Coupling Agents Effect on Properties of Straw/HDPE Composites and Mechanism Analysis

2010 ◽  
Vol 113-116 ◽  
pp. 1797-1800 ◽  
Author(s):  
Shi Ming Hu ◽  
Min Xu
Keyword(s):  
Mechanical Properties ◽  
Pollution Control ◽  
Interfacial Adhesion ◽  
Coupling Agents ◽  
Mechanism Analysis ◽  
Waste Plastic ◽  
Microstructure Change ◽  
Two Phases ◽  
Better Than ◽  
Properties Of Composites

The recycling of crop straw and waste plastic related to environmental pollution control and improvement.In this paper,we study the effects of different kinds of coupling agents on the mechanical properties and the microstructure change of the composite; MAPP、MAPE and TSZ as the coupling agent to enhance the interfacial adhesion between straw fiber and HDPE. The results indicate that: Coupling agents can modify the Straw/HDPE composites’ combined state of the two phases interfaces. MAPE can improve the mechanical properties of composites better than MAPP. Adding TSZ would suppression the two interfaces combination of HDPE and straw, depress the mechanical properties.DMA shows that adding MAPE in the composites, the storage modulus and glass transition temperature increased, the damping performance decreased. SEM shows that after adding MAPE the combination of composites have significantly improved.

Effect of Modified Diatomite on Crystallinity and Mechanical Properties of Polypropylene

2018 ◽  
Vol 913 ◽  
pp. 551-557 ◽  
Author(s):  
Yu Zhao ◽  
Ming Du ◽  
Ke Xin Zhang ◽  
Liang Gao
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Coupling Agent ◽  
Acid Ester ◽  
Coupling Agents ◽  
Polypropylene Composite ◽  
Polypropylene Composites ◽  
Different Content ◽  
Better Than ◽  
Properties Of Composites

The different coupling agent is used for diatomite modification. The diatomite with different content are melt and mixed with polypropylene to prepare diatomite/polypropylene composites. The modification effects of different coupling agent on diatomite and the influence of agent and diatomite contents on crystallization behavior of polypropylene and mechanical properties of composites are investigated. The results show that different coupling agents have the modification effects on diatomite influence crystallization of polypropylene but the aluminum agent is better than other agents. With the increase of the content of aluminum acid ester coupling agent, the size of bubble pore is uniform, and then the compressive strength reaches to a maximum when aluminum acid ester coupling agent content is 1%. With the increase of the content of diatomite, the porosity of bubble pore of diatomite/polypropylene composite material is gradually increases. The crystallinity of polypropylene and yield strength reach to a maximum (48.15% and 21.5%) when diatomite content is 30%. In addition, the diatomite/polypropylene composites have better compressive strength than the others.

Effect of Ferrite Volume Fraction on Mechanical Properties of X80 Pipeline Steel

2014 ◽  
Vol 989-994 ◽  
pp. 212-215
Author(s):  
J. Liu ◽  
G. Zhu ◽  
W. Mao
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Work Hardening ◽  
Single Phase ◽  
Volume Fraction ◽  
Pipeline Steel ◽  
X80 Pipeline Steel ◽  
Hardening Behavior ◽  
Two Phases ◽  
Better Than

The effect of volume fraction of ferrite on the mechanical properties including strength, plasticity and wok hardening was systematically investigated in X80 pipeline steel in order to improve the plasticity. The microstructures with different volume fraction of ferrite and bainite were obtained by heat-treatment processing and the mechanical properties were tested. The work hardening behavior was analyzed by C-J method. The results show that the small amount of ferrite could effectively improve the plasticity. The work hardening ability and the ratio of yield/tensile strength with two phases of ferrite/bainite would be obviously better than that with single phase of bainite. The improvement of plasticity could be attributed to the ferrite in which more plastic deformation was afforded.

Isocyanate Modification of Wood Fiber in Enhancing the Performance of its Composites with High Density Polyethylene

2012 ◽  
Vol 3 (2) ◽  
pp. 43-60 ◽  
Author(s):  
Fereshteh Arjmand ◽  
Mohammad Barmar ◽  
Mehdi Barikani
Keyword(s):  
Mechanical Properties ◽  
Interfacial Adhesion ◽  
Moisture Absorption ◽  
Wood Fiber ◽  
Cetyl Alcohol ◽  
Toluene Diisocyanate ◽  
Coupling Agents ◽  
Ftir Analysis ◽  
Moisture Uptake ◽  
Chemical Treatments

This study is focused on the modification of wood fiber by using a reactive diisocyanate (toluene diisocyanate, TDI) linker to couple wood fiber with cetyl alcohol and the investigation of its effects on mechanical properties of wood fiber–HDPE composites. The reaction of TDI with wood fiber and then cetyl alcohol resulted in the formation of new urethane bonds assessed by FTIR analysis. Therefore, TDI ended cetyl alcohol was used as a coupling agent in the preparation of wood fiber/ HDPE composite. The outcomes showed that the addition of such coupling agents resulted in greater reinforcement of composites, as indicated by the improvement in mechanical properties. Tensile strength of prepared composites increased by almost 64%, whereas 47% increase in flexural strength and 113% increase in impact properties was observed. However, the moisture absorption of the composites decreased by about 43%. All chemically treated composites showed lower moisture uptake than the untreated composites. This may be due to chemical treatment of wood fiber which reduces its hydrophilicity. These chemical treatments promote interfacial adhesion of fiber and HDPE matrix. Furthermore, scanning electron microscopy (SEM) revealed the improved morphology of the fractured surfaces of composites.

DISPERSION AND MECHANICAL PROPERTIES OF CERIUM OXIDE FILLED INTO RUBBER COMPOSITES

2014 ◽  
Vol 87 (2) ◽  
pp. 340-347 ◽  
Author(s):  
Zhaogang Liu ◽  
Mei Li ◽  
Yanhong Hu ◽  
Hai Fu ◽  
Mitang Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cerium Oxide ◽  
Rubber Matrix ◽  
X Ray Diffraction ◽  
Small Particles ◽  
Rubber Composites ◽  
X Ray ◽  
Large Particles ◽  
Better Than ◽  
Properties Of Composites

ABSTRACT Rubber composites were synthesized by natural rubber filled with cerium oxide with different particle diameters. The dispersion morphology of cerium oxide in rubber matrix and the mechanical properties of composites were studied, and the contrast experiment of reinforcing rubber with cerium oxide was performed. The results showed that the small particles of cerium oxide had better disparity than the large particles of cerium oxide in NR. The mechanical properties of rubber filled with small particles of cerium oxide were better than those of rubber filled with large particles of cerium oxide. The crystalline rubber was measured by X-ray diffraction, which indicated that the CeO2 accelerated crystallization capacity and confined the rubber chain movement. The tensile strength of rubber was increased by this confinement.

The Studying on the Influence of Coupling Agents to Short Glass Fiber Reinforced Polyamide Composites

2011 ◽  
Vol 181-182 ◽  
pp. 836-841
Author(s):  
Jiang Liu ◽  
Xiang Guo Liu
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Fiber Content ◽  
Coupling Agents ◽  
Fiber Reinforced ◽  
Short Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Twin Screws ◽  
Short Glass ◽  
Better Than

Influence of coupling agents on microstructure and mechanical properties of short glass fiber reinforced PA66 composites(SGF/PA66) were investigated by using twin screws extruder and injection machine in this paper. When coupling agents (A1100 or A1100+A+B) were added, short glass fiber was distributed in the PA66 matrix more homogeneously; at the same time, the microstructure and properties of GF/PA66 were improved too. Modified effect of multiple coupling agent (A1100+A+B) is better than that of only A1100 and the desired content of A1100 is about 1.5~2.0wt%. When glass fiber content was less than the critical value (35~40%), mechanical properties of PA composites increase with fiber content increasing, but it begin to decrease when content was excess that value. At last, Failure mechanism of GF/PA66 (treated by A1100 or A1100+A+B) was obtained: adhesion of interface between glass fiber and PA66 matrix, friction after the adhesion, glass fiber pullouted and matrix failure.

scholarly journals Studies on Glass Fiber-Reinforced Poly(Ethylene-Grafted-Styrene)-Based Cation Exchange Membrane Composite

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5597
Author(s):  
Di Huang ◽  
Zhichao Chen ◽  
Jiann-Yang Hwang
Keyword(s):  
Mechanical Properties ◽  
Cation Exchange ◽  
Glass Fiber ◽  
Interfacial Adhesion ◽  
Tensile Modulus ◽  
Exchange Capacity ◽  
Coupling Agents ◽  
Negative Effects ◽  
Electron Microscopes ◽  
Poly Ethylene

To improve interfacial adhesion between glass fiber (GF) and poly(ethylene-grafted-styrene)-based cation exchange membranes (CEM), GF was modified by four coupling agents: [3-(Methacryloxy)propyl] trimethoxy silane (3-MPS), 1,6-bis (trimethoxysilyl) hexane (1,6 bis), Poly(propylene-graft-maleic anhydride) (PP-g-MA) and Triethoxyvinylsilane (TES). The results indicated the addition of modified GF increased tensile strength, tensile modulus, storage modulus and interfacial adhesion of GF/CEM composite but degraded the strains. The composite with 3-MPS modified GF obtained superior mechanical properties and interfacial adhesion, whereas the modified effect of TES was inconspicuous. The addition of unmodified GF even had negative effects on GF/CEM mechanical properties. The field emission scanning electron microscopes (FE-SEM) showed that the GF treated by 3-MPS and PP-g-MA have better compatibility with the CEM matrix than 1,6 bis and TES-treated GF. The Fourier-transform infrared spectroscopy (FT-IR) verified that the strengthening effects from modified GF were attributed to the formation of Si-O-Si and Si-O-C bonds. The additions of modified GF in CEM positively influence water uptake ability but negatively influence ion exchange capacity (IEC). This research provided a way of strengthening GF/CEM composite and pointed out which functional groups included in coupling agents could be useful to GF-reinforced composite.

scholarly journals Effect of Glass Fibers Thermal Treatment on the Mechanical and Thermal Behavior of Polysulfone Based Composites

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 902 ◽  
Author(s):  
Galal Sherif ◽  
Dilyus I. Chukov ◽  
Victor V. Tcherdyntsev ◽  
Valerii G. Torokhov ◽  
Dmitry D. Zherebtsov
Keyword(s):  
Mechanical Properties ◽  
Thermal Treatment ◽  
Interfacial Adhesion ◽  
Chemical Structure ◽  
Glass Fibers ◽  
Mechanical Analysis ◽  
Shear Tests ◽  
Sem Images ◽  
Polymer Ratio ◽  
Properties Of Composites

The effect of thermal treatment of glass fibers (GF) on the mechanical and thermo-mechanical properties of polysulfone (PSU) based composites reinforced with GF was investigated. Flexural and shear tests were used to study the composites’ mechanical properties. A dynamic mechanical analysis (DMA) and a heat deflection temperature (HDT) test were used to study the thermo-mechanical properties of composites. The chemical structure of the composites was studied using IR-spectroscopy, and scanning electron microscopy (SEM) was used to illustrate the microstructure of the fracture surface. Three fiber to polymer ratios of initial and preheated GF composites (50/50, 60/40, 70/30 (wt.%)) were studied. The results showed that the mechanical and thermo-mechanical properties improved with an increase in the fiber to polymer ratio. The interfacial adhesion in the preheated composites enhanced as a result of removing the sizing coating during the thermal treatment of GF, which improved the properties of the preheated composites compared with the composites reinforced with initial untreated fibers. The SEM images showed a good distribution of the polymer on the GF surface in the preheated GF composites.

scholarly journals The Characterization of Mechanical Properties of Jute/PLA Composites with Modified Nano Sio2 by Coupling Agent

2021 ◽  
Author(s):  
Xueyang Song ◽  
Cuicui Fang ◽  
Yuanyuan Li ◽  
Yan Zhang ◽  
Ping Wang
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Thermal Stability ◽  
Thermal Properties ◽  
Interfacial Adhesion ◽  
Thermomechanical Properties ◽  
Coupling Agents ◽  
Toughening Mechanism ◽  
Application Prospects

Abstract Although fibers-reinforced PLA composites show strong application prospects, their low mechanical properties limit their applications to some extent. In this paper, nano-SiO2 particles as well as modified nano SiO2 by coupling agents which can efficiently improve the strength and toughness of composite materials are introduced into the PLA matrix. The bending, stretching and thermal properties of designed jute/PLA nonwoven composites were studied. The study shows that the nano-SiO2 particles are beneficial for the interface performance between the PLA matrix and jute leading to improvement in the mechanical property and thermal stability. Moreover, thermomechanical properties indicate that the addition of SiO2 can improve the jute/PLA interfacial adhesion and increase the glass transition temperature of the material. Finally, toughening mechanism of nano-SiO2 particles in the jute/PLA composite was analyzed.

scholarly journals Properties of Poplar Fiber/PLA Composites: Comparison on the Effect of Maleic Anhydride and KH550 Modification of Poplar Fiber

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 729
Author(s):  
Zhaozhe Yang ◽  
Xinhao Feng ◽  
Min Xu ◽  
Denis Rodrigue
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Thermal Properties ◽  
Maleic Anhydride ◽  
Economic Efficiency ◽  
Interfacial Adhesion ◽  
Silane Coupling Agent ◽  
Natural Fiber ◽  
Silane Coupling ◽  
Properties Of Composites

To improve the interfacial adhesion and dispersion of a poplar fiber in a polylactic acid (PLA) matrix, maleic anhydride (MA) and a silane coupling agent (KH550) were used to modify the poplar fiber. The poplar fiber/PLA composites were produced with different modifier contents. The mechanical, thermal, rheological, and physical properties of composites were investigated. A comparison of different natural fiber modifications on the properties of composites was also analyzed. The results showed that both MA and KH550 could improve the interfacial adhesion between the poplar fiber and PLA, resulting in the enhanced mechanical properties of the composite, with 17% and 23% increases of tensile strength for 0.5% MA and 2% KH550, respectively. The thermal properties of the composites were improved at 6% KH550 (a 9% enhancement of T90%) and decreased at 0.5% MA (a 6% decrement of T90%). The wettability of the composites obtained a 11.3% improvement at 4% KH550 and a 5% reduction at 4% MA. Therefore, factors such as mechanical properties, economic efficiency, and durability should be carefully considered when choosing the modifier to improve the property of the composite.

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