scholarly journals Application of 4,4'-dihydroxydiphenylsulfone and its polymethylol derivative as additives in elastomeric materials

2021 ◽  
pp. 66-72
Author(s):  
Yu.M. Kobelchuk ◽  
◽  
Yu.N. Vashchenko ◽  
L.S. Holub
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Phenol Formaldehyde ◽  
Heterogeneous Systems ◽  
Lower Degree ◽  
Reaction Products ◽  
Environmental Friendliness ◽  
Elastomeric Matrix ◽  
Elastomeric Materials

One of the ways to improve the quality of elastomeric materials is the modification of the elastomeric matrix as well as the use of multifunctional ingredients that can function as stabilizers, vulcanizing group components and compatibilizers (i.e. substances that increase compatibility in polymer heterogeneous systems). Compounds that can be used as binders in composite materials of different composition and ensure the environmental friendliness of their production and application are considered to be promising. Among such compounds, the reaction products of 4,4'-dioxydiphenylsulfone with formaldehyde attract a particular interest since they have a lower degree of toxicity than the phenol-formaldehyde resins. This work revealed the effect of 1, 2, and 4 parts by weight of 4,4'-dihydroxydiphenylsulfone and its polymethylol derivative on technological and physical-mechanical properties of elastomeric compositions. We showed the stabilizing activity of the investigated additives in rubbers based on carbochain unsaturated rubbers. The surface of the crushed vulcanizate was modified. It was determined that the addition of modified crushed vulcanizate to the composition of rubber mixtures improves the quality of rubbers. We showed the possibility of replacing traditional anti-aging agents without deterioration of the properties of finished products.

Short Carbon Fibers Composites With High Filler Contents Rheology and Mechanical Properties

1999 ◽  
Author(s):  
Y. Schmitt ◽  
C. Paulick ◽  
Y. Bour ◽  
F. X. Royer
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Tensile Test ◽  
Carbon Fibers ◽  
Polymer Materials ◽  
Complex Geometries ◽  
Small Ratio ◽  
The Matrix ◽  
Short Carbon

Abstract The control of the quality of mixture based on very short carbon fibers and epoxyde resins leads to suitable mixture for molding of complex geometries. A gain in fluidity is obtained if the suspensions are treated by ultrasounds and simultaneously stirred under vacuum. Addition in a very small ratio of microbubbles in the mixture allows to obtain a viscosity less than those of the matrix alone. For many polymer materials the gain of fluidity can be of 20 to 25% with size and concentration of the microspheres thoroughly chosen. A certain number of new resins is developped to elaborate composite materials with specific mechanical properties close to standard aluminium. Tensile test an ultimate stress are used to quantify the improvements of the mechanical properties. Fillers concentrations up to 30 % are obtained.

scholarly journals Mechanical Properties of GFR & Graphite Epoxy Polymer Composites

2020 ◽  
Vol 5 (6) ◽  
pp. 560-565
Author(s):  
A. Aakash ◽  
S. Selvaraj
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Polymer Composite ◽  
Epoxy Polymer ◽  
Significant Degree ◽  
Polymer Composite Material ◽  
Water Ingestion ◽  
Selection Of

Composite materials have the great potential and widely used as building material in numerous applications. Polymer composite material obtains the necessary properties in a controlled significant degree by the selection of strands and lattice. The properties of the materials have been selected by choosing the correct proportion of matrix and reinforcements. To build the quality of the material by expanding the fiber substance of the material. In this current examination, the mechanical properties of the glass fiber and graphite is strengthened with epoxy polymer composite were considered. Here the open embellishment method was received for the manufacture of the polymer composite The mechanical properties, for example, rigidity, compression quality, sway quality and water ingestion test was resolved according to the ASTM norms. The mechanical properties were improved as the filaments support content expanded in the grid material.

scholarly journals Influence of different sheet compositions and commercial adhesives on the performance of multilaminated plywood

2021 ◽  
Author(s):  
Carine Setter ◽  
Uasmim Lira Zidanes ◽  
Eduardo Hélio de Novais Miranda ◽  
Flávia Maria Silva Brito ◽  
Lourival Marin Mendes ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Water Absorption ◽  
Bulk Density ◽  
Phenol Formaldehyde ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Forest Species ◽  
Specific Pressure

Abstract The quality of plywood panels depends on factors such as the forest species and the adhesive used in their production, and understanding the interferences of these factors in the final properties of the plywood is of fundamental importance. The study aimed to develop multilaminate plywood panels with two forest species and two types of adhesive and to evaluate the influences of these factors (forest species and adhesive) on the physical and mechanical properties of the plywood. The panels were produced with sheets of parica and pine with two types of adhesives, urea-formaldehyde and phenol-formaldehyde, with a weight of 150 g/cm². Then, each set was pressed for 10 minutes under a specific pressure of 0.98 MPa at a temperature of 150 °C. Three panels were produced for each type of blade and adhesive, totaling four treatments. The plywood was evaluated for physical properties (humidity, bulk density, and water absorption) and mechanical properties (parallel and perpendicular static flexion and resistance to mechanical shear). The results showed that the forest species had a greater influence on physical and mechanical properties, with the best results being observed for plywood produced with pine. The panels with sheets of parica and phenol-formaldehyde adhesive showed less moisture. The apparent density of the panels should be considered as it positively influenced the mechanical properties and negatively impacted water absorption. It is concluded that the plywood produced can be used for internal and external applications. However, it is indicated for structural purposes as it did not meet the requirements of the NBR 31.000.001/2:2001.

scholarly journals Mechanical properties (Tensile, Hardness and Shock resistance) for the phenol formaldehyde resin with Epoxy resin

2019 ◽  
Vol 12 (2) ◽  
pp. 35-43
Author(s):  
Mustafa A. Rajab
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Shock Resistance

Phenolic formaldehyde (resole) resin was used at a different weight (10%, 20%, 30%, 40%), with epoxy resins at varying percentages (90%, 80%, 70%, 60%) at 20 C °. In order to study the mechanical properties (which including: Tensile strength, hardness and shock resistance), for the purpose of analysis and comparison with the mechanical properties of alloys, and the selected part for the purpose of replacing the alloy with the composite materials to reduce weight and improve mechanical properties. The results indicate improved properties with increased epoxy resins due to increased bonding between components.

Bond quality of timber in technology of the laminated board for dwelling houses

2016 ◽  
Vol 6 (3) ◽  
pp. 127-134
Author(s):  
Разиньков ◽  
Egor Razinkov
Keyword(s):  
Mechanical Properties ◽  
Strength Properties ◽  
Bond Quality ◽  
Environmental Friendliness ◽  
Timber Quality ◽  
Home Building ◽  
Harmful Substances

The article deals with laminated board production. In recent years laminated board produc-tion is widely developed for home building. Despite rather high cost of houses from such bar demand for the products grows constantly. It is because of its environmental friendliness, first, and its harmful substances within admissible level, second. Besides, the received bar as for phys-ical and mechanical properties is similar to the properties of bar from genuine wood. The tech-nology of the bar is not really difficult, but the requirements to strength properties are quite high. And first of all these requirements concern timber quality and their bond quality.

scholarly journals FIBER CUTTING MACHINE USED FOR COMPOSIT MATERIAL

2010 ◽  
Vol 13 (2) ◽  
pp. 37-48
Author(s):  
Ngan Hong Nguyen
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Geometric Parameters ◽  
Bamboo Fiber ◽  
Jute Fiber ◽  
Coconut Fiber ◽  
Cutting Machine ◽  
To Come ◽  
Kinematics Parameters

This paper proposes a structure and kinematics parameters of a fiber cutting machine, which is used to cut fibers (such as jute fiber, bamboo fiber, coconut fiber...) for composite materials. To come over this obstacle, dynamic and geometric parameters of cutting parts were calculated and studied, some fibers physico-mechanical properties and their effect in the quality of the composite materials were investigated.

Microstructural and fractographic characterization of B4C-Al cermets tested under dynamic and static loading

1989 ◽  
Vol 47 ◽  
pp. 562-563
Author(s):  
Gyeung Ho Kim ◽  
Mehmet Sarikaya ◽  
D. L. Milius ◽  
I. A. Aksay
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Static Loading ◽  
Carbon Deposition ◽  
Full Density ◽  
Unique Combination ◽  
Strong Component ◽  
Reaction Products

Cermets are designed to optimize the mechanical properties of ceramics (hard and strong component) and metals (ductile and tough component) into one system. However, the processing of such systems is a problem in obtaining fully dense composite without deleterious reaction products. In the lightweight (2.65 g/cc) B4C-Al cermet, many of the processing problems have been circumvented. It is now possible to process fully dense B4C-Al cermet with tailored microstructures and achieve unique combination of mechanical properties (fracture strength of over 600 MPa and fracture toughness of 12 MPa-m1/2). In this paper, microstructure and fractography of B4C-Al cermets, tested under dynamic and static loading conditions, are described.The cermet is prepared by infiltration of Al at 1150°C into partially sintered B4C compact under vacuum to full density. Fracture surface replicas were prepared by using cellulose acetate and thin-film carbon deposition. Samples were observed with a Philips 3000 at 100 kV.

Pengaruh Tekanan dan Penggunaan Conplast terhadap Sifat Mekanik Eternit dari Abu Cangkang Sawit

2016 ◽  
Vol 8 (15) ◽  
pp. 47-54
Author(s):  
Haspiadi Haspiadi
Keyword(s):  
Mechanical Properties ◽  
Oil Palm ◽  
Modulus Of Elasticity ◽  
Modulus Of Rupture ◽  
Palm Shell ◽  
Oil Palm Shell ◽  
Density Values ◽  
Test Result

The purpose of this research is to know the influence of pressure and use of conplast against mechanical properties which are a Modulus of Elasticity (MOE) and Modulus of Rupture (MOR) of plasterboard. The study is done because still low quality of plasterboard made from a mixture of ashes of oil-palm shell especially of the mechanical properties compared to the controls. The method of this reserach used variation of printed pressure and the addition of conplast. Test result is obtained that the highest value of Modulus of Elasticity (MOE) 90875.94 Kg/cm2, Modulus of Rupture (MOR) 61.16 Kg/cm2 and density values in generally good printed at the pressure 60 g/cm3 and the addition of conplast 25% as well as the composition of the ash of palm shell oil 40%: limestone 40%: cement 15%: fiber 5% and 300 mL of water. ABSTRAK Tujuan dari penelitian ini adalah untuk mengetahui pengaruh tekanan dan penggunaan conplast terhadap sifat mekanik yaitu kuat lentur dan keteguhan patah eternit berbahan dasar abu cangkang sawit. Penelitian ini dilakukan karena masi rendahnya mutu eternit berbahan campuran abu cangkang sawit dari bolier khususnya sifat mekanik dibandingkan dengan kontrol. Metode penelitian yang digunakan adalah dengan variasi tekanan cetak dan penambahan conplast. Hasil uji diperoleh bahwa kuat lentur tertinggi sebesar 90875,94 Kg/cm2 dan keteguhan patah sebesar 61,16 Kg/cm2, yang dicetak pada tekanan 60 g/cm3 dan penambahan conplast 25% dengan komposisi  abu cangkang sawit 40 %: kapur 40 % : semen 15 %: serat 5 % dan air 300 mL.Kata Kunci :  Abu cangkang sawit, conplast, kuat lentur, keteguhan patah.

Aging of polymer composite materials under loading. (See Beginning in #10-2020)

2020 ◽  
pp. 2-12
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Cyclic Loads ◽  
Reinforced Plastics ◽  
Water Exposure ◽  
Laboratory Conditions ◽  
Bending Loads ◽  
Moisture Conditions

A study review of aging polymer composite materials (PCM) under different heat-moisture conditions or water exposure with the sequential or parallel influence of static or cyclic loads in laboratory conditions is presented. The influence of tension and bending loads is compared. Conditions of the different load influence on parameters of carbon-reinforced plastics and glass-reinforced plastics are discussed. Equipment and units for climatic tests of PCM under loading are described. Simulation examples of indices of mechanical properties of PCM under the influence of environment and loads are shown.

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