scholarly journals Efficiency of Twin-Screw Extrusion of Biodegradable Poly (Butylene Succinate)-Wheat Bran Blend

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 424
Author(s):  
Emil Sasimowski ◽  
Łukasz Majewski ◽  
Marta Grochowicz
Keyword(s):  
Polymer Blend ◽  
Flow Rate ◽  
Wheat Bran ◽  
Rotational Speed ◽  
Twin Screw Extrusion ◽  
Butylene Succinate ◽  
Extrusion Processing ◽  
Screw Extrusion ◽  
Twin Screw ◽  
The Impact

Unmodified poly (butylene succinate) (PBS) is characterized by very good processability; however, after the incorporation of various fillers of plant origin, its processing becomes much more complicated and its properties are significantly affected. Detailed studies of the processing aspects of PBS/wheat bran (WB) biocomposition are lacking, despite the addition of WB having a significant impact on both the production efficiency and the properties of end products. This research paper presents test results of the co-rotating twin-screw extrusion processing of a biodegradable polymer blend, the matrix of which was PBS, with WB as the filler. In undertaking this task, we examined the impact of extruder screw rotational speed and WB content on the characteristics of extrusion processing, as well as on certain thermal, physical, structural and processing properties of the obtained blend. The WB introduced to the blend was in the form of a selected fraction with particles smaller than 0.2 mm. The measurements were conducted using the Design of Experiment (DOE) methods, which enabled establishing the studied relationships in the form of polynomials and response surfaces. The determined extrusion process characteristics covered the impact of screw rotational speed and WB content on the mass flow rate of the processed blend and its pressure, the screw drive torque and specific energy consumption. The studies of the obtained polymer blend included determining the impact of the aforementioned variable factors on the melt flow rate (MFR) index, chemical structure (FTIR), thermal properties (differential scanning calorimetry (DSC), thermogravimetry (TG), derivative thermogravimetry (DTG)), p-v-T relationships, microstructure, density and moisture absorbance. Analysis of variance (ANOVA) was used to assess the effect of individual variable factors. The results of this work are presented, inter alia, using Pareto charts of standardized effects, which illustrate the influence of individual terms of the determined regression equations on the studied quantity.

Definition of a JA-2 Equivalent Propellant to be Produced by Continuous Solventless Extrusion

2013 ◽  
Vol 80 (3) ◽  
Author(s):  
Thelma G. Manning ◽  
Joseph Leone ◽  
Martijn Zebregs ◽  
Dinesh R. Ramlal ◽  
Chris A. van Driel
Keyword(s):  
Extrusion Process ◽  
Continuous Manufacturing ◽  
Twin Screw Extrusion ◽  
Extrusion Processing ◽  
Roll Mill ◽  
Screw Extrusion ◽  
Twin Screw ◽  
Ballistic Properties ◽  
Definition Of ◽  
Double Base

In order to eliminate residual solvents in ammunition and to reduce the emissions of volatile organic compounds to the atmosphere, the U.S. Army ARDEC has teamed with TNO in developing a new process for the production of solventless propellant for tank ammunition. To reduce the costs of solventless propellants production, shear roll mill and continuous extrusion processing was investigated. As described in this paper JA-2 a double base propellant cannot be processed without solvent by the extrusion process. An alternative JA-2 equivalent propellant was defined. The aim of this work is to demonstrate the manufacturing of this propellant by solventless continuous twin screw extrusion processing while maintaining gun performance characteristics of conventional JA-2 propellant. This is elucidated by explicitly researching the relationship between interior ballistic properties of the gun propellant and utilizing a continuous manufacturing process. Processing conditions were established, and the propellant was manufactured accordingly. The extruded propellant has the desired properties, which resulted in a comparable gun performance as the conventional JA-2 propellant.

scholarly journals Effect of the Intensive Plasticizing Zone Design on the Effectiveness of Corotating Twin-Screw Extrusion

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Emil Sasimowski ◽  
Łukasz Majewski
Keyword(s):  
Experimental Design ◽  
Rotational Speed ◽  
Extrusion Process ◽  
Empirical Models ◽  
Filling Ratio ◽  
Mixing Zone ◽  
Twin Screw Extrusion ◽  
Screw Extruder ◽  
Screw Extrusion ◽  
Twin Screw

The aim of this study was to investigate the effect of a new intensive plasticizing and mixing screw zone design on the effectiveness of the corotating twin-screw extrusion process for talc-filled polypropylene. The study determined the effect of the angle between the trilobe kneading elements forming the intensive plasticizing and mixing zone of the screws, the screw rotational speed, and the polypropylene/talc filling ratio on the characteristics of the extrusion process in a corotating twin-screw extruder EHP-2x20. The paper describes the experimental design and obtained results as well as the developed empirical models for selected variables of the extrusion process.

Cellulolytic Enzyme Lignin Efficiently Blended with Polycaprolactone: Thermal, Mechanical Properties and Morphological Evaluation

2014 ◽  
Vol 1070-1072 ◽  
pp. 100-106
Author(s):  
Wen Zhu Ouyang ◽  
Yong Huang
Keyword(s):  
Mechanical Properties ◽  
Mechanical Test ◽  
Cellulolytic Enzyme ◽  
Twin Screw Extrusion ◽  
Morphological Evaluation ◽  
Screw Extrusion ◽  
Thermal Mechanical Properties ◽  
Twin Screw ◽  
The Cost ◽  
The Impact

In this study, cellulolytic enzyme lignin (CEL) was blended with polycaprolactone (PCL) by twin-screw extrusion and injection molding. The thermal, mechanical properties and the morphology of the PCL/CEL blends were investigated as a function of CEL content. The results showed that the CEL in the blends acting as nucleus accelerated the crystallization of PCL when CEL was not more than 10 wt%, but retarded PCL to crystallize with more CEL addition. Thermogravimetry analysis (TGA) revealed that the thermal stability of the PCL/CEL blends was almost unaffected by increasing CEL content. Mechanical test showed that, although the elongation at break and the impact strength were decreased, the strength and the modulus of the PCL/CEL blends were significantly higher than those of the neat PCL. Scanning electron microscopy (SEM) observations indicated that the CEL and the PCL were in good miscibility and there was a good adhesion at the interface of the CEL filler and the PCL matrix, suggesting that CEL could be potential filler used in PCL-based materials to reduce the cost of the friendly material, whereas increased its strength and modulus.

Twin Screw Extrusion Processing of Diet for Mass Rearing the Pink Bollworm

1996 ◽  
Vol 39 (5) ◽  
pp. 1789-1797 ◽  
Author(s):  
R. H. Edwards ◽  
E. Miller ◽  
R. Becker ◽  
A. P. Mossman ◽  
D. W. Irving
Keyword(s):  
Mass Rearing ◽  
Pink Bollworm ◽  
Twin Screw Extrusion ◽  
Extrusion Processing ◽  
Screw Extrusion ◽  
Twin Screw
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