A STUDY OF THE ADHESION MECHANISM OF OXIDISED CARBON FIBRES TO EPOXY RESIN BY SURFACE ANALYSIS.

1991 ◽  
pp. 125-128
Author(s):  
C.A. Baillie ◽  
J.F. Watts ◽  
J.E. Castle ◽  
M.G. Bader
Keyword(s):  
Epoxy Resin ◽  
Surface Analysis ◽  
Carbon Fibres ◽  
Adhesion Mechanism

Thermal Expansion of Composite System Epoxy Resin/Recycled Carbon Fibers

2020 ◽  
Vol 994 ◽  
pp. 162-169
Author(s):  
Štěpánka Dvořáčková ◽  
Dora Kroisová
Keyword(s):  
Experimental Study ◽  
Thermal Expansion ◽  
Epoxy Resin ◽  
Carbon Fibers ◽  
Composite System ◽  
Linear Thermal Expansion Coefficient ◽  
Linear Thermal Expansion ◽  
Carbon Fibres ◽  
Sample Matrix ◽  
Composite Systems

This experimental study deals with the problematics of thermal expansion α [10-6/K] of the composite systems based on recycled carbon fibres reinforced epoxy resin. The epoxy resin CHS – EPOXY 520 (EPOXY 15), cured with the hardener P11 (Districhem, s.r.o.), was chosen as a sample matrix. Recycled carbon fibres with a diameter of 7 μm and a length of 100 μm (Easy Composites Ltd.) were the filler. In the experiment, samples with the fulfilment of 10, 20, 40, 60, 80, 90 and 100 phr were prepared. The samples were being poured into silicone molds, cured at an overpressure of 0.7 MPa and a temperature of 23 ± 2 °C for 24 hours. A thermomechanical analyzer was used to determine the thermal expansion of composite systems. The addition of recycled carbon fibers to epoxy resin can reduce the coefficient of linear thermal expansion at 20°C in half, from the original α = 45 to 55 × 10-6/K for non-filled epoxy resin to α = 25 to 27 × 10-6/K for filled epoxy resin. Optimal filling is at the level of 40 phr, with higher filling there is no further reduction of the linear thermal expansion coefficient.

The mechanism of epoxy-resin curing in the presence of glass and carbon fibres

Polymer ◽  
1992 ◽  
Vol 33 (6) ◽  
pp. 1187-1199 ◽  
Author(s):  
Marie-Florence Grenier-Loustalot ◽  
Philippe Grenier
Keyword(s):  
Epoxy Resin ◽  
Carbon Fibres ◽  
Resin Curing

Adhesion and surface analysis of carbon fibres electrochemically oxidized in aqueous potassium nitrate

1998 ◽  
Vol 33 (12) ◽  
pp. 3151-3162 ◽  
Author(s):  
S. F Waseem ◽  
S. D Gardner ◽  
Guoren He ◽  
Wenbo Jiang ◽  
U Pittman Jr
Keyword(s):  
Surface Analysis ◽  
Potassium Nitrate ◽  
Carbon Fibres

Effect of Chemical Oxidation on the Interfacial Bonding between Carbon Fibre and Epoxy Resin

2001 ◽  
Vol 9 (5) ◽  
pp. 351-359 ◽  
Author(s):  
Jeng-Shyong Lin ◽  
Ye-Houn Huang ◽  
Hsien-Tang Chiu
Keyword(s):  
Tensile Strength ◽  
Flexural Strength ◽  
Carbon Fibre ◽  
Epoxy Resin ◽  
Chemical Oxidation ◽  
Interfacial Bonding ◽  
Carbon Fibres ◽  
Ferric Ions ◽  
Before And After ◽  
Interlaminar Shear

Polypyrrole (PPy) was deposited on carbon fibres via the oxidation-polymerization of pyrrole (Py) with ferric ions. These PPy-deposited carbon fibres were then made into composite boards with epoxy resin. The interfacial bonding between carbon fibre and epoxy resin was evaluated by measuring the interlaminar shear strength (ILSS), tensile strength before and after impact (TAI), and flexural strength. Experimental results show that deposition of PPy can improve the ILSS, tensile strength, and flexural strength. Furthermore, TAI is also reduced by the deposition of PPy. The interfacial bonding was the highest when the carbon fibre was immersed in 20 wt% FeCl3(aq) and then reacted with 0.5 M Py in acetonitrile for 20 min.

Characterisation of carbon fibres recycled from carbon fibre/epoxy resin composites using supercritical n-propanol

2009 ◽  
Vol 69 (2) ◽  
pp. 192-198 ◽  
Author(s):  
G JIANG ◽  
S PICKERING ◽  
E LESTER ◽  
T TURNER ◽  
K WONG ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Epoxy Resin ◽  
Resin Composites ◽  
Carbon Fibres ◽  
Epoxy Resin Composites

scholarly journals The Effect of Sizing Agent of Carbon Fibre on the Interface of Electron Beam Cured Composites

2011 ◽  
Vol 20 (6) ◽  
pp. 096369351102000
Author(s):  
Jianwen Bao ◽  
Ye Li ◽  
Xiangyu Zhong ◽  
Xiangbao Chen
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Carbon Fibre ◽  
Heat Resistance ◽  
Epoxy Resin ◽  
Chemical Structure ◽  
Carbon Fibres ◽  
Composite Properties ◽  
Properties Of Composites

To understand the effect of interface on the properties of electron beam cured composites, the composition and its chemical structure of the sizing agent of carbon fibres were investigated. The results show that there are alkali groups in the sizing agent of T300 and T800 carbon fibres, and these alkali groups react with the strong proton acids that are generated by the initiator and hinder the EB curing of cationic epoxy resin matrices. The properties of the composites of T300 and T800 carbon fibres cured by EB were poor. In the composites of T700, M40 and M40J carbon fibres, the effects of the sizing agent of the carbon fibres on the EB curing and the composite properties are less than for T300 and T800. After the carbon fibres were extracted by acetone, the properties of their composites improved. In particular, the heat-resistance and mechanical properties of composites of T300 and T800 carbon fibre increased greatly.

Novel Approach in B-Staging of an Epoxy Resin for Development of rCF Non-Woven Prepregs for RTP Processing

2019 ◽  
Vol 809 ◽  
pp. 521-526
Author(s):  
Christian Goergen ◽  
Andreas Klingler ◽  
Sergiy Grishchuk ◽  
David May ◽  
Bernd Wetzel ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Room Temperature ◽  
State Of The Art ◽  
Processing Temperature ◽  
Carbon Fibres ◽  
Thermosetting Resin ◽  
Resin System ◽  
Composite Manufacturing ◽  
Manufacturing Technique ◽  
Novel Approach

A novel B-stage resin system is developed for the „Resin Transfer Pressing“ (RTP) process. This composite manufacturing technique makes use of nonwoven and recycled carbon fibres (rCF) that are oversaturated with a thermosetting resin. The new resin system is based on two different hardeners, allowing to easily impregnate the rCF, storing the semi-finished parts at room temperature and finally curing them via compression molding. It is shown that a commercially available resin system can be tailored to the required needs by the smart combination of state-of-the art, latent hardener systems.The present study focusses on the route for B-staging of the resin system. The viscosity for impregnation and oversaturation was adjusted to be in the range of 5 to 40 Pa·s at 60°C. The viscosity increases to above 50 Pa·s at room temperature, allowing storage and handling of the semi-finished parts and processing them whenever it is required. Choosing a proper processing temperature is important during the B-staging process to avoid any unintended activation of the second hardener, which is responsible for the final curing stage of the system.

On the transverse cracking and longitudinal splitting behaviour of glass and carbon fibre reinforced epoxy cross ply laminates and the effect of Poisson and thermally generated strain

1979 ◽  
Vol 366 (1727) ◽  
pp. 599-623 ◽  
Keyword(s):  
Carbon Fibre ◽  
Epoxy Resin ◽  
Glass Fibre ◽  
Failure Strain ◽  
Carbon Fibres ◽  
Longitudinal Splitting ◽  
Transverse Cracking ◽  
Experimental Strains

90° cross ply epoxy resin laminates reinforced with either glass or carbon fibres were tested in tension as a function of ply thickness. Transverse cracking of the 90° plies and longitudinal splitting of the 0° plies has been observed and the experimental strains recorded. Energetics arguments have been presented which explain this behaviour and permit experimental ply cracking strains to be estimated. The effects of thermal strains generated during fabrication and Poisson generated strains have been assessed and included in the energetics calculations. The thermal strains were determined and found to be large in carbon fibre/epoxy laminates compared with glass fibre/epoxy laminates. Poisson effects are significant in the glass fibre/epoxy laminates due to the higher failure strain of these composites. The micro mechanics of failure were also studied and fibre debonding identified as a source of 90° ply failure.

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