Linear viscoelastic characteristics of in situ compatiblized binary polymer blends with viscoelastic properties of components variable

2010 ◽  
Vol 48 (12) ◽  
pp. 1349-1362 ◽  
Author(s):  
Jingqing Li ◽  
Guiqiu Ma ◽  
Jing Sheng
Keyword(s):  
Polymer Blends ◽  
Viscoelastic Properties ◽  
Binary Polymer ◽  
Linear Viscoelastic ◽  
Viscoelastic Characteristics

Morphological Aspects of In-Situ Compatiblized Binary Polymer Blends With Variable Viscosity Ratios of Components

2009 ◽  
Vol 48 (3) ◽  
pp. 471-486 ◽  
Author(s):  
Jingqing Li ◽  
Guiqiu Ma ◽  
Jing Sheng
Keyword(s):  
Polymer Blends ◽  
Variable Viscosity ◽  
Morphological Aspects ◽  
Binary Polymer

In-Situ Alloying Dynamics and Phase Morphology of Binary Polymer Blends

2014 ◽  
Vol 67 (1) ◽  
pp. 93
Author(s):  
Jing-qing Li ◽  
Gui-qiu Ma ◽  
Xu-bo Yuan ◽  
Jing Sheng
Keyword(s):  
Polymer Blends ◽  
Transition Layer ◽  
Rayleigh Scattering ◽  
Volume Fraction ◽  
Structural Parameters ◽  
Binary Polymer ◽  
Phase Size ◽  
Compatibilization Effect ◽  
Two Phases

In-situ alloying of polypropylene (PP)/polystyrene (PS) binary polymer blends using anhydrous aluminum chloride as a catalyst was investigated by small angle light scattering. The phase structures, morphology, and compatibilization effect in the obtained alloys during the in-situ alloying process were investigated by Rayleigh scattering. The content of compatible domains between the two phases of PP and PS in the in-situ alloys, i.e. the volume fraction of the interfacial transition layer, and the ‘invariant’ of the alloys were first calculated to describe the in-situ alloying dynamics, which reveals that the resulting in-situ PP/PS alloys are partially compatible. The relationship between the volume fraction of the interfacial transition layer or ‘invariant’ and the in-situ alloying reactive conditions are discussed in detail. The phase structural parameters, including correlation distance and average chord lengths, were calculated to characterize the phase size evolutions of the in-situ alloys, confirming the validity of using the volume fraction of the interfacial transition layer or ‘invariant’ to investigate the in-situ alloying dynamics.

Phase Structure Characterization by SALS of In Situ Compatiblized Binary Polymer Blends and Its Relation to Rheology

2011 ◽  
Vol 50 (4) ◽  
pp. 741-761 ◽  
Author(s):  
Jingqing Li ◽  
Guiqiu Ma ◽  
Jing Sheng
Keyword(s):  
Polymer Blends ◽  
Phase Structure ◽  
Structure Characterization ◽  
Binary Polymer

scholarly journals The application of blending law on linear viscoelastic properties of linear–star and star–star polymer blends

2000 ◽  
Vol 36 (1) ◽  
pp. 101-109 ◽  
Author(s):  
Wen-Bin Liau ◽  
Jeng-Shrong Uen ◽  
Wen-Yen Chiu
Keyword(s):  
Polymer Blends ◽  
Viscoelastic Properties ◽  
Star Polymer ◽  
Linear Viscoelastic

Investigation of the viscoelastic properties of binary polymer blends

1978 ◽  
Vol 20 (4) ◽  
pp. 875-882
Author(s):  
Yu.S. Lipatov ◽  
V.V. Shifrin ◽  
V.F. Rosovitskii
Keyword(s):  
Polymer Blends ◽  
Viscoelastic Properties ◽  
Binary Polymer

Ethylene-propylene-rubber (EPR)/polydimethylsiloxane (PDMS) binary polymer blends: Morphology and viscoelastic properties

2004 ◽  
Vol 94 (5) ◽  
pp. 2240-2249 ◽  
Author(s):  
M. Carlberg ◽  
D. Colombini ◽  
F. H. J. Maurer
Keyword(s):  
Polymer Blends ◽  
Viscoelastic Properties ◽  
Ethylene Propylene ◽  
Binary Polymer ◽  
Ethylene Propylene Rubber

The influence of osteopathic correction on the viscoelastic characteristics of the lower leg muscles

2019 ◽  
pp. 93-98
Author(s):  
E. M. Timanin ◽  
N. S. Sydneva ◽  
A. A. Zakharova
Keyword(s):  
Viscoelastic Properties ◽  
Gastrocnemius Muscle ◽  
Soft Tissues ◽  
Subjective Assessment ◽  
Lymphatic Drainage ◽  
Intercellular Substance ◽  
Leg Muscles ◽  
Before And After ◽  
Viscoelastic Characteristics ◽  
Instrumental Methods

Introduction. To date there is a lack of studies dedicated to the objectification of the palpation data obtained by a specialist during the osteopathic examination. The issue of the evidence of the results of osteopathic correction still remains important. Search for instrumental methods allowing to register and to measure various palpation phenomena and manifestations of somatic dysfunctions is very relevant for the development of osteopathy as a science. It is also very important to find objective characteristics of these methods.Goal of research — to study viscoelastic characteristics of the soft tissues of the lower legs by palpation and instrumental methods before and after osteopathic correction.Materials and methods. 22 volunteers (12 women and 10 men) aged 18–23 years without complaints of the musculoskeletal system were examined. Osteopathic diagnostics and measurement of the viscoelastic properties of muscles were carried out by the method of vibration viscoelastometry before and after osteopathic correction.Results. Correlation analysis by Spearman showed that the subjective assessment of an osteopath positively correlated with both elasticity (r=0,43, p<0,05) and viscosity of soft issues (r=0,29, p<0,05). For the gastrocnemius muscle, this pattern was even more pronounced — for elasticity r=0,51, p<0,05, for viscosity =0,34, p<0,05. After osteopathic correction no changes in the elasticity of the soft tissues were observed. The viscosity of the tissues reduced, but in the projection of the gastrocnemius muscle, these changes were not statistically significant (p=0,12), whereas in the projection of the soleus muscle statistically significant changes (p=0,034) were observed.Conclusion. Changes in the viscoelastic properties of tissues demonstrated that the effects of osteopathic correction with the use of myofascial mobilization techniques, articulation mobilization techniques, and lymphatic drainage techniques were not obvious. The elasticity of soft tissues of the lower legs did not change, while the viscosity decreased, especially in the projection of the soleus muscles. This effect of the osteopathic correction can be associated with the effect of thixotropy — the transformation of gel-like intercellular substance into sol. Thus, the research showed that vibration viscoelastometry can be used for the objectifi cation of the condition of soft tissues and of the effects of osteopathic correction.

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