The extrusion of polymers below their melting temperatures by the application of high pressures

Buckley, Alan N.; Long, Haibo

doi:10.1002/pen.760090207

Cited by 67 publications

(22 citation statements)

References 8 publications

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“…Detailed studies have been made regarding the pressure in the extruder barrel, [33] the energy, and thermal efficiencies of extrusion processes, [34] extrusion-based additive manufacturing, [35] and the importance of the process settings and screw geometry as touched on above. Similarly, the rheological properties, such as viscosity, elasticity, and hardness of the material being processed, have also been studied in detail in this context.…”

Section: Extrusion In Polymer Manufacturingmentioning

confidence: 99%

Recent Developments in Mechanochemical Materials Synthesis by Extrusion

Crawford¹,

Casabán

2016

Advanced Materials

121

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Mechanochemical synthesis, i.e., reactions conducted by grinding solid reactants together with no or minimal solvent, has been demonstrated as an excellent technique for the formation of both organic and inorganic compounds. Mechanochemistry is viewed as an alternative approach to chemical synthesis and is not always considered when developing manufacturing processes of fine chemicals. Here, recent advances are highlighted regarding mechanochemical synthesis, by utilizing a well-developed continuous technique - extrusion, and the advantages it offers to further support its use in the manufacturing of these chemicals. To put this work into context, it is shown how extrusion plays a vital role for manufacturing in the food, polymer, and pharmaceutical industries, and how the research carried out by these respective industrialists provides great insight and understanding of the technique, with the results being applicable in the chemical industry. The synthesis of metal-organic frameworks (MOFs) is highlighted herein as an excellent example showcasing the advantages that extrusion provides to the manufacture of these materials, one advantage being the exceptional space time yields (STYs) reported for these processes, at three orders of magnitude greater than conventional (solvothermal) synthesis.

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Section: Extrusion In Polymer Manufacturingmentioning

confidence: 99%

Recent Developments in Mechanochemical Materials Synthesis by Extrusion

Crawford¹,

Casabán

2016

Advanced Materials

121

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“…[50][51][52][53][54][55][56][57][58][59][60][61][62][63][64], University of Leeds, England [65][66][67][68][69][70][71][72], Fyushu University, Fukuoka, Japan [73][74][75][76], Research Institute for Polymers and Textiles, Yokohama, Japan [77][78][79], Battelle, Columbus, Ohio [80][81][82][83], and Rutgers University, New Brunswick, New Jersey [84][85][86]. As mentioned earlier, publications from other sources are considerably less plentiful [87][88][89][90]. Efforts have also been made to achieve the same high degree of orientation in a more or less conventional extrusion process by special die design and temperature control in the die region [91].…”

Section: 411solid State Extrusionmentioning

confidence: 99%

Different Types of Extruders

Rauwendaal¹

2014

Polymer Extrusion

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“…(5) and (6) where 00 denotes the extrusion pressure at the entrance of the die hole, and U ( E ) is the additional stress at the exit of the die hole.…”

Section: Y(e) = U(€) -O R ( € )mentioning

confidence: 99%

Plastic Deformation of High Density Polyethylene in Solid State Extrusion

Imada

Takayanagi

1973

International Journal of Polymeric Materials

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An equation describing the process of solid state extrusion of high density polyethylene through a conical die with a taper of 20" was obtained by extending Sachs' equation to apply for polymeric materials which show considerable strain hardening. It was used to estimate theextruding pressure on the basis of the tensile data of the polymer. The agreement between observed and calculated values was satisfactory. Extruded polymers obtained at relatively low extrusion temperature, as low as 80°C, showed elastic after-effects, such as shrinkage at elevated temperatures. However, those extruded at relatively high temperatures, as high as 100"-120"C, showed extraordinary stability in their dimensions even at the temperatures as high as 120°C. Discussions on the basis of the slip line analysis were also made to interpret the discrepancies found between the calculated and observed results when the entrance angle of the die was increased.

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The extrusion of polymers below their melting temperatures by the application of high pressures

Cited by 67 publications

References 8 publications

Recent Developments in Mechanochemical Materials Synthesis by Extrusion

Recent Developments in Mechanochemical Materials Synthesis by Extrusion

Different Types of Extruders

Plastic Deformation of High Density Polyethylene in Solid State Extrusion

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