoling Yang ◽

...

Keyword(s):

Hydrogen Bonding ◽

Mechanical Strength ◽

Room Temperature ◽

Polymeric Materials ◽

High Strength ◽

Self Healing ◽

High Mechanical Strength ◽

Hydrogen Bonding Interactions ◽

Healing Efficiency ◽

Good Healing

The preparation of room-temperature self-healing polymeric materials with good healing efficiency and high mechanical strength is challenging. Two processes are essential to realise the room-temperature self-healing of materials: (a) a...

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Some Key Aspects in the Mechanics of Stress Transfer Between SRG and Masonry

Applied Sciences ◽

10.3390/app10207303 ◽

2020 ◽

Vol 10 (20) ◽

pp. 7303

Author(s):

Giulia Baietti ◽

Tommaso D’Antino ◽

Christian Carloni

Keyword(s):

Stress Transfer ◽

High Strength ◽

Active Role ◽

Fiber Reinforced ◽

Suitable Alternative ◽

Existing Structures ◽

Direct Shear Tests ◽

Frp Composites ◽

Mortar Matrix

The use of composite materials to strengthen masonry structures has become common practice within the civil engineering community. Steel-reinforced grout (SRG), which comprises high-strength steel fibers embedded in a mortar matrix, is part of the family of the fiber-reinforced cementitious matrix (FRCM) composites that represent a suitable alternative to fiber-reinforced polymer (FRP) composites for strengthening existing structures. Although studies on FRCMs have already reached a certain level of maturity, some key issues remain open, such as the role of matrix type and layout, substrate properties, and test rate. This paper focuses on some of these issues. The results of single-lap direct shear tests on masonry blocks strengthened with SRGs are presented to analyze the bond behavior between the composite material and the substrate. Four aspects are considered: (1) the change in the width of the SRG mortar matrix while keeping the width of the fiber sheet fixed; (2) the type of mortar used for the SRG; (3) the influence of the test rate, and (4) the type of substrate (i.e., concrete vs. masonry). The results obtained indicate the active role of the matrix layout and the importance of the test rate, encouraging further investigations to clarify these aspects.

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Epoxy resin filled with primary and secondary raw material – useable in agriculture

Research in Agricultural Engineering ◽

10.17221/23/2013-rae ◽

2014 ◽

Vol 60 (No. 4) ◽

pp. 165-171 ◽

Cited By ~ 2

Author(s):

P. Valášek ◽

J. Kejval ◽

M. Müller

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Epoxy Resin ◽

Filler Particle ◽

Polymeric Materials ◽

Raw Material ◽

Nano Particles ◽

Inorganic Particles ◽

Increase Wear Resistance ◽

Secondary Raw Material

Hard inorganic particles in the interaction with polymeric materials increase wear resistance. Also reactoplastics are suitable for filling with micro- and nano-particles for a purpose of some mechanical properties optimization. The paper compares chosen mechanical properties – hardness, wear resistance and tensile characteristics of epoxy resin filled with artificial corundum with various middle particles sizes and their ratio combination. Mentioned systems can be used in a sphere of the agricultural production at renovation of machine parts, they can serve for creating resistant layers on machines, floors and grillages at the same time. The aim of the carried out experiment is to compare the properties of reactoplastics filled with a primary and secondary raw material and to define an optimum ratio of the filler particle size relating to a given mechanical quality. The artificial corundum was chosen as the primary material, the waste corundum from the process of material mechanical treatment was chosen as the secondary one.    

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