scholarly journals Preparation, Thermal, and Mechanical Characterization of UV-Cured Polymer Biocomposites with Lignin

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1159
Author(s):  
Marta Goliszek ◽  
Beata Podkościelna ◽  
Tomasz Klepka ◽  
Olena Sevastyanova
Keyword(s):  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Polymer Network ◽  
Positive Influence ◽  
Hydroxyl Groups ◽  
Reactive Diluent ◽  
Carbonyl Groups ◽  
Waste Generation ◽  
Acrylate Monomers

The preparation and the thermal and mechanical characteristics of lignin-containing polymer biocomposites were studied. Bisphenol A glycerolate (1 glycerol/phenol) diacrylate (BPA.GDA) was used as the main monomer, and butyl acrylate (BA), 2-ethylhexyl acrylate (EHA) or styrene (St) was used as the reactive diluent. Unmodified lignin (L) or lignin modified with methacryloyl chloride (L-M) was applied as an ecofriendly component. The influences of the lignin, its modification, and of the type of reactive diluent on the properties of the composites were investigated. In the biocomposites with unmodified lignin, the lignin mainly acted as a filler, and it seemed that interactions occurred between the hydroxyl groups of the lignin and the carbonyl groups of the acrylates. When methacrylated lignin was applied, it seemed to take part in the creation of a polymer network. When styrene was added as a reactive diluent, the biocomposites had a more homogeneous structure, and their thermal resistance was higher than those with acrylate monomers. The use of lignin and its methacrylic derivative as a component in polymer composites promotes sustainability in the plastics industry and can have a positive influence on environmental problems related to waste generation.

Characterization of Medium Density Particleborads Using Agricultural Residues

2015 ◽  
Vol 1088 ◽  
pp. 656-659
Author(s):  
Ivaldo D. Valarelli ◽  
Rosane A.G. Battistelle ◽  
Barbara Stolte Bezerra ◽  
Luiz A. Melgaço N. Branco ◽  
Eduardo Chahud ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Castor Oil ◽  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Raw Materials ◽  
Construction Materials ◽  
Agricultural Residues ◽  
Medium Density ◽  
Polyurethane Resin

In recent years the production of products derived from wood and bamboo are increasing, due to the search for a more rational exploitation of these raw materials. Amongst these products, the particleboards production combine sustainability and rationality in the use of these materials. In this context, this work has the objective to study the application of alternative raw materials in the manufacture of Medium Density Particleboards (MDP), using residues from industrial processimg of coffee and bamboo. MDP had been produced with particles of giganteus bamboo of the Dendrocalamus species and particle of coffee rind in the intermediate layer of the particleboard, bonded with polyurethane resin based on castor oil. The physical and mechanical characterization was carried out accordingly to NBR 14810-3 (2006). The physical properties evaluated were: of water absorption for 2h and 24h; thickness swallowing for 2h and 24h; density, humidity content. The mechanical properties evaluated were: Tensile strength, static bending (MOR and MOE). The results were compared with NBR 14810-2 (2006) and also with the ANSI A208-1 (1993). The physical performance of these particleboards was below the values recommend by the Brazilian norm. Also the mechanical characteristics are not improve, demonstrating that the inclusion of coffee rind did not benefit the physical characteristics and nor the mechanical ones. However it can be used as construction materials for partitions and ceiling panels.

Growth Kinetics and Mechanical Characterization of a Hard Boron Coating on a Tool Steel

2017 ◽  
Vol 380 ◽  
pp. 29-34 ◽  
Author(s):  
D. Sánchez Huerta ◽  
N. López Perrusquia ◽  
I. Hilerio Cruz ◽  
M.A. Doñu Ruiz ◽  
E.D. García Bustos ◽  
...  
Keyword(s):  
Activation Energy ◽  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Chemical Elements ◽  
Thermochemical Treatment ◽  
X Ray Diffraction ◽  
X Ray ◽  
Optimal Classification

The mechanical characteristics are determined to a FeB/Fe2B coating applied in AISI L6 steel tool and blades make to cut paper. The thermochemical treatment was applied at temperatures of 1173, 1223 and 1273 K with permanence time of 0.5, 2 and 3 h for each temperature. The diffusion coefficient and activation energy for each phase is obtained for this boron coating on an AISI L6 steel. HRC test were made to establish the type of adherence (qualitative) and comparing with the VDI 3198 standard and the results were obtaining optimal classification of HF1-HF2 in condition for 3h of the three temperatures. The result by nanoidentation show hardness of 1000 - 2000 HV as well as the Young's modulus for each present phase of the coating. Through micrographs (SEM) are showing thicknesses up to 79.52 ± 18.82 μm for FeB and 97.80 ± 20.01μm for Fe2B, a morphology sawn ́s type is evidence. Through EDS and x-ray diffraction are used to show the chemical elements formed.

Research review of diversified reinforcement on aluminum metal matrix composites: fabrication processes and mechanical characterization

2018 ◽  
Vol 25 (4) ◽  
pp. 633-647 ◽  
Author(s):  
Jitendra M. Mistry ◽  
Piyush P. Gohil
Keyword(s):  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Aluminum Matrix ◽  
Research Review ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Aluminum Metal ◽  
Future Work ◽  
Aluminum Metal Matrix Composites

AbstractThis paper presents a research review on fabrication processes and mechanical characterization of aluminum matrix composites (AMCs), which have found application in structural, electrical, thermal, tribological, and environmental fields. A comprehensive literature review is carried out on various types of fabrication processes, the effects of individual reinforcement and multiple reinforcements, its percentage, size, temperature, processing time, wettability, and heat treatment on the mechanical characterization of AMCs including different product applications. Various models and techniques proposed to express the mechanical characteristics of AMCs are stated here. The concluding remarks addresses the future work needed on AMCs.

Local Mechanical Characterization of Human Teeth by Instrumented Indentation

2010 ◽  
Vol 89-91 ◽  
pp. 751-756 ◽  
Author(s):  
Ilaria Cappelloni ◽  
Paolo Deodati ◽  
Roberto Montanari ◽  
Andrea Moriani
Keyword(s):  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Damping Factor ◽  
Good Resolution ◽  
Instrumented Indentation ◽  
Mechanical Spectroscopy ◽  
Human Teeth ◽  
Indentation Tests ◽  
Cylindrical Punch

The mechanical characteristics of dentine have been investigated on local scale by micro-hardness and instrumented indentation tests. FIMEC, an indentation technique employing a cylindrical punch, permitted measurements of elastic modulus, yield stress, stress-relaxation and creep. The punch diameter (Φ = 0.5 mm) is much larger than the tubule size thus data are not so largely scattered as in micro- and nano-indentation tests but, at the same time, is small enough to guarantee a good resolution in mapping the mechanical properties in different tooth positions. The results are in agreement with literature data obtained by means of various experimental techniques. Furthermore, through tests of mechanical spectroscopy carried out on bar-shaped samples (13 mm x 4 mm x 0.8 mm) the dynamic modulus and the damping factor Q-1 have been measured.

Microstructural and Mechanical Characterization of ARB AZ31

2013 ◽  
Vol 765 ◽  
pp. 403-407 ◽  
Author(s):  
Friederike Schwarz ◽  
Katja Lange ◽  
Lutz Krüger ◽  
Rudolf Kawalla ◽  
Stephan Reichelt
Keyword(s):  
Grain Size ◽  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Basal Texture ◽  
Electron Backscattered Diffraction ◽  
Roll Bonding ◽  
Average Grain Size ◽  
Twin Roll Cast ◽  
Twin Roll

In this work the influence of accumulative roll bonding (ARB) process on the microstructure and the mechanical characteristic is investigated. Therefore, AZ31 magnesium sheets were successfully deformed through ARB for a maximum of three passes. Twin roll cast sheets and twin roll cast sheets with subsequent heat treatment (480 °C, 1 h) were used as initial materials. After one ARB pass, the highest microstructure changes were measured. Electron backscattered diffraction (EBSD) reveals a bimodal microstructure with an average grain size of ~1µm. In comparison to the initial material a strong basal texture was measured. The significant refinement of grain size after severe plastic deformation cause an increase of tensile and compressive strength, e.g. rising yield stress and ultimate tensile strength of 42% and 15%, respectively. However, the maximum formability remains nearly at the same level. Further ARB passes do not improve the mechanical characteristics further.

FEM Simulation of the Thermo-Mechanical Behavior of TSV 3D MEMS Structure

2013 ◽  
Vol 562-565 ◽  
pp. 108-113 ◽  
Author(s):  
Xin Gong ◽  
Jing Chen ◽  
Jong Ho Lee
Keyword(s):  
Mechanical Behavior ◽  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Fem Simulation ◽  
Critical Issue ◽  
Fine Pitch

As pitch of TSV shrinks down, mechanical characteristics of TSVs become more complicated and the heat of chip becomes a critical issue. The objective of this paper is to study thermal mechanical characteristics of ultra-fine pitch TSV. The thermal-mechanical characterization of an ultra-fine pitch chip is simulated with FEA.

scholarly journals Mechanical Characterization of Two Blends PP+PA6+EPDM. Part 2. Results of Tensile Tests

2021 ◽  
Author(s):  
George Ghiocel Ojoc ◽  
Larisa Chiper Titire ◽  
Ana Maria Musteață ◽  
Mihail Boțan ◽  
George Catalin Cristea ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Tensile Tests ◽  
Polyamide 6 ◽  
Sem Analysis ◽  
Matrix Inversion ◽  
Potential Candidate ◽  
Resistant Material ◽  
Test Speed

This paper presents the values of several mechanical characteristics for two blends: H (60% PP + 12% PA6 + 8% EPDM + 20% Polybond 3200) and G (20% PP + 42% PA6 + 28% EPDM + 10% Polybond 3200) (%wt), comparing them to those of PP (polypropylene) and PA6 (polyamide 6). The adding of EPDM (ethylene propylene diene monomer rubber) and Polybond 3200 help reducing the disadvantages of simple blends made of PP+PA6, when the PA6 concentration allows for having a PA6 matrix with droplets of PP. SEM analysis helps for understanding the performance of material G as compared to the neat polymers. EDX analysis proved that there was a matrix inversion, material H having a PP matrix and material G a matrix made of PA6 with droplets of PP. Strain at break for PP and material H were proved to be insensitive to test speed, but materials G and PA6 had large value for strain at break and energy at break for v = 10 mm/min. Taking at basis the values for polyamide 6 (PA6), material G has greater values for energy at break: with 97.8% for v = 10 mm/min, with 29.5% for v= 250 mm/min and with 98% for 1000 mm/min, without exhibiting the micro and macro cavitation of PA6. This means that the recipe, the technology and the mechanical characteristics make material G a potential candidate for applications where a low and moderate impact resistant material is required.

scholarly journals Mechanical characterization of composites polyester moulding reinforced waste metal lathes with standard ASTM D 638-lll modification

2019 ◽  
Author(s):  
Iswandi Idris ◽  
Ruri Aditya Sari
Keyword(s):  
Mechanical Characteristics ◽  
Impact Test ◽  
Mechanical Characterization ◽  
Elastic Behaviour ◽  
Test Results ◽  
Proportional Limit ◽  
Voltage Level ◽  
Polyester Composite ◽  
Test Impact

Scope and Objectives of this research are: To improve the mechanical characteristics of polyester composite fabricated waste metal lathe and Styrofoam through tensile test, compression test, impact test, obtain a new note for developing new composite materials by use wastemetal lathe and plastic waste Styrofoam in order not to waste. from the test results obtained tensile strength 0.66 kg f/ mm2, greatest moment 5,490 kg f.m, greatest stress 1.93 kg f/ mm2, strain 0.17093 m/m and bending angle 167.64. The breakpoints of the composite specimen in which the waste lathe located is at 0.65, the elastic behaviour seen from the number 0 to the 1.06 proportional limit, then at the voltage level 1.1 of the plastic behaviour and the 1.633 level has undergone plastic deformation until the breakpoints. The charphy impact implies 110 (J / mm 2). From the experimental results showed that the composite fabric waste has good mechanical properties.

scholarly journals Mechanical characterization of buckwheat noodles mixed with seaweed (fu-nori)

Fagopyrum ◽  
1970 ◽  
Vol 36 (1) ◽  
pp. 5-9
Author(s):  
Yuya Asami ◽  
Sena Ooto ◽  
Masanori Kitamura ◽  
Kenta Sakanashi ◽  
Tesshu Tamai ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Mechanical Characterization ◽  
Mechanical Analysis ◽  
Breaking Stress ◽  
Common Buckwheat ◽  
Endogenous Protein

The present study was conducted to clarify the effect of incorporation of seaweed, i.e.funori (Gloiopeltis tenax(Turner)J. Agardh) into buckwheat noodles on their mechanical characteristics. Mechanical analysis of buckwheat noodles withfunori showed that incorporation of funori into buckwheat noodles enhanced breaking stress and energy. On the otherhand, incorporation of funori into buckwheat noodles enhanced decreased solubility of the albumin plus globulin frac­tion. The present study findings suggest that the endogenous protein may be an important factor responsible for themechanical characteristics of buckwheat noodles with seaweed.Received: December 5, 2018; accepted: January 30, 2019Keywords: common buckwheat, mechanical characteristics, noodles, seaweed

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