Effect of Ti+, Ar+, N+ and He+ Ion Implantation on Aramid Fiber Adhesive Properties

1989 ◽  
Vol 170 ◽  
Author(s):  
J. Kalantar ◽  
D. S. Grummon ◽  
L. T. Drzal ◽  
I. H. Loh ◽  
R. A. Moody
Keyword(s):  
High Performance ◽  
Weak Interactions ◽  
Polymer Fibers ◽  
Environmental Stability ◽  
Adhesive Properties ◽  
Matrix Adhesion ◽  
High Performance Polymer ◽  
Reinforcement Fiber ◽  
Fiber Matrix ◽  
High Degree

AbstractComposites made with high performance polymer fibers can achieve axial properties comparable to those which use inorganic reinforcements, but with somewhat inferior interfacial properties. A high degree of chain alignment in polyaramids, such as Kevlar, produces weak interactions between adjacent polymers, resulting in poor transverse strength in the fiber, and low interfacial shear strength in composite systems. The latter controls many composite properties, such as transverse, shear and flexural strengths. Also, by reducing the tendency to form weak interfacial boundary layers, good fiber-matrix adhesion can enhance environmental stability. For these reasons, modifications to reinforcement fiber surfaces that promote fiber-matrix adhesion are frequently used to improve the performance of composites.

The Prime Importance of Second-Order Effects in Rigid-Rod Polymers

1988 ◽  
Vol 134 ◽  
Author(s):  
Steven J. Deteresa ◽  
Richard J. Farris
Keyword(s):  
Compressive Stress ◽  
High Performance ◽  
Second Order ◽  
Shear Instability ◽  
Polymer Fibers ◽  
Order Effects ◽  
Axial Tensile ◽  
High Performance Polymer ◽  
Rigid Rod ◽  
Axial Compressive Stress

ABSTRACTThe torsion modulus of high performance rigid-rod polymer fibers is shown to be dependent on axial tensile stress. This behavior is one of at least second-order elasticity. Fiber ultimate tensile strengths are of the same magnitude as torsion moduli, and increases in torsion moduli in excess of 200% were observed for fibers under tension. Consideration of the effect of an axial compressive stress on fiber torsion modulus leads to a prediction of an elastic shear instability that initiates at a compressive stress approximately equal in magnitude to the zero-stress torsion modulus. Hence, it is concluded that the compressive strengths of high performance polymer fibers are limited by the onset of an elastic microstructural instability.

scholarly journals Surface Activation of High Performance Polymer Fibers: A Review

2022 ◽  
pp. 1-32
Author(s):  
Carolin Gleissner ◽  
Justus Landsiedel ◽  
Thomas Bechtold ◽  
Tung Pham
Keyword(s):  
High Performance ◽  
Polymer Fibers ◽  
Surface Activation ◽  
High Performance Polymer

scholarly journals Functional Coatings on High‐Performance Polymer Fibers for Smart Sensing

2020 ◽  
Vol 30 (14) ◽  
pp. 1910555 ◽  
Author(s):  
Henning Galinski ◽  
Daniel Leutenegger ◽  
Martin Amberg ◽  
Fabio Krogh ◽  
Volker Schnabel ◽  
...  
Keyword(s):  
High Performance ◽  
Polymer Fibers ◽  
Functional Coatings ◽  
High Performance Polymer ◽  
Smart Sensing

A Comparative Experimental Study on Tensile Properties of Three Types of High-Performance Polymer Fibers

2011 ◽  
Author(s):  
X.-L. Gao ◽  
S.-S. Zhou ◽  
S. E. Bosselman ◽  
J. Q. Zheng
Keyword(s):  
Experimental Study ◽  
Elastic Modulus ◽  
Tensile Properties ◽  
High Performance ◽  
Tensile Tests ◽  
Polymer Fibers ◽  
Breaking Stress ◽  
Strong Temperature Dependence ◽  
Breaking Strain ◽  
High Performance Polymer

A comparative experimental study on tensile properties of three types of high-performance polymeric fiber yarns — AuTx™, Kevlar® KM2 600 denier and Twaron® 500 denier — is conducted. Tensile tests are performed on samples of the three kinds of fiber yarns at five testing temperatures (24, 50, 60, 70 and 80 °C) and three loading rates (100, 200 and 300 mm/min). The elastic modulus, breaking stress, and breaking strain are obtained for each type of fiber yarns under specified testing conditions as averages of measured values from 15 specimens. The experimental data reveal that the tensile properties of all three types of fiber yarns under investigation exhibit strong temperature dependence, with the elastic modulus and breaking stress decreasing with the temperature increase. However, the dependency of the properties on the loading rate is insignificant for the range considered. The measured tensile properties of the Kevlar® and Twaron® yarns are seen to be close, while the elastic modulus and breaking stress of the AuTx™ yarn are found to be, respectively, about 12% and 40% higher than those of the Kevlar® and Twaron® fiber yarns. It is also observed that the AuTx™ yarn degrades about two times faster than the other two yarns as temperature increases.

Comparison of Two Evaluating Methods for Establishing the Marginal Fit on Four Heat - Pressed Resin Inlays

2018 ◽  
Vol 69 (4) ◽  
pp. 890-893
Author(s):  
Sorana Baciu ◽  
Cristian Berece ◽  
Adrian Florea ◽  
Andrada Voina Tonea ◽  
Ondine Lucaciu ◽  
...  
Keyword(s):  
High Performance ◽  
Clinical Results ◽  
Marginal Fit ◽  
High Performance Polymer ◽  
Investigation Methods ◽  
Evaluating Methods

In this study were compared two investigation methods, a bi- and tri-dimensional techniques by examining the marginal fit pressed in (BioHPP) Inlays. The study pruved that the BioHPP is a high performance polymer which provides very good clinical results.

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