Effect of excipient particle size distribution variability on compact tensile strength; and its in-line prediction by force-displacement and force-time profiling

AbstractMagnesium hydroxide was prepared under controlled conditions from aqueous Mg(NO3)2 and NaOH solutions. The small, nanoplate-shaped particle size distribution was monomodal from 164 to 459 nm. Functional polypropylene/Mg(OH)2 and polypropylene/polypropylene 1% maleic anhydride/Mg(OH)2 composites were prepared containing 10% or 30% Mg(OH)2. The composites have a high Young’s modulus (twice that of polypropylene) and comparable tensile strength but less ductility. EDX examination of the fractured composite surfaces suggested a homogeneous Mg(OH)2 distribution for composites produced with the addition of polypropylene grafted with maleic anhydride. The polypropylene/Mg(OH)2 composites showed good antibacterial activity. The polypropylene/polypropylene 1% maleic anhydride/Mg(OH)2 composites were less effective.

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Influence of Solid Particle Size on Burning and Mechanical Properties of AP/Al/HTPB Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.510-511.500 ◽

2012 ◽

Vol 510-511 ◽

pp. 500-506 ◽

Cited By ~ 1

Author(s):

Z. Mehmood ◽

Mohammad Bilal Khan ◽

T. Abbas ◽

Nasir M. Ahmad

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Tensile Strength ◽

Particle Size Distribution ◽

Burning Rate ◽

Size Distribution ◽

Maximum Stress ◽

Aluminum Particles ◽

Tensile Tester ◽

Coarse To Fine

Mechanical and ballistics properties are a measure of the performance of AP/Al/HTPB composites. These properties are influenced by the characteristics of inorganic crystalline oxidizer and aluminum particles. This paper reports the effect of the particle size distribution on mechanical and burning properties of 87% solid loaded composites. Composites were fabricated by mixing the ingredients in the planetary mixer followed by curing at an elevated temperature for several days. Multimodal particle size distribution was used in which coarse to fine ratio was varied proportionally. The burning rate was measured using strand burner at various pressures. Mechanical properties of the composites were investigated by using tensile tester. Results revealed that tensile strength and the burning rate increased while elongation at maximum stress decreased with the increase in the quantity of fines oxidizer. Whereas the variation in the particle size of the aluminum do not have any pronounced effect on the burning as well as mechanical properties of the composite.

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Numerical modeling of the tensile strength of a biological granular aggregate: Effect of the particle size distribution

EPJ Web of Conferences ◽

10.1051/epjconf/201714008013 ◽

2017 ◽

Vol 140 ◽

pp. 08013 ◽

Cited By ~ 1

Author(s):

Karsta Heinze ◽

Xavier Frank ◽

Valérie Lullien-Pellerin ◽

Matthieu George ◽

Farhang Radjai ◽

...

Keyword(s):

Particle Size ◽

Tensile Strength ◽

Numerical Modeling ◽

Particle Size Distribution ◽

Size Distribution ◽

Aggregate Effect ◽

Granular Aggregate

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Impact of Selected Properties of Raw Material on Quality Features of Granular Fertilizers Obtained from Digestates and ASH Mixtures

Agricultural Engineering ◽

10.1515/agriceng-2016-0078 ◽

2016 ◽

Vol 20 (4) ◽

pp. 207-217 ◽

Cited By ~ 3

Author(s):

Marek Wróbel ◽

Jarosław Frączek ◽

Marcin Jewiarz ◽

Krzysztof Mudryk ◽

Krzysztof Dziedzic

Keyword(s):

Particle Size ◽

Tensile Strength ◽

Particle Size Distribution ◽

Size Distribution ◽

Raw Material ◽

Absolute Density ◽

The Impact ◽

Quality Features ◽

Compaction Degree

Abstract The paper presents the results of research, the objective of which was to determine the impact of particle size distribution and density of digestates and ash on density and tensile strength of granular fertilizer obtained from mixtures of these substrates. Particle size distribution, absolute density, envelope density and porosity of substrates were determined. Granular fertilizers were made of clean substrates and their mixtures. Envelope density of the obtained granulates was within 0.81 - 1.88 g⋅cm-3. The determined compaction degree was within 3.65 - 10.12. While, the compaction index IS of granulates made of mixtures was within 0.5 - 0.55 and was lower in comparison to IS of granulates from digestates (0.6) and ash (0.76).

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