Preparation and Mechanical Properties of Lignin/Epoxy Resin Composites

2012 ◽  
Vol 482-484 ◽  
pp. 1959-1962 ◽  
Author(s):  
Quan Fu Yin ◽  
Ming Wei Di
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Epoxy Resin ◽  
Bending Strength ◽  
Resin Composites ◽  
Ftir Analysis ◽  
Opposite Trend ◽  
Bonding Effect ◽  
Epoxy Resin Composites ◽  
The Impact

Lignin/epoxy resin composites were prepared by blending lignin with epoxy resin cured by polyamide. The effect of the content of lignin and polyamide on the mechanical properties of the lignin/epoxy resin composites was studied systemically. And the structure for the blend of lignin and epoxy resin without the curing agent was characterized by Fourier transform infrared spectroscopy (FTIR). The results of mechanical properties test showed that the bending strength of the composites decreases gradually with increasing the content of lignin, while the impact strength increased firstly and then decreased. The bending strength of lignin/epoxy resin composites showed a trend of increasing firstly and then decreasing with the increase of the content of polyamide, while the impact strength exhibited an opposite trend. The density for the composites increased with the addition of lignin, and polyamide exhibited an inconspicuous effect on density of the composites. The FTIR analysis results showed that the epoxy resin could be cured by lignin without polyamide, which concluded that the lignin could catalyze the cross-linking of epoxy resin or react with epoxy resin, and this bonding effect would beneficial to the properties of lignin/epoxy resin composites.

Shape and size effects of ceria nanoparticles on the impact strength of ceria/epoxy resin composites

Particuology ◽  
2011 ◽  
Vol 9 (1) ◽  
pp. 80-85 ◽  
Author(s):  
Xiaoqiang He ◽  
Dengsong Zhang ◽  
Hongrui Li ◽  
Jianhui Fang ◽  
Liyi Shi
Keyword(s):  
Impact Strength ◽  
Epoxy Resin ◽  
Size Effects ◽  
Resin Composites ◽  
Ceria Nanoparticles ◽  
Epoxy Resin Composites ◽  
The Impact ◽  
Shape And Size

Mechanical properties of cured epoxy resin

2021 ◽  
Author(s):  
Sergey Savotchenko ◽  
Ekaterina Kovaleva
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Impact Strength ◽  
Epoxy Resin ◽  
Mass Fraction ◽  
Mechanical Characteristics ◽  
Bending Strength ◽  
The Impact ◽  
Impact Viscosity

We study experimentally the influence of mass fraction of L-20 hardener cold cure on mechanical properties of epoxy diane resin ED-20. We measure the hardness, tensile strength, bending strength and impact strength of resin at different values of the hardener mass fraction. It is found that the ratio hardener mass fraction of 1:0.9 leads to the highest values of the hardness, tensile strength, compressive strength and bending strength. The impact viscosity is maximum at the ratio hardener mass fraction of 1:0.8. The optimal ratio of a non-toxic safe hardener to the resin is derived based on obtained mechanical characteristics.

STUDY ON THE THERMOMECHANICAL PROPERTIES AND MORPHOLOGY OF POLYACID AMIDE/EPOXY RESIN COMPOSITES

2010 ◽  
Vol 03 (03) ◽  
pp. 165-168
Author(s):  
SHAORONG LU ◽  
XIAOWANG YANG ◽  
CHUN WEI
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Dynamic Mechanical Properties ◽  
Decomposition Temperature ◽  
Thermomechanical Properties ◽  
Aromatic Ester ◽  
Resin Composites ◽  
Fracture Feature ◽  
Epoxy Resin Composites ◽  
The Impact

Polyamic acid (PAA) containing aromatic ester was synthesized and used to modify the epoxy resin (E-51)/PAA curing system. The mechanical properties, dynamic mechanical properties, fracture surface morphology, and thermal properties of the E-51/PAA curing systems were systematically investigated. Experimental results revealed that the impact strength of the cured systems modified with PAA are 3 to 4 times higher than that of the unmodified system, and enhanced the thermal decomposition temperature by about 15°C, while the storage modulus is also higher than that of the unmodified system, and the fracture surfaces of modified systems display tough fracture feature.

scholarly journals Investigation of Mechanical Properties for Basalt Fiber/Epoxy Resin Composites Modified with La

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 666
Author(s):  
Chong Li ◽  
Haoyu Wang ◽  
Xiaolei Zhao ◽  
Yudong Fu ◽  
Xiaodong He ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Interfacial Adhesion ◽  
Bending Strength ◽  
Basalt Fiber ◽  
Resin Matrix ◽  
Resin Composites ◽  
Basalt Fibers ◽  
The Poor ◽  
Epoxy Resin Composites

As an efficient reinforcing material in resin matric composites, the application of basalt fibers (BFs) in composites is limited by the poor interfacial adhesion between BFs and the resin matrix. In this study, to obtain the basalt fibers/epoxy resin composites with enhanced mechanical properties, the modification solution containing different concentrations of Lanthanum ions (La3+) was synthesized to modify the BFs surfaces to enhance the poor interfacial adhesion between BFs and the matrix. The morphology, the chemical structure and the chemical composition of the modified BFs surface were observed and detected by scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, respectively. The results show that, after BFs were soaked in the modification solution, the more active groups (C=O, –OH, C–O, etc.) were introduced to the BFs surfaces and effectively enhanced the bond strength between BFs and the resin matrix. The obtained mechanical performances of prepared basalt fibers/epoxy resin composites showed that the tensile strength, bending strength and interlaminar shear strength (ILSS) were improved with the modified BFs, and reached to 458.7, 556.7 and 16.77 Mpa with the 0.5 wt.% La. Finally, the enhancement mechanism of the modification solution containing La element is analyzed.

The curing kinetics and mechanical properties of epoxy resin composites reinforced by PEEK microparticles

2020 ◽  
Vol 91 ◽  
pp. 106781
Author(s):  
Ting Zheng ◽  
Hang Xi ◽  
Zixuan Wang ◽  
Xiaohong Zhang ◽  
Yuan Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Curing Kinetics ◽  
Resin Composites ◽  
Epoxy Resin Composites

scholarly journals Development of Coffee Biochar Filler for the Production of Electrical Conductive Reinforced Plastic

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1916 ◽  
Author(s):  
Mauro Giorcelli ◽  
Mattia Bartoli
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Carbon Black ◽  
Epoxy Resin ◽  
Resin Composites ◽  
Powder Form ◽  
Coffee Waste ◽  
Reinforced Plastic ◽  
Epoxy Resin Composites

In this work we focused our attention on an innovative use of food residual biomasses. In particular, we produced biochar from coffee waste and used it as filler in epoxy resin composites with the aim to increase their electrical properties. Electrical conductivity was studied for the biochar and biochar-based composite in function of pressure applied. The results obtained were compared with carbon black and carbon black composites. We demonstrated that, even if the coffee biochar had less conductivity compared with carbon black in powder form, it created composites with better conductivity in comparison with carbon black composites. In addition, composite mechanical properties were tested and they generally improved with respect to neat epoxy resin.

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