Molecular theory for the viscoelasticity of compatible polymer mixtures. 2. Tube model with reptation and constraint release contributions

1989 ◽  
Vol 22 (11) ◽  
pp. 4292-4302 ◽  
Author(s):  
Chang Dae Han ◽  
Jin Kon Kim
Keyword(s):  
Molecular Theory ◽  
Tube Model ◽  
Polymer Mixtures ◽  
Constraint Release

Specific volume and features of compressibility during the molding of powder-polymer mixtures with wax-polypropylene binder

2019 ◽  
pp. 25-33
Author(s):  
Alexander Muranov ◽  
Alexey Semenov ◽  
Anatoly Kutsbakh ◽  
Boris Semenov
Keyword(s):  
Phase Transition ◽  
Comparative Analysis ◽  
Powder Metallurgy ◽  
Injection Molding ◽  
Polymer Binder ◽  
Polymer Mixture ◽  
Powder Injection ◽  
Polymer Mixtures ◽  
Pvt Data ◽  
Mathematical Processing

The article discusses one of the modern areas of powder metallurgy – the technology of manufacturing shaped parts by the powder injection molding (PIM). For the powder-polymer mixture (feedstock) with a wax-polypropylene binder of the solvent-thermal type of removal by isobaric volume dilatometry, the dependence of PVT state parameters was studied. For each component of the polymer binder, the dependence of pressure on the temperature of phase transition was obtained. As a result of mathematical processing and analysis of PVT data for the feedstock of the studied type, a technological window of parameters has been determined that allows injection molding of «green parts» with minimal volume shrinkage. The results of a comparative analysis of the compaction of feedstock with a polymer binder catalytic and solution-thermal type of removal are presented.

Molecular theory of the constraint-breaking pseudoscalar (axion) in antiferromagnetic Cr2O3

2014 ◽  
Vol 378 (22-23) ◽  
pp. 1593-1597 ◽  
Author(s):  
O.L. de Lange ◽  
R.E. Raab
Keyword(s):  
Molecular Theory
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