Study of Modification of R-PP Foamability by Blending with PDMS

2011 ◽  
Vol 211-212 ◽  
pp. 550-554
Author(s):  
Ming Yi Wang ◽  
Lian Qing Ji ◽  
Jun Ma ◽  
Nan Qiao Zhou ◽  
Chul B. Park
Keyword(s):  
Carbon Dioxide ◽  
Population Density ◽  
Supercritical Carbon Dioxide ◽  
Cell Population ◽  
Expansion Ratio ◽  
Experimental Results ◽  
Blowing Agent ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Screw Extrusion

The effect of PDMS on foamability of R-PP was investigated using a single screw extrusion foaming system, with supercritical carbon dioxide as the blowing agent. Experimental results indicate that the addition of a small amount of PDMS will improve expansion ratio of R-PP foamed samples. Furthermore, compared with pure R-PP, cell-population density of foamed samples obtained from R-PP/PP-g-MAH/PDMS blends was obviously higher than that of pure R-PP foams.The experimental results show that blending with PDMS is beneficial for improving foaming performance of R-PP.

scholarly journals Natural Fibre-Reinforced Biofoams

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Anne Bergeret ◽  
Jean Charles Benezet
Keyword(s):  
Mechanical Properties ◽  
Cellulose Fibre ◽  
Fibre Surface ◽  
Natural Fibre ◽  
Void Content ◽  
Blowing Agent ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Density Reduction ◽  
Screw Extrusion

Starches and polylactic acids (PLAs) represent the main biobased and biodegradable polymers with potential industrial availability in the next decades for “bio” foams applications. This paper investigates the improvement of their morphology and properties through processing and materials parameters. Starch foams were obtained by melt extrusion in which water is used as blowing agent. The incorporation of natural fibres (hemp, cellulose, cotton linter, sugarcane, coconut) in the starch foam induced a density reduction up to 33%, a decrease in water absorption, and an increase in mechanical properties according to the fibre content and nature. PLA foams were obtained through single-screw extrusion using of a chemical blowing agent that decomposed at the PLA melting temperature. A void content of 48% for PLA and 25% for cellulose fibre-reinforced PLA foams and an improvement in mechanical properties were achieved. The influence of a fibre surface treatment was investigated for both foams.

scholarly journals Physical and Microstructure Properties of Oyster Mushroom-Soy Protein Meat Analog via Single-Screw Extrusion

Foods ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1023
Author(s):  
Mazween Mohamad Mazlan ◽  
Rosnita A. Talib ◽  
Nyuk Ling Chin ◽  
Radhiah Shukri ◽  
Farah Saleena Taip ◽  
...  
Keyword(s):  
Soy Protein ◽  
Expansion Ratio ◽  
Oyster Mushroom ◽  
Low Grade ◽  
Screw Speed ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Screw Extrusion ◽  
Meat Analog ◽  
Content Range

Single-screw extrusion of a fibrous-structured meat analog from soy proteins added with low-grade oyster mushroom was successful. Satisfactory extrudates were obtained at a barrel temperature of 140 °C, screw speed range of 100–160 rpm, and oyster mushroom addition at 0%, 7.5%, and 15% via factorial experiments. Single-screw extrusion equipped with a slit die successfully produced expanded oyster mushroom-soy protein extrudates. However, the increase in the oyster mushroom content significantly decreased (p ≤ 0.05) the expansion ratio of the extrudate from 1.26 to 0.98. This result indicated that adding more oyster mushroom restrained the expansion ratio. The extrudates had a medium density range (max of 1393.70 ± 6.30 kg/m3). By adding oyster mushroom, the extrudates attained a higher moisture content (range = 34.77% to 37.93%) compared with the extrudates containing the protein mixture only (range = 26.99% to 32.33%). The increase in screw speed and oyster mushroom significantly increased (p ≤ 0.05) the water absorption index. The increase in the texturization index was significantly influenced (p ≤ 0.05) by oyster mushroom addition rather than the screw speed. A defined fibrous structure supported the high texturization index and small shape of air cells observed in the extrudates.

Computer Flow Simulation of Moffatt Eddies in Single Screw Extrusion

2018 ◽  
Vol 33 (5) ◽  
pp. 662-668 ◽  
Author(s):  
N. D. Polychronopoulos ◽  
J. Vlachopoulos
Keyword(s):  
Flow Simulation ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Screw Extrusion

Single screw extrusion of apple pomace-enriched blends: Extrudate characteristics and determination of optimum processing conditions

2018 ◽  
Vol 24 (5) ◽  
pp. 447-462 ◽  
Author(s):  
Poonam Singha ◽  
Kasiviswanathan Muthukumarappan
Keyword(s):  
Moisture Content ◽  
Apple Pomace ◽  
Soy Flour ◽  
Total Phenolic ◽  
Screw Speed ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Screw Extrusion ◽  
Feed Moisture ◽  
Die Temperature

Response surface methodology was used to investigate the single screw extrusion of apple pomace–defatted soy flour–corn grits blends and the product properties. Five different blends at a level of 0–20% w/w apple pomace were extrusion cooked with varied barrel and die temperature (100–140℃), screw speed (100–200 rpm), and feed moisture content (14–20% wet basis). Increasing apple pomace content in the blends significantly ( P < 0.05) increased the bulk density, the total phenolic content, and the antioxidant activity of the extrudates. The expansion ratio increased with pomace inclusion level of 5% but decreased significantly ( P < 0.05) at higher levels of pomace inclusion (10–20%). Moisture content had quadratic influence on water absorption and solubility indices. Optimal extrusion cooking conditions most likely to produce apple pomace-enriched extruded snack products were at 140℃ barrel and die temperature, 20% feed moisture content, and 200 rpm screw speed. The results indicated active interaction between apple pomace and starch during expansion process.

Thermoplastic starch and glutaraldehyde modified thermoplastic starch foams prepared using supercritical carbon dioxide fluid as a blowing agent

2018 ◽  
Vol 29 (10) ◽  
pp. 2643-2654 ◽  
Author(s):  
Jia-li Peng ◽  
Xuan-long Peng ◽  
James Runt ◽  
Chao-ming Huang ◽  
Kuo-shien Huang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Thermoplastic Starch ◽  
Blowing Agent ◽  
Starch Foams ◽  
Supercritical Carbon

The Incumbent Resin Effect for Single-Screw Extrusion of PE Resins

2016 ◽  
Vol 72 (5) ◽  
pp. 28-31
Author(s):  
Mark A. Spalding ◽  
Qian Gou ◽  
Xiaofei Sun ◽  
Qing Shi
Keyword(s):  
Single Screw ◽  
Single Screw Extrusion ◽  
Screw Extrusion
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