The Preparation and Property of Organic Solvent Lignin and PVC Composite Materials

2011 ◽  
Vol 236-238 ◽  
pp. 1195-1198 ◽  
Author(s):  
Qing Wei Ping ◽  
Jing Xiao ◽  
Jian Zhao
Keyword(s):  
Tensile Strength ◽  
Composite Material ◽  
Organic Solvent ◽  
Mechanical Performance ◽  
Fracture Morphology ◽  
Impact Fracture ◽  
Dispersed Phase ◽  
Bend Strength ◽  
The Impact ◽  
Scanning Electron

The organic solvent lignin in this paper was extracted from the scrap liquid of the reed ethanol pulping. The attained lignin was characterized by Scanning Electron Microscope（SEM）.On this basis，the lignin is blended with PVC and other auxiliaries, PVC/lignin composite material is prepared by pressure molding. The mechanical performance index of PVC/lignin composite material is detected and the impact fracture morphology of the PVC/lignin composite material is observed by SEM photograph. According to the research, it is indicted that the lignin and PVC has a certain degree of compatibility. The less dosage of lignin, the better compatibility lignin and PVC performances. With the increasing of dosage of lignin, the impact strength, tensile strength and bend strength of PVC/lignin composite material decrease. Compared with 5 phr PVC/lignin composite material, the dispersed phase diameter of the impact fracture morphology of 20 phr PVC/lignin composite material becomes bigger, and the uniformity of distribution becomes worse.

Impact Fracture of Jointed Steel Plates of Bolted Joint of Cars

2014 ◽  
Vol 566 ◽  
pp. 232-237
Author(s):  
H. Ambarita ◽  
M. Daimaruya ◽  
H. Fujiki
Keyword(s):  
Tensile Strength ◽  
Shear Test ◽  
Fracture Criterion ◽  
Shear Fracture ◽  
Impact Fracture ◽  
Bolted Joints ◽  
Steel Plates ◽  
Bolted Joint ◽  
Car Body ◽  
The Impact

The present study is concerned with the development of a fracture criterion for the impact fracture of jointed steel plates of a lap bolted joint used in the suspension parts of a car body. For the accurate prediction of crash characteristics of car bodies by computer-aided engineering (CAE), it is also necessary to examine the behaviour and fracture of the jointed steel plates subjected to impact loads. Although the actual impact fracture of jointed steel plates of a lap bolted joint in cars is complicated, for simplifying it is classified into the shear fracture and the extractive fracture of jointed steel plates. Three kinds of steel plates, i.e., common steel with the tensile strength of 270 MPa and two high tensile strength steels with the tensile strength of 440 and 590 MPa level used for vehicles, are examined. In the impact shear test, the specimens are made of two plates and jointed by a bolt, and in the impact extractive test the specimens are made of a plate and drilled in the centre for a bolt. The impact shear test of jointed steel plates of lap bolted joints is performed using a modified split Hopkinson bar apparatus, while the impact extractive one is performed using one-bar method. Numerical simulations by a FEM code LS-DYNA are also carried out in order to understand the mechanism of shearing and extractive fractures process of jointed steel plates. The obtained results suggest that a stress-based fracture criterion may be developed for the impact shearing and extractive fractures of jointed steel plates of lap bolted joints used in a car body.

scholarly journals Thermal, mechanical and morphological properties of polyurethane–zirconia loading

2020 ◽  
Author(s):  
Ali J Salman ◽  
Ali Assim Al-Obaidi ◽  
Dalya H Al-Mamoori ◽  
Lina M Shaker ◽  
Ahmed A Al-Amiery
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Thermal Properties ◽  
Material Science ◽  
Morphological Properties ◽  
Flexural Stress ◽  
Renewable Materials ◽  
Sem Images ◽  
The Impact ◽  
Scanning Electron

Abstract The polyurethane (PU) has been showing a dramatic increase in applications related to material science and technology. However, the mechanical, physical and thermal properties could be further improved by loading PU with zirconia (Zr) to create renewable materials known as polyurethane–zirconia (PUZ) composites. In this study, PU matrix was treated with wt.% Zr at 0.5, 1.0, 1.5 and 2.0. In this study, the thermo-mechanical properties and the morphology were investigated of PU and PUZ nano-samples. The images of the scanning electron microscope (SEM) were the prime tool in investigating PU and PUZ surfaces and fractured surfaces showing vanishing the cracks and formation of agglomeration on the sample PUZ-1.5%. In addition, the tensile strength, Young’s modulus and maximum loading were improved by 36.7, 31.8 and 39.1%, respectively, at Zr loading of 1.5 wt.%. The flexural stress and the load were improved by 94.3% and 93.6%, respectively, when Zr loading was 1.5 wt.%. The impact without and with a notch was improved by 110.7% and 62.6%, respectively, at Zr loading of 1.5 wt.%. The the morphologies of the PU surface and Zr surface supported by SEM images. Regarding the storage modulus ability of PU and PUZ composites, Zr loading has negatively influenced E. The E functioning temperature was observed to move from 142 to 183°C. Another effect was determined by adding a small amount of Zr. This small amount was enough to shift the crystallization temperature (${T}_c$) and the melting temperature (${T}_m$) of PU from 125 to 129°C and from 150 to 144°C, respectively.

Effect of Mo and Bi on Mechanical Properties of Zr-Fe-Cr Alloy at Room Temperature

2013 ◽  
Author(s):  
B. F. Luan ◽  
L. Q. Yang ◽  
T. G. Wei ◽  
K. L. Murty ◽  
C. S. Long ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Room Temperature ◽  
Mechanical Performance ◽  
Microstructure Observation ◽  
Scanning Electron ◽  
Zr Alloy

To investigate the effects of Mo and Bi on mechanical properties of a Zr-Fe-Cr alloy at room temperature, seven Zr-Fe-Cr-Mo-Bi alloys with different compositions were designed. They were subjected to a series of rolling processes and heat treatments, and then sampled to measure mechanical properties by hardness and tensile test and to characterize microstructures by scanning electron microscope (SEM) and electron channel contrast (ECC) technique. Results indicated that among them two types of Zr-Fe-Cr-Mo-Bi alloys achieve the designed goals on mechanical properties and have the following advantages: (i) the hardness of the alloys, up to 334HV after annealing, is 40% higher than traditional Zr-4. (ii) The yield strength (YS) and ultimate tensile strength (UTS) of the alloys are 526 MP a and 889 MP a after hot rolling and annealing, markedly higher than the traditional Zr alloy. (iii) Good plasticity of the new Zr-Fe-Cr-Mo-Bi alloy is obtained with about 40% elongation, which is greatly higher than the Zr-Fe-Cr-Mo alloy thanks to the addition of Bi offsetting the disadvantage of addition Mo. Furthermore, according to observations of the microstructure observation, the reasons of the effect of the Mo and Bi elements on the mechanical performance of Zr-Fe-Cr alloy were studied and discussed.

Application of SMA on the Alloy of Nylon6/ABS

2012 ◽  
Vol 501 ◽  
pp. 57-63
Author(s):  
Chao Wang ◽  
Ying Chun Li ◽  
Zhen Xing Yao
Keyword(s):  
Tensile Strength ◽  
Electron Microscope ◽  
Mechanical Characteristics ◽  
Acrylonitrile Butadiene Styrene ◽  
Mechanical Analysis ◽  
Melt Blending ◽  
Styrene Maleic Anhydride ◽  
The Impact ◽  
Scanning Electron ◽  
Butadiene Styrene

The alloy of Nylon6/Acrylonitrile-Butadiene-Styrene (ABS) with styrene-maleic anhydride (SMA) was prepared by melt blending as the compatilizer. Mechanical characteristics, dynamic mechanical analysis (DMA) and fracture appearances were determined. It was found that the impact and tensile strength firstly increased and then decreased along with the increase of the SMA content. The properties reached maximum values when the content of SMA was 2%. The results of DMA and scanning electron microscope (SEM) indicated that the addition of SMA can effectively enhance the compatibility of Nylon6 and ABS.

Effect of Nanocellulose Loading on Tensile Properties of Nitrile Rubber

2017 ◽  
Vol 264 ◽  
pp. 112-115
Author(s):  
Erfan Suryani Abdul Rashid ◽  
Wageeh Abdulhadi Yehye ◽  
Nurhidayatullaili Muhd Julkapli ◽  
Sharifah Bee O.A. Abdul Hamid
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Tensile Test ◽  
Tensile Properties ◽  
Mechanical Performance ◽  
Butadiene Rubber ◽  
Fracture Surfaces ◽  
Scanning Electron

Nanocellulose (NCC) is incorporated into nitrile butadiene rubber (NBR) latex with the composition 0 to 5 phr using dipping method. Mechanical properties of NBR/NCC composites using tensile test was used to characterize their mechanical performance and the fracture surfaces post tensile test were studied. The tensile strength of NBR/NCC composites increase significantly with the addition of nanocellulose. This could be anticipated due to the presence of Van der Waals interaction between hydrophilic natures of nanocellulose with hydrophobic of NBR consequently limits the tearing propagation. The result was supported with the fracture surfaces morphology viewed under Fourier Emission Scanning Electron Microscopy (FESEM).

scholarly journals Synchronously Strengthen and Toughen Polypropylene Using Tartaric Acid-Modified Nano-CaCO3

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2493
Author(s):  
Junlong Yao ◽  
Hanchao Hu ◽  
Zhengguang Sun ◽  
Yucong Wang ◽  
Huabo Huang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Impact Toughness ◽  
Tartaric Acid ◽  
High Performance ◽  
Mechanical Performance ◽  
Low Cost ◽  
Complexing Agent ◽  
Environmental Technology ◽  
The Impact ◽  
First Time

In order to overcome the challenge of synchronously strengthening and toughening polypropylene (PP) with a low-cost and environmental technology, CaCO3 (CC) nanoparticles are modified by tartaric acid (TA), a kind of food-grade complexing agent, and used as nanofillers for the first time. The evaluation of mechanical performance showed that, with 20 wt.% TA-modified CC (TAMCC), the impact toughness and tensile strength of TAMCC/PP were 120% and 14% more than those of neat PP, respectively. Even with 50 wt.% TAMCC, the impact toughness and tensile strength of TAMCC/PP were still superior to those of neat PP, which is attributable to the improved compatibility and dispersion of TAMCC in a PP matrix, and the better fluidity of TAMCC/PP nanocomposite. The strengthening and toughening mechanism of TAMCC for PP involves interfacial debonding between nanofillers and PP, and the decreased crystallinity of PP, but without the formation of β-PP. This article presents a new applicable method to modify CC inorganic fillers with a green modifier and promote their dispersion in PP. The obtained PP nanocomposite simultaneously achieved enhanced mechanical strength and impact toughness even with high content of nanofillers, highlighting bright perspective in high-performance, economical, and eco-friendly polymer-inorganic nanocomposites.

Recycling of Polypropylene Based Car Bumpers: Mechanical and Morphological Analysis

2003 ◽  
Vol 19 (1) ◽  
pp. 1-16 ◽  
Author(s):  
G. Ragosta ◽  
P. Musto ◽  
P. Russo ◽  
G. Camino ◽  
L. Di Maio
Keyword(s):  
Electron Microscopy ◽  
Morphological Analysis ◽  
Dispersed Phase ◽  
Mechanical Parameters ◽  
Recycling Process ◽  
Polypropylene Matrix ◽  
Mechanical Performances ◽  
The Impact ◽  
Considerable Enhancement ◽  
Scanning Electron

The recycling of new and ten years old bumpers either painted or unpainted have been investigated. They were made by a polypropylene matrix and an ethylene-propylene rubber copolymer as dispersed phase. Mechanical testing carried out before reprocessing showed a dramatic loss in the tensile and impact properties of aged bumpers with respect to the new items. The recycling further reduces the mechanical performances of these items while it has only a little effect on the properties of new bumpers. The addition of appropriate stabilising agents, during the recycling process of aged bumpers, produced an enhancement of the whole mechanical parameters. In particular the impact strength reached values typical of very tough materials and close to those of new items. Scanning electron microscopy of the fracture surfaces showed a considerable enhancement of matrix plasticity when stabilisers were used.

scholarly journals MICRO-MECHANICAL PERFORMANCE OF CONCRETE USED AS RECYCLED RAW MATERIAL IN CEMENTITIOUS COMPOSITE

2017 ◽  
Vol 13 ◽  
pp. 55 ◽  
Author(s):  
Vladimír Hrbek ◽  
Veronika Koudelková ◽  
Zdeněk Prošek ◽  
Pavel Tesárek
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Industrial Pollution ◽  
Mechanical Performance ◽  
Structural Parameters ◽  
Raw Material ◽  
Cementitious Composite ◽  
X Ray ◽  
The Impact ◽  
Scanning Electron

The reduction of industrial pollution is recently one of main goals over all fields. In civil engineering, re-cycling of structural waste provides wide opportunity contributing this effort. This paper focus on re-use of concrete waste, which after further processing can be used in new constructions as partial supplement to the mixture. To investigate the impact of re-cycled concrete addition, it is necessary to determine mechanical and structural parameters of individual phases in the “raw” material. For this purpose, grid indentation and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM, EDX) are combined to determine properties of concrete sample.

Hydroscopic and Mechanical Properties Performance Analysis of Rice Husk Powder/PLA Composites

2011 ◽  
Vol 230-232 ◽  
pp. 1231-1235 ◽  
Author(s):  
Jin Hua ◽  
Zhi Min Zhao ◽  
Wei Yu ◽  
Ben Zheng Wei
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Material ◽  
Lactic Acid ◽  
Electron Microscope ◽  
Rice Husk ◽  
Coupling Agent ◽  
Melt Blending ◽  
Water Absorbability ◽  
Scanning Electron

The rice husk powder was modified by polymer (lactic acid) (PLA) and Maleic anhydride (coupling agent, MAPP). Composite material was prepared in the way of melt blending. The mechanical properties, water absorbability of rice husk/polymer (lactic acid) (PLA) composites, and the relations between these properties and microscopic characteristics were investigated. The result showed that, with the increasing content of rice husk power, the maximum bearable tension and tensile strength increased; Water absorbability after 2 hours’ immersion hadn't significant change, but after 24 hours’ immersion, the water absorbing capacity had obvious addition. The study also showed that coupling agent could significantly reduce the water absorbability of composite materials; The use of scanning electron microscope (SEM) found that the interface became smoother, the adhesion between PLA and rice husk powder became closer when add the coupling agent to the rice husk powder, it also could well explain the differences between water absorbability and mechanical properties.

The impact properties of a polyamide 6– polytetrafluoroethylene composite

2009 ◽  
Vol 224 (1) ◽  
pp. 13-17 ◽  
Author(s):  
J Li ◽  
Y F Zhang
Keyword(s):  
Electron Microscope ◽  
Interfacial Adhesion ◽  
Polyamide 6 ◽  
Continuous Phase ◽  
Dispersed Phase ◽  
Screw Extruder ◽  
Impact Properties ◽  
Twin Screw ◽  
The Impact ◽  
Scanning Electron

Polyamide 6 (PA6)-filled polytetrafluoroethylene (PTFE) at different compositions has been successfully prepared in a corotating twin screw extruder where PTFE acts as the polymer matrix and PA6 as the dispersed phase. The morphology and impact properties of these blends were investigated using a scanning electron microscope. The presence of PA6 particles dispersed in the PTFE continuous phase exhibited a coarse morphology. Increasing PA6 contents in the blend improved the impact properties at weak deformation. It was found that the interfacial adhesion played an important role in the creation of an interphase that was formed by the interaction between the PTFE and PA6. This induced an improvement in impact properties. In addition, the optimum impact properties were obtained when the content of PA6 is 30 vol%.

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