The optimum glass-polymer ratio in steklocord fiber material

1971 ◽  
Vol 28 (2) ◽  
pp. 97-99 ◽  
Author(s):  
V. S. Rakushin ◽  
E. N. Kudryavtsev ◽  
E. G. Firsanova ◽  
G. A. Sutyrina ◽  
V. A. Teleshov
Keyword(s):  
Fiber Material ◽  
Optimum Glass ◽  
Polymer Ratio

A Multiplexed Optical Fiber Sensor System For Distributed Measurement Of Structural Strains

1997 ◽  
Vol 503 ◽  
Author(s):  
F. Ansari ◽  
Z. Chen ◽  
Q. Li
Keyword(s):  
Optical Fiber ◽  
Optical Switch ◽  
Optical Fiber Sensor ◽  
Fiber Material ◽  
Smart Structure ◽  
Sensor System ◽  
Fiber Sensor ◽  
Fiber Sensors ◽  
Large Structures ◽  
Distributed Measurement

ABSTRACTStructurally integrated optical fiber sensors form the basis for smart structure technology. Over the past decade a variety of sensor configurations have been developed for measurement of strains and deformations in structures. Strains and deformations alter the refractive index and the geometry of the optical fiber material. These changes perturb the intensity, phase, and polarization of the light-wave propagating along the probing fiber. The optical perturbations are detected for the determination of strain. The research presented here describes the development of a new optical fiber sensor system for measurement of structural strains based on white light interferometry. An optical switch provides for multiplexing of strain signals from various locations in the structure. Redundant Bragg grating type fiber optic sensors as well as strain gauges were employed for comparison and verification of strain signals as measured by the new system. The system provides capability for distributed sensing of strains in large structures.

scholarly journals Testing of yarn abrasion

2013 ◽  
Vol 13 (1) ◽  
pp. 22-27
Author(s):  
G. Krupincová ◽  
J. Hatipoglu
Keyword(s):  
Abrasion Resistance ◽  
Fiber Material ◽  
Experimental Results ◽  
Mechanical Parameters ◽  
Yarn Quality ◽  
Material Characteristics ◽  
Quality Testing

Abstract There exist a lot of methodologies, which can be used for yarn quality testing. Abrasion resistance and its measurement for raw and sized yarn can help in the judgment of yarn weaving-ability. This article concentrates on the possibility of yarn abrasion expression and testing. Relation among fiber material characteristics, selected yarn structural, and mechanical parameters is discussed and a few experimental results are shown.

Mechanoradical formation and its effects on birch kraft pulp during the preparation of nanofibrillated cellulose with Masuko refining

Holzforschung ◽  
2012 ◽  
Vol 66 (4) ◽  
Author(s):  
Iina Solala ◽  
Aleksander Volperts ◽  
Anna Andersone ◽  
Tatiana Dizhbite ◽  
Nina Mironova-Ulmane ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance Spectroscopy ◽  
Fiber Material ◽  
Nanofibrillated Cellulose ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Pulp Viscosity ◽  
Antioxidant Characteristics ◽  
Birch Kraft Pulp ◽  
Recombination Reactions

AbstractMasuko refining of unbleached kraft birch pulp has been noted to result in more thorough fibrillation than the refining of its bleached counterpart. This result is observed through different fractionation behavior of once refined pulps and is further supported by different relative changes in pulp viscosity. The formation of mechanoradicals during refining is observed with electron paramagnetic resonance spectroscopy, and the role of lignin and hemicelluloses [quantified using kappa number determination and UV resonance Raman (UVRR) spectroscopy] in the progress of refining is discussed. Lignin, a known antioxidant, is capable of stabilizing radicals, which could potentially counteract recombination reactions between highly reactive cellulose radicals. On the other hand, lignin’s ability to promote fibrillation could also lie in its amorphous nature and not solely in its antioxidant characteristics. Furthermore, bleaching removes not only lignin but also hemicelluloses, which affects both the charge density and the structure of the fiber material, and this is another likely contributor to the easier fibrillation of lignin-containing pulps.

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