Determination of Specific Mechanical Energy Distribution on a Twin-Screw Extruder

1997 ◽  
Vol 67 (4) ◽  
pp. 277-287 ◽  
Author(s):  
S Godavarti ◽  
MV Karwe
Keyword(s):  
Energy Distribution ◽  
Mechanical Energy ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Specific Mechanical Energy

Waxy flour degradation – Impact of screw geometry and specific mechanical energy in a co-rotating twin screw extruder

2018 ◽  
Vol 239 ◽  
pp. 688-696 ◽  
Author(s):  
Ryan J. Kowalski ◽  
Jacob P. Hause ◽  
Helen Joyner (Melito) ◽  
Girish M. Ganjyal
Keyword(s):  
Mechanical Energy ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Specific Mechanical Energy

Properties of EPDM/PP thermoplastic vulcanizates produced by an intermeshing-type internal mixer comparing with a co-rotating twin-screw extruder

2019 ◽  
Vol 39 (2) ◽  
pp. 143-151
Author(s):  
Wattana Teppinta ◽  
Banja Junhasavasdikul ◽  
Nattapong Nithi-Uthai
Keyword(s):  
Shear Rate ◽  
Elastic Recovery ◽  
Mechanical Energy ◽  
Cross Linking ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Lower Shear ◽  
Twin Screw ◽  
Lower Shear Rate ◽  
Internal Mixer

Abstract A unique technology for producing thermoplastic vulcanizate (TPV) has been developed using an intermeshing-type internal mixer (ITM). TPV produced by the ITM was compared with that produced using a co-rotating twin screw extruder (Co-TSE) to assess the former’s commercial possibilities. TPV, originating from ethylene-propylene-diene monomer (EPDM) and polypropylene (PP), was produced by both machines with equal filled volumes, same shear rate, and same specific mechanical energy. Results indicate that ITMs can be used to produce TPV with mechanical properties comparable to those of TPV produced by Co-TSE. TPV can be produced with a lower shear rate with ITM compared to Co-TSE. A long residence time can be maintained in the mixing chamber of the ITM, allowing high conversion of the cross-linking reaction and resulting in better elastic recovery properties due to the higher cross-linking density. However, this resulted in higher viscosity of TPV produced by ITM.

scholarly journals Determination of the degree of fill in a counter-rotating twin screw extruder

1998 ◽  
Vol 38 (7) ◽  
pp. 1193-1198 ◽  
Author(s):  
A. J. Van Der Goot ◽  
O. Poorter ◽  
L. P. B. M. Janssen
Keyword(s):  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw

Determination of the phase structure of polymerblends by electron microscopy

1978 ◽  
Vol 36 (1) ◽  
pp. 492-493
Author(s):  
Dr. G. Kaemof
Keyword(s):  
Screw Extruder ◽  
Electron Microscopic ◽  
Thin Sections ◽  
Single Screw Extruder ◽  
Transmission Electron ◽  
The Matrix ◽  
Twin Screw ◽  
Special Case ◽  
Microscopic Investigations

A mixture of polycarbonate (PC) and styrene-acrylonitrile-copolymer (SAN) represents a very good example for the efficiency of electron microscopic investigations concerning the determination of optimum production procedures for high grade product properties.The following parameters have been varied:components of charge (PC : SAN 50 : 50, 60 : 40, 70 : 30), kind of compounding machine (single screw extruder, twin screw extruder, discontinuous kneader), mass-temperature (lowest and highest possible temperature).The transmission electron microscopic investigations (TEM) were carried out on ultra thin sections, the PC-phase of which was selectively etched by triethylamine.The phase transition (matrix to disperse phase) does not occur - as might be expected - at a PC to SAN ratio of 50 : 50, but at a ratio of 65 : 35. Our results show that the matrix is preferably formed by the components with the lower melting viscosity (in this special case SAN), even at concentrations of less than 50 %.

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