Epoxy Modified Polyurethanes Coated High Modulus Carbon Fiber: Synthesis and Properties Studies

2011 ◽  
Vol 217-218 ◽  
pp. 728-733 ◽  
Author(s):  
Yan Hong Tian ◽  
Zhan Qing Liu ◽  
Su Mei Kang ◽  
Xue Jun Zhang
Keyword(s):  
Carbon Fiber ◽  
Raw Materials ◽  
Crosslinking Agent ◽  
Epoxy Composites ◽  
High Modulus ◽  
Coating Agent ◽  
Interlaminar Shear ◽  
Carbon Fiber Epoxy ◽  
Thermal Stability Of ◽  
Properties Of Composites

With toluene 2, 4-diisocyanate (TDI), polyethylene glycol (PEG) and 2,3-Epoxy-1-prop -anol (glycidol) used as the raw materials, two epoxy terminated polyurethanes (EPU) was synthesized by prepolymerization and closed end. Moreover, EPU with high toughhess is chosen as a coating agent for carbon fiber with three ethylene tetramine (TETA) as curing agen. The influence of the content of crosslinking agent in the coating layer on properties of composites and the mechanism of interface toughness are investigated. The chemical structure and thermal property of the EPU were studied with FTIR, 1HNMR and TGA, respectively. It proves that the thermal stability of EPU is more stable than epoxy coating. The interlaminar shear strength (ILSS) of the sized high modulus carbon fiber/epoxy composites is improved to 71MPa, which increased by 19.4% compared with the composites reinforced by unsized high modulus carbon fiber, and DMTA show that using EPU as a new kind of polymer coating for carbon fiber is a feasible method to improve the interfacial performance of high modulus carbon fiber/epoxy composites.

Synthesis of Latent Curing Agent for Epoxy Resin

2010 ◽  
Vol 150-151 ◽  
pp. 988-991
Author(s):  
Xue Jun Zhang ◽  
Su Mei Kang ◽  
Zhan Qing Liu
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Chemical Structure ◽  
Epoxy Composites ◽  
Curing Agent ◽  
High Modulus ◽  
Molar Ratios ◽  
Interlaminar Shear ◽  
Modified Epoxy ◽  
Carbon Fiber Epoxy

A new kind of latent curing agent (LCA) for epoxy resin was synthesized by the reaction of Ethylenediamine with Butylacrylate in equal molar ratios, and the chemical structure and thermal property of the LCA were studied with FTIR and TGA, respectively. Moreover, LCA was also used to modify the epoxy sizing agent for high modulus carbon fiber. The results show that the wettability of sized carbon fiber tends to increase due to the increase of the polymer film on the surface of the carbon fiber, and interlaminar shear strength (ILSS) of the sized high modulus carbon fiber/epoxy composites is improved to 78MPa, which is increased by 8.6% compared with the composites reinforced by high modulus carbon fiber with unmodified sizing agent, indicating that using LCA modified epoxy resin as polymer coating for carbon fiber is a feasible method to improve the interfacial performance of high modulus carbon fiber/epoxy composites.

Effect of Ozone Treatment on the Interfacial Properties of High Modulus Carbon Fiber/Epoxy Composites

2007 ◽  
Vol 546-549 ◽  
pp. 1547-1550 ◽  
Author(s):  
Xiao Jin Zhao ◽  
Wei Qin ◽  
Ben Li Wang
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Fiber Surface ◽  
Interlaminar Shear Strength ◽  
Epoxy Composites ◽  
Ozone Treatment ◽  
High Modulus ◽  
Surface Impregnation ◽  
Interlaminar Shear ◽  
Carbon Fiber Epoxy

High modulus carbon/epoxy composites have been attached more and more importance in the aeronautic field. Because chemical inert of high modulus carbon fiber surface and its poor impregnation for resin, it is essential to improve its polarity in order to enhance the interfacial performances of high modulus carbon/epoxy composites. In this paper, high modulus carbon fiber was treated by ozone oxidation method to modify its surfacial properties. AFM and SEM were used to observe the surface of the carbon fiber, as well as interlaminar shear strength of high modulus carbon fiber/epoxy composite was tested. The impregnation and the interfacial performances of the high modulus carbon/epoxy composites were studied. The results show that after ozone treatment, the surface impregnation of high modulus carbon fiber and the interlaminar shear strength property of high modulus carbon/epoxy composites can be improved obviously.

DEGRADATION OF CARBON FIBER/EPOXY COMPOSITES BY XE LAMP AND HUMIDITY

2006 ◽  
Vol 20 (25n27) ◽  
pp. 3686-3691 ◽  
Author(s):  
XIAOJUN LV ◽  
QI ZHANG ◽  
GUOJUN XIE ◽  
GUANJIE LIU
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Epoxy Composite ◽  
Interlaminar Shear Strength ◽  
Epoxy Composites ◽  
Radiation Temperature ◽  
Transverse Tensile ◽  
Interlaminar Shear ◽  
Transverse Tensile Strength ◽  
Carbon Fiber Epoxy

In order to understand the effect of natural environmental factors on the carbon fiber/epoxy composites, the degradation of carbon fiber/epoxy composite was studied. The specimens were exposed in a Xe lamp chamber and suffered to ultraviolet light radiation, temperature and/or humidity conditions. The results show that the radiation, temperature and/or humidity could cause extensive corrosion to the surface and interior of the carbon/epoxy composite and attack the interface between matrix and carbon fiber, resulting in an obvious reduction of the transverse tensile strength and interlaminar shear strength. On the contrary, the longitudinal transverse shear strength was not affected much by the radiation, temperature and/or humidity. The results indicate that the radiation, temperature and/or humidity can result in the corrosion of the carbon/epoxy composite and consequently affect the mechanical properties of the carbon/epoxy composite partially.

Effect of a New Coupling Agent on Mechanical Properties of Domestic High-Modulus Carbon Fiber/Cyanate Composites

2013 ◽  
Vol 873 ◽  
pp. 411-416
Author(s):  
Wei Qiang Chen ◽  
De Qun Peng ◽  
Wei Qin
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Coupling Agent ◽  
Interlaminar Shear Strength ◽  
Raw Material ◽  
Bend Strength ◽  
High Modulus ◽  
Overall Performance ◽  
Interlaminar Shear ◽  
Properties Of Composites

To improve the overall performance of the domestic high-modulus carbon fiber/cyanate composites, a macromolecular coupling agent (SCC) based on the raw material styrene, methyl acrylate and γ-methyl (acryloyl) trimethoxysilane was synthesized. It also studies the effect of coupling agent content on the mechanical properties of composites. The results show that the dosage of macromolecular coupling agent with 3%, the performance of the composite materials has been notable improved, its bend strength and interlaminar shear strength are 1100Mpa and 63.5Mpa, which has been raised 6.0% and 16.1%, respectively. SEM micrographs show that the addition of a coupling agent effectively improve the interface compatibility between the resin and fibers in composite.

Explaining Spring-In in Filament Wound Carbon Fiber/Epoxy Composites

2000 ◽  
Vol 34 (13) ◽  
pp. 1216-1239
Author(s):  
JEFF M. GANLEY ◽  
ARUP K. MAJI ◽  
STEVEN HUYBRECHTS
Keyword(s):  
Carbon Fiber ◽  
Epoxy Composites ◽  
Filament Wound ◽  
Carbon Fiber Epoxy
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