Physical Properties and Rheological Behavior of Pseudofruits ofHovenia dulcisThunb. In Different Maturity Stages

Jatropha curcas L. is a multipurpose bioenergy crop. Physical properties of J. curcas fruits and seeds are a fundamental knowledge required for the design of processing machinery. Therefore, this research investigates the physical properties at different maturity stages as indicated by pericarp color of the fruits (green, yellow, and black). Rupture force, hardness, deformation at rupture point, deformation ratio at rupture, and energy used for rupture were measured in the length and width direction of the fruits and in the length, width, and thickness of the seeds. During the course of maturing, a decrease in the unit mass and the surface area of the fruits was observed with a simultaneous increase for the seeds. Moisture content decreased during maturing. Bulk density and solid density were considerably different among maturity stages. The lowest porosity was observed in black fruits as well as “black” seeds. The highest dynamic and static angle of repose was detected for black fruits, while no substantial difference was observed between “yellow” and “black” seeds. The highest and lowest coefficient of static friction for all fruits and seeds was found on rubber and plastic surfaces.

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Rheological Behavior Models of Polymers

Biointerface Research in Applied Chemistry ◽

10.33263/briac121.12631272 ◽

2021 ◽

Vol 12 (1) ◽

pp. 1263-1272

Keyword(s):

Physical Properties ◽

Rheological Properties ◽

Power Law ◽

Rheological Behavior ◽

Arrhenius Law ◽

Comprehensive Review ◽

Rheological Behaviors ◽

Behavior Models

We studied and investigated the various viscosimetric and rheological polymers' behaviors during this comprehensive review. The viscosities relate to the investigation of the flux, the deformation, and the polymers' elasticity; we have employed the viscosity since this plays a primordial role in the phenomena flux and implementation of the polymer. The rheology behaviors were investigated for the determination of the physical properties of polymers. The rheological properties are mostly employed for improving polymers implementation. Further, three rheological behaviors models such as Newtonian, pseudo-plastic (Power Law, Law of Tile and Cross Law) and heat-dependent pseudo-plastic (Williams-Landel-Ferry Law (WLF), Law of Tile-Yasuda and Arrhenius law) were studied.

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Comparison of structure and properties of conventional and ?high-crystallinity? isotactic polypropylenes and their blends with metallocene-catalyzed linear low-density polyethylene. I. Relationships between rheological behavior and thermal and physical properties

Journal of Applied Polymer Science ◽

10.1002/1097-4628(20000815)77:7<1591::aid-app20>3.0.co;2-m ◽

2000 ◽

Vol 77 (7) ◽

pp. 1591-1599 ◽

Cited By ~ 21

Author(s):

N. Kukaleva ◽

F. Cser ◽

M. Jollands ◽

E. Kosior

Keyword(s):

Physical Properties ◽

Rheological Behavior ◽

Low Density Polyethylene ◽

Low Density ◽

Structure And Properties ◽

Linear Low Density Polyethylene ◽

High Crystallinity

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Formulation and Characterization of Clotrimazole Microemulsions and Microemulsion-Based Gels

International Journal of Nanoscience ◽

10.1142/s0219581x14400055 ◽

2014 ◽

Vol 13 (04) ◽

pp. 1440005 ◽

Cited By ~ 2

Author(s):

Jarika Kaewbanjong ◽

Thanaporn Amnuaikit ◽

Prapaporn Boonme

Keyword(s):

Drug Delivery ◽

Physical Properties ◽

Rheological Behavior ◽

Fumed Silica ◽

Isopropyl Alcohol ◽

Sorbitan Monooleate ◽

Thickening Agent

This study aimed to formulate and physically characterized clotrimazole microemulsions and microemulsion based-gels compared with their blank counterparts. Microemulsions were prepared by simple mixing of isopropyl palmitate, 2:1 mixture of water and isopropyl alcohol and 1:1 mixture of polyethylene 20 sorbitan monooleate and sorbitan monooleate. To develop microemulsion-based gels, fumed silica was use as a thickening agent at 2.5, 5 or 7.5% w/w. All studied formulations, i.e., 2 microemulsions and 6 microemulsion based-gels were investigated for physical properties such as appearance, conductivity, pH, rheological behavior and spreadability. Afterwards, 2 microemulsions (ME1 and ME2) and 2 microemulsion based-gels (MBG1-3 and MBG2-2) were selected to incorporate with clotrimazole and then investigated for physical properties. All formulations showed good appearance and physical properties. Clotrimazole did not affect most characteristics of their blank counterparts, except conductivity. Therefore, the investigated microemulsions and microemulsion based gels could be used as the vehicles of clotrimazole for skin drug delivery.

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Effect of low-load reinforcing nanofillers on rheological behavior and physical properties of ionic elastomers based on XNBR and MgO

Journal of Applied Polymer Science ◽

10.1002/app.26795 ◽

2007 ◽

Vol 106 (2) ◽

pp. 973-980 ◽

Cited By ~ 4

Author(s):

A. Rodríguez ◽

L. Ibarra ◽

I. Mora

Keyword(s):

Physical Properties ◽

Rheological Behavior ◽

Low Load

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Water-Resistant Release Coating for Uncured Rubber

Rubber Chemistry and Technology ◽

10.5254/1.3535850 ◽

1981 ◽

Vol 54 (5) ◽

pp. 1124-1131 ◽

Cited By ~ 1

Author(s):

T. H. Kuan ◽

J. G. Sommer

Keyword(s):

Physical Properties ◽

Rheological Behavior ◽

Unique Combination ◽

Release Agent ◽

Rubber Compounds ◽

Roll Mill ◽

Rate Of Cooling ◽

Hot Surface ◽

Low Rate

Abstract Rubber is conventionally formed into sheets or slabs on a two-roll mill. These are immersed in a release agent (slab dip), followed by cooling and drying in air. The low rate of cooling associated with air limits the throughput in rubber mixers. The throughput can be significantly increased through the use of water for cooling. However, water cannot be used with conventional slab dips; it washes them from the rubber slabs, causing the slabs to stick together after stacking. A new slab dip now permits cooling rubber slabs rapidly with water. After they are dried and stacked, the slabs do not stick together. The new dip contains a unique combination of a carboxylated SBR latex, a heat sensitizer, fillers and other additives. The heat sensitizer causes the latex to gel rapidly after it contacts the hot surface of the rubber slabs; this provides a water-resistant release coating. Other additives in this slab dip control its wetting and rheological behavior. The new dip does not significantly alter physical properties of rubber compounds after they are coated and reprocessed.

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