Evaluation of the Effect of a Custom Fiber Surface Treatment on the Adhesion Level in a Polymer-Based Composite Using the Single Fiber Fragmentation Test

2000 ◽  
Vol 22 (2) ◽  
pp. 53
Author(s):  
WS Johnson ◽  
JE Masters ◽  
DW Wilson ◽  
D Bradford ◽  
K Lease ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Fiber Surface ◽  
Single Fiber ◽  
Fragmentation Test ◽  
Fiber Fragmentation ◽  
Adhesion Level ◽  
Fiber Surface Treatment

Study on 2-D Multi-Fiber Arrange Model Composites

2005 ◽  
Vol 297-300 ◽  
pp. 219-224
Author(s):  
Chang Kwon Moon ◽  
Ki Woo Nam
Keyword(s):  
Shear Strength ◽  
Surface Treatment ◽  
Interfacial Shear Strength ◽  
Fiber Surface ◽  
Interfacial Properties ◽  
Interfacial Shear ◽  
Two Dimensional ◽  
Fragmentation Test ◽  
Fiber Fragmentation ◽  
Fiber Surface Treatment

The effect of interfiber distance on the interfacial properties in two dimensional multi-Eglass fiber/epoxy resin composites has been investigated using fragmentation test. In additions, the effect of the fiber surface treatment on the interfacial properties has been studied. We found that the interfacial shear strength decreased with the decreasing of the interfiber distance at the range of under 50µm and the extent of the decreasing was more serious as the increasing of the number of adjacent fiber. This is probably that the interface between the fiber and the resin was damaged by the adjacent fiber breaks and the damage increased with closing the interfiber spacing and the number of adjacent fiber. We can guess from this interfacial shear strength in real composites is much smaller than that of multi-fiber fragmentation sample with touched fiber. It was seen that the interfacial shear strengths saturated when the interfiber distance was over 50µm, the ones were saturated regardless of fiber surface treatment and the ones were in close agreement with those of the single fiber fragmentation test. Finally, the interfacial shear strength evaluated using two dimensional fragmentation tests are shown as real values in-site regardless of fiber surface treatment, interfiber distance and existing of matrix cracks.

The Use of a Single-Fiber Fragmentation Test to Study Environmental Durability of Interfaces/Interphases Between Epoxy and a Glass Fiber

1993 ◽  
Vol 304 ◽  
Author(s):  
Carol L. Schuute ◽  
Walter McDonough ◽  
Masatoshi Shioya ◽  
Donald L. Hunston
Keyword(s):  
Glass Fiber ◽  
Fiber Surface ◽  
Critical Length ◽  
Single Fiber ◽  
Resin Matrix ◽  
Matrix Interface ◽  
Model Composite ◽  
Fragmentation Test ◽  
Fiber Matrix ◽  
Fiber Fragmentation

AbstractThis work examines the usefulness of the single-fiber fragmentation test in studying the durability of fiber/matrix interfaces/interphases. This test measures the critical length/diameter ratio (L/D) of the fiber fragments formed in the test and relates this length to the interface's strength, or ability to transfer load. In the work reported here, we immersed samples of epoxy containing a single-glass fiber - that was previously sized with an epoxy-compatible coating - in either 65 or 75 °C water and tested after different times of exposure. In general, this ratio increased as a function of time of exposure to water. During exposure at 75 °C, the fibers' L/D in the samples did not increase significantly until after the sample reached its “apparent” equilibrium content of water ∼ (3.0 wt%). Because there was no significant measurable change in the tensile modulus between wet and dry samples, we cannot attribute these differences in L/D to changes in the resin's properties due to plasticizing by water. A small percentage of samples exposed at 65 °C did not show a significant increase in L/D, and in these cases the moisture produced a marked roughening of the fiber surface along the fiber/matrix interface. One possible explanation is that the attack by moisture degrades the interface, thus reducing its strength with a corresponding increase in the L/D. To varying degrees, however, the attack by moisture also degrades the E-glass fiber. This attack by moisture roughened the surfaces of the fibers and increased the distribution and/or size of the critical flaws, thus reducing both the strength of the fiber and the L/D. Based on our preliminary results, it appears that the singlefiber test has the potential to be useful for studying the durability of the resin/matrix interface providing that the influence of the environmental agent on all of the components of the model composite: resin, fiber, and interface/phase, is considered.

The Influence of Fiber Surface Treatment and SBR as Impact Modifier on Rheological Behavior and Mechanical Properties of Wood Plastic Composite from Acrylate-Styrene-Acrylonitrile and Bagasse

2017 ◽  
Vol 737 ◽  
pp. 281-286 ◽  
Author(s):  
Pornsri Sapsrithong ◽  
Kesinee Puksattee ◽  
Kingkaew Saewjaidee ◽  
Navapon Pensuk ◽  
Apaipan Rattanapan
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Surface Treatment ◽  
Rheological Behavior ◽  
Fiber Surface ◽  
Wood Plastic Composite ◽  
Plastic Composite ◽  
Styrene Acrylonitrile ◽  
Impact Modifier ◽  
Fiber Surface Treatment

Morphology, mechanical properties and rheological behavior of wood plastic composite, derived from acrylate-styrene-acrylonitrile (ASA) and bagasse which was treated with potassium permanganate (KMnO4) and using styrene butadiene rubber (SBR) as impact modifier, were reported. The effect of fiber surface treatment with KMnO4 and different amount of SBR on properties of wood plastic composite, prepared from ASA and 50 phr of bagasse, were investigated. Wood plastic composites (both treated and untreated) with varying amount of SBR, as impact modifier from 0-15 wt% of ASA, were prepared by melt-blending technique. The specimens were shaped with a compression molding machine and characterized, including morphology, impact strength, flexural properties and rheological behavior. It was demonstrated that the fiber surface treatment, using KMnO4, could effectively impove interfacial adhesion between bagasse and ASA matrix. These led to an improvement of morphology and mechanical properties such as impact strength, flexural strength and modulus. SEM micrographs revealed that the interfacial modification enhanced the interfacial adhesion between bagasse (fiber) and ASA (matrix) causing an increasing of shear stress and shear viscosity. Additionally, the effect of amount of SBR, as impact modifier, was also reported. The resulted showed that the impact strength was improved with increasing the amount of SBR (up 5 wt% of ASA) whereas, flexural strength and modulus were found to decrease with increasing SBR content.

Sign in / Sign up

Export Citation Format

Share Document