Segmental and terminal dynamics in miscible polymer mixtures: Tests of the Lodge–McLeish model

2003 ◽  
Vol 119 (18) ◽  
pp. 9956-9965 ◽  
Author(s):  
Yiyong He ◽  
T. R. Lutz ◽  
M. D. Ediger
Keyword(s):  
Polymer Mixtures ◽  
Terminal Dynamics

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.

scholarly journals Manufacturing PLA/PCL Blends by Ultrasonic Molding Technology

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2412
Author(s):  
Inés Ferrer ◽  
Ariadna Manresa ◽  
José Alberto Méndez ◽  
Marc Delgado-Aguilar ◽  
Maria Luisa Garcia-Romeu
Keyword(s):  
Molecular Weight ◽  
Crystallization Rate ◽  
Raw Material ◽  
Small Particle Size ◽  
Polymer Mixtures ◽  
Crystallinity Degree ◽  
Correct Determination ◽  
Production Stages ◽  
Process Speed

Ultrasonic molding (USM) is a good candidate for studying the plasticization of polymer mixtures or other composite materials due to either the little amount of material needed for processing, low waste or the needed low pressure and residence time of the mold. Thus, the novelty of this research is the capability of USM technology to process PLA/PCL blends and their corresponding neat materials, encompassing all the production stages, from raw material to the final specimen. The major findings of the work revealed that the thermal properties of the blends were not affected by the USM process, although the crystallinity degree experienced variations, decreasing for PLA and increasing for PCL, which was attributed to the crystallization rate of each polymer, the high process speed, the short cooling time and the small particle size. The employed ultrasonic energy increased the molecular weight with low variations through the specimen. However, the degradation results aligned with the expected trend of these material blends. Moreover, this study also showed the effect pellet shape and dimensions have over the process parameters, as well as the effect of the blend composition. It can be concluded that USM is a technology suitable to successfully process PLA/PCL blends with the correct determination of process parameter windows.

Role of compatibilizer in multicomponent polymer mixtures under shear flow

Soft Matter ◽  
2013 ◽  
Vol 9 (1) ◽  
pp. 255-260 ◽  
Author(s):  
Ruohai Guo ◽  
Jialin Li ◽  
Li-Tang Yan ◽  
Xu-Ming Xie
Keyword(s):  
Shear Flow ◽  
Polymer Mixtures ◽  
Multicomponent Polymer

scholarly journals Ultrasoft Colloid-Polymer Mixtures: Structure and Phase Diagram

2011 ◽  
Vol 106 (22) ◽  
Author(s):  
B. Lonetti ◽  
M. Camargo ◽  
J. Stellbrink ◽  
C. N. Likos ◽  
E. Zaccarelli ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Polymer Mixtures

scholarly journals Association behavior of binary polymer mixtures under elongational flow

2000 ◽  
Vol 113 (11) ◽  
pp. 4814-4826 ◽  
Author(s):  
Elena E. Dormidontova ◽  
Gerrit ten Brinke
Keyword(s):  
Elongational Flow ◽  
Polymer Mixtures ◽  
Binary Polymer ◽  
Association Behavior

scholarly journals Phase Behavior of Magnetic Colloid−Polymer Mixtures:  1. Mean Field Calculations

Langmuir ◽  
2002 ◽  
Vol 18 (2) ◽  
pp. 377-381 ◽  
Author(s):  
G. A. van Ewijk ◽  
G. J. Vroege
Keyword(s):  
Phase Behavior ◽  
Mean Field ◽  
Polymer Mixtures
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