Pressure and molecular-weight dependences of elastic properties of polystyrene polymers studied by Brillouin spectroscopy

2017 ◽  
Vol 17 (11) ◽  
pp. 1396-1400 ◽  
Author(s):  
Byoung Wan Lee ◽  
Min-Seok Jeong ◽  
Jong Sun Choi ◽  
Jaehoon Park ◽  
Young Ho Ko ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Elastic Properties ◽  
Brillouin Spectroscopy

Relation between Molecular Weights and Physical Properties of Rubber Fractions

1941 ◽  
Vol 14 (3) ◽  
pp. 580-589 ◽  
Author(s):  
G. Gee ◽  
L. R. G. Treloar
Keyword(s):  
Molecular Weight ◽  
Natural Rubber ◽  
Physical Properties ◽  
High Molecular Weight ◽  
Elastic Properties ◽  
Elastic Material ◽  
Experimental Results ◽  
Molecular Weights ◽  
High Elasticity ◽  
Latex Rubber

Abstract As high elasticity is a property possessed only by substances of high molecular weight, it is of interest to enquire into the relation between the elastic properties of a highly elastic material such as rubber and its molecular weight. An investigation on these lines has been made possible through the work of Bloomfield and Farmer, who have succeeded in separating natural rubber into fractions having different average molecular weights. The more important physical properties of these fractions have been examined with the object of determining which of the properties are dependent on molecular weight and which are not. Fairly extensive observations were made on the fractions from latex rubber referred to as Nos. 2, 3 and 4 by Bloomfield and Farmer, and some less extensive observations were carried out on the less oxygenated portion of fraction No. 1 obtained from crepe rubber (called hereafter 1b) . Before considering these experimental results, and their relation to the molecular weights of the fractions, it will be necessary to refer briefly to the methods used for the molecular-weight determinations, and to discuss the significance of the figures obtained.

Elastic properties of Na+ β″-alumina measured by brillouin spectroscopy

1989 ◽  
Vol 70 (1) ◽  
pp. 15-18 ◽  
Author(s):  
Sukmock Lee ◽  
B. Hillebrands ◽  
G.I. Stegeman ◽  
B. Dunn ◽  
L.A. Momoda ◽  
...  
Keyword(s):  
Elastic Properties ◽  
Brillouin Spectroscopy

Elastic properties of tetragonal KH2PO4by high-pressure brillouin spectroscopy

1998 ◽  
Vol 217 (1) ◽  
pp. 113-120
Author(s):  
S. Sasaki ◽  
F. Nakashima ◽  
H. Shimizu
Keyword(s):  
High Pressure ◽  
Elastic Properties ◽  
Brillouin Spectroscopy

Temperature and molecular-weight dependences of acoustic behaviors of polystyrene studied using Brillouin spectroscopy

2017 ◽  
Vol 70 (8) ◽  
pp. 791-795 ◽  
Author(s):  
Soo Han Oh ◽  
Byoung Wan Lee ◽  
Jae-Hyeon Ko ◽  
Hyeonju Lee ◽  
Jaehoon Park ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Brillouin Spectroscopy

Elastic properties of KY(WO4)2 single crystals studied by Brillouin spectroscopy

2010 ◽  
Vol 492 (1-2) ◽  
pp. 671-674 ◽  
Author(s):  
D. Kasprowicz ◽  
A. Trzaskowska ◽  
A. Majchrowski ◽  
E. Michalski ◽  
S. Mielcarek
Keyword(s):  
Single Crystals ◽  
Elastic Properties ◽  
Brillouin Spectroscopy

scholarly journals Elastic Properties of Methane Hydrate Studied by High-Pressure Brillouin Spectroscopy.

2002 ◽  
Vol 12 (1) ◽  
pp. 16-21
Author(s):  
Shigeo SASAKI ◽  
Tatsuya KUMAZAKI ◽  
Tetsuji KUME ◽  
Hiroyasu SHIMIZU
Keyword(s):  
High Pressure ◽  
Elastic Properties ◽  
Methane Hydrate ◽  
Brillouin Spectroscopy

THE ELASTIC FIBER A REVIEW

1973 ◽  
Vol 21 (3) ◽  
pp. 199-208 ◽  
Author(s):  
RUSSELL ROSS
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Elastic Properties ◽  
Lysyl Oxidase ◽  
Elastic Fiber ◽  
Net Charge ◽  
Amorphous Component ◽  
Cross Links

A number of important questions remain to be answered concerning our understanding of elastic tissues. The size and molecular weight of the elastin precursor remains to be clearly established. The number of proteins involved in the microfibrillar component of the elastic fiber are as yet undetermined, although it would appear that they are glycoproteins that may represent a species of reasonably high molecular weight. Clearly the elastic fiber contains two morphologic components. During morphogenesis, the elastic fiber begins to appear in the form of aggregates of microfibrils that take the shape and direction of the presumptive elastic fiber. With increasing maturity elastin begins to form within the interstices of each bundle of microfibrils. By the time the elastic fiber is fully formed it consists largely of the amorphous component, elastin, surrounded by an envelope of microfibrils with microfibrils embedded within its interstices. It has been suggested that the microfibrils form and take their shape extracellularly under the influence of the cells that have secreted their precursors. After the aggregates of microfibrils have taken their shape Ross and Bornstein (22) have suggested that the elastin may interact ionically with the surface of the microfibrils, since each of these two components has an opposite net charge, and may be held in position while desmosine cross-links are established through the action of the enzyme, lysyl oxidase. Thus the microfibrils would serve as a scaffolding to determine morphogenetically the shape and direction to be later taken by the mature elastic fiber. The reason for the elastic properties of the elastin is still yet poorly understood, and the means by which the cells synthesize and secrete both of these components remain to be investigated.

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