scholarly journals INVESTIGATION OF IMPACT OF CROSSLINKING AGENTS ON CHARACTERISTICS OF SPATIAL NET AND PROPERTIES OF STYRENE-ACRYLIC POLYMER FILMS

2018 ◽  
Vol 61 (7) ◽  
pp. 68
Author(s):  
Inna Slepchuk ◽  
Olga Ya. Semeshko ◽  
Tatiana S. Asaulyuk ◽  
Yuliya G. Saribekova
Keyword(s):  
Mechanical Properties ◽  
Polymer Film ◽  
Polymer Films ◽  
Crosslinking Agent ◽  
Hydrolytic Degradation ◽  
Physical And Mechanical Properties ◽  
Acrylic Polymer ◽  
The Individual ◽  
High Degree ◽  
Crosslinking Agents

The influence of crosslinking agents on the characteristics and properties of films from aqueous dispersions of styrene-acrylic polymers Lacritex 309, 430 and 640 was studied in order to obtain coatings on textile materials. Mono-, di- and triglycidyl esters are chosen as crosslinking agents. The choice of aqueous dispersions of polymers and crosslinkers is due to strict environmental requirements for textile products. By determining the amount of aceton-insoluble fractions of the formed polymer films, it was determined that the incorporation of crosslinkers is required in the Lacritex dispersion 640, and the films based on Lacritex 430 and 309 are distinguished by a high degree of intermolecular crosslinking. Optimum concentrations of crosslinkers have been established, which provide a high degree of curing of Lacritex 640. Using the sol-gel method, the structural parameters of the spatial nets of styrene-acrylic polymers (the part of sol fraction, the degree of crosslinking, the part of active chains, the average molecular weight of the chain segment, the crosslink density) were calculated. The polymer films from the individual polymer Lacritex 430 have the highest indexes of physic mechanical characteristics. Lacritex 640/Laproxide 703 compositions can be used as polymer matrixes for textile materials. The formation of crosslinks of hydroxyl and carboxyl groups of the styrene-acrylic polymer with epoxy groups of the crosslinking agent was confirmed by IR spectroscopy. The investigation of the effect of water and soap-soda treatments at various temperatures shows that the films under study have high resistance to water and soap-soda solution. The results of investigation of the tensile strength, the elongation at break, the hardness of the coating surface by the Koenig method and the stickiness according to the FINAT method (Test Method Number 9) of the formed polymer films indicate high physical and mechanical properties such as increased mechanical strength and elasticity, reduced hardness and tackiness. Thus, based on the studies carried out, it can be concluded that the individual styrene-acrylic Lacritex polymers 309 and 430 provide the formation of a strong three-dimensional spatial structure of the polymer film and can be used without crosslinking agents. The use of Lacritex 640 is possible in the composition together with the Laproxide 703 crosslinking agent at an optimum concentration of 4%. A polymer film based on this composition has a high degree of crosslinking, and as a result, increased resistance to organic solvents, reduced hydrolytic degradation at high temperatures, and increased physico-mechanical properties. A polymer film based on this composition has a high degree of crosslinking, hence, has increased resistance to organic solvents, reduced hydrolytic degradation at high temperatures, and increased physical and mechanical properties. Forcitation:Slepchuk I., Semeshko O.Ya., Asaulyuk T.S., Saribekova Yu.G. Investigation of impact of rosslinking agents on characteristics of spatial net and properties of styrene-acrylic polymer films. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 67-75

Theory and Simulation of Polymers at Interfaces

MRS Bulletin ◽  
1997 ◽  
Vol 22 (1) ◽  
pp. 13-15 ◽  
Author(s):  
Anna C. Balazs
Keyword(s):  
Mechanical Properties ◽  
Polymer Films ◽  
Colloidal Particles ◽  
Structural Integrity ◽  
Solid Surfaces ◽  
Polymer Layer ◽  
Polymer Interfaces ◽  
New Materials ◽  
Immiscible Polymers ◽  
The Individual

The articles in this issue illustrate how various theoretical and computer models have been used to probe behavior of polymers at penetrable and impenetrable interfaces. Interest in polymer interfaces stems from the control interfaces commonly have over macroscopic properties—such as the strength or biocompatibility of the material. Consider the “alloying” or blending of existing polymers. This technique provides an inexpensive means of fabricating new materials that can display the desirable properties of the individual components. Most polymer pairs however are immiscible, and the mixture segregates into macroscopic domains separated by relatively weak interfaces. To enhance the structural integrity of the blend, copolymer “compatibilizers” are added to the mixture. These chains localize at the interface between the immiscible polymers, enhance the adhesion between the phase-separated regions, and thereby improve the mechanical properties of the blend.On an impenetrable interface, polymer films or coatings are commonly used to modify the properties of the underlying substrate. For example the polymer layer can be utilized to tailor biocompatibility, wettability, or roughness of the surface. Polymers anchored to solid surfaces can also be used to control the interaction between these surfaces. Thus the tethered layer can promote the adhesion between dissimilar solids or prevent the aggregation of colloidal particles.

scholarly journals Studying the similarities of deformation properties of leather materials in the process of creating a model of shoes

2020 ◽  
Author(s):  
Maryna Leshchyshyn Mykolaivna ◽  
Svitlana Stepanivna Garkavenko ◽  
Antonina Ivanivna Babich
Keyword(s):  
Mechanical Properties ◽  
Marketing Research ◽  
Physical And Mechanical Properties ◽  
Experimental Tests ◽  
Practical Significance ◽  
Preliminary Measurement ◽  
Parameters Selection ◽  
Wet Friction ◽  
Deformation Properties ◽  
The Individual

Determination of values and dependencies of deformation and physical and mechanical properties of materials of shoe models and finished products. According to the results of theoretical, analytical and marketing research, a number of experimental tests of materials have been carried out to prove the practical significance of the work, namely tests for: deformation of the vamp part of the product, uniaxial and biaxial stretching, bending, dry and wet friction, adhesion, elongation and tearing. There has been established the nature of the distribution of the total elongations of the samples of the vamps cut from different areas of the leather, as well as the ability of the leather material to be formed when improving the shape of the product or changing the shape of the shoetree. The processes of deformation of the vamp part of shoe blanks, physical and mechanical properties of different groups of modern materials and values analysis of similarity of their deformation properties have been studied. There has been created a working model-transformer for carrying out preliminary measurement of clients’ feet at the individual order. The expediency of these works has been proved experimentally. A working version of a model-transformer for foot measurements has been made and as a result of the works approbation, a sample of shoes has been made. The ergonomic properties of the manufactured footwear have been improved due to the use of materials with enhanced physical and mechanical properties. The article investigates the deformation of the most vulnerable vamp part of the men's model of a typical model, as well as the physical and mechanical characteristics of leather materials for manufacturing models and shoes of this type. Providing high quality and comfort of footwear, accuracy of parameters selection of foot measurement, zones of beams and achievement of form stability of footwear with a top from genuine leathers has been predicted.

Structural Design and Experimental Study of a New Vacuum Vulcanizing Machine

2013 ◽  
Vol 427-429 ◽  
pp. 166-169
Author(s):  
Cai Jun Liu ◽  
Xu Juan Wang ◽  
Xu Wei
Keyword(s):  
Mechanical Properties ◽  
Structural Design ◽  
Production Efficiency ◽  
Physical And Mechanical Properties ◽  
Structure Characteristics ◽  
High Production Efficiency ◽  
New Type ◽  
High Production ◽  
High Degree ◽  
Machine Structure

This paper introduces a new type vacuum vulcanizing machine structure characteristics, the machine can realize the automatic mold, mold release, flip, ejector, has a high degree of automation, high precision products, high production efficiency; and to study the model of vacuumizing plate vulcanizing machine and physical and mechanical properties of ordinary vulcanization machine the influence of the vulcanizate by experiment.

scholarly journals ВПЛИВ ХІМІЧНОЇ БУДОВИ ЗШИВАЮЧИХ АГЕНТІВ НА ФІЗИЧНІ ВЛАСТИВОСТІ ПОЛІМЕРНИХ ПЛІВОК НА ОСНОВІ КРОХМАЛЮ

2018 ◽  
Vol 122 (3) ◽  
pp. 19-24
Author(s):  
Т. С. Асаулюк ◽  
О. Я. Семешко ◽  
Ю. Г. Сарібєкова
Keyword(s):  
Physical Properties ◽  
Tartaric Acid ◽  
Polymer Films ◽  
Chemical Structure ◽  
Practical Importance ◽  
Crosslinking Agent ◽  
Physicomechanical Properties ◽  
Polymer Materials ◽  
Atmospheric Moisture ◽  
Crosslinking Agents

To study the effect of active functional groups of cross-linking agents on the physical properties of starch polymer films. Standardized methods for studying the indicators of physical properties of polymer films have been applied. The paper presents the results of the study of the effect of crosslinking agents of different chemical structure on the physicomechanical properties, the influence of atmospheric moisture and the resistance to wet treatments of starch polymer films. An improvement in studied parameters of the films with the use of L-tartaric acid was established. It has been proved that the use of L-tartaric acid as a crosslinking agent makes it possible to improve the physical properties of polymer films based on starch. The obtained experimental results are of practical importance for the development of new environmentally friendly polymer materials.

scholarly journals Quartz Reinforced Unsaturated Polyester Resin Composites: Preparation and Characterization

2021 ◽  
pp. 14-25
Author(s):  
Sujan Kanti Das ◽  
Mithun Rani Nath ◽  
Rajib Chandra Das ◽  
Manas Mondal ◽  
Snahasis Bhowmik
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Polyester Resin ◽  
Adhesion Force ◽  
Unsaturated Polyester ◽  
Physical And Mechanical Properties ◽  
Thermal Characterization ◽  
Unsaturated Polyester Resin ◽  
Quartz Content ◽  
The Individual

Compression molding has produced quartz-reinforced polyester composites (QPCs) weighing 10 to 40 per cent quartz relative to the weight of unsaturated polyester resin. Synergistic changes were made in the composite properties and were superior to those of the individual components. The composite's physical and  mechanical properties such as bulk density, water absorption , tensile strength, flexural strength, hardness have illustrated the competency of the composite being developed. It was found that for the resultant composite examined, the percentage of water absorption is very small. However, when quartz content were increased, water absorption grew very slowly. Enhancement of mechanical properties strongly corresponds to strong adhesion force of quartz with the matrix and it influenced by well-disperse quartz particles on the whole surface of composite. This paper also performed thermal characterization of the composites. Because of these remarkable properties, as prepared composite can find applications in packaging, fuel cell, solar cell, structural materials and households purposes.

One-Component Urethane Sealants Synthesis

2020 ◽  
Vol 869 ◽  
pp. 152-157
Author(s):  
Irina V. Zhukova ◽  
Aleksandr A. Tabachkov ◽  
Svetlana N. Ivanova ◽  
Ilnar A. Valeev
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Methyl Iodide ◽  
Physical And Mechanical Properties ◽  
Imine Group ◽  
Cure Time ◽  
Activating Agent ◽  
Crosslinking Agents

It is proposed to synthesize one-component light-resistant urethane compositions using aldimines as crosslinking agents and methyl iodide as an activating agent to obtain sealants. The effect of the methyl iodide activator and the quaternized complex of the imine group and temperature on the cure time of the sealants was investigated. The influence of the polyether molecular weight and the structure of aldimines fillers on the physical and mechanical properties of the obtained sealants was studied.

scholarly journals Analysis of selected properties of warming system prepared with various plastering mortar

2018 ◽  
Vol 196 ◽  
pp. 04044
Author(s):  
Wioletta Godlewska ◽  
Artur Koper
Keyword(s):  
Mechanical Properties ◽  
Sustainable Development ◽  
Thin Layer ◽  
Physical And Mechanical Properties ◽  
Insulation System ◽  
Additional Layer ◽  
Design Build ◽  
Important Challenge ◽  
The Individual ◽  
Is Design

Nowadays, one of the most important challenge in civil construction is design, build and use buildings in sustainable development way. This article describes one of the most important thermo-modernization undertaking, which is increase of insulation of external walls. The research was prepared in special technology on samples with silicon, mineral, acrylic thin-layer plasters and with adhesive mass only. Purpose of the research was to analyze the physical and mechanical properties of the additional layer with this four variants of plastering mortar. The research, which was made by authors showed that the thin – layer plasters are characterized by resistance to environmental factors, which they are directly exposed. The connection between the individual layers of the thermal insulation system secures durability of the plasters. The samples with mineral plastering mortar were characterized by the highest interlayer adhesion

Intercalated Two-Dimensional Ceramic Nanocomposites

1992 ◽  
Vol 267 ◽  
Author(s):  
E.P. Giannelis ◽  
V. Mehrotra ◽  
O. Tse ◽  
R.A. Vaia ◽  
T.-C. Sung
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix ◽  
Physical And Mechanical Properties ◽  
Two Dimensional ◽  
Molecular Dispersion ◽  
The Individual ◽  
Synthetic Approaches ◽  
Intercalative Polymerization ◽  
Ceramic Nanocomposites

ABSTRACTNew generations of polymer-ceramic nanocomposites are being developed by intercalation of layered solids. Synthetic approaches include intercalative polymerization, direct polymer intercalation and molecular dispersion of the host layers in the polymer matrix. The unique physical and mechanical properties of the hybrids are attributed to the molecular dispersion and the synergism between the individual components.

Intercalated Two-Dimensional Ceramic Nanocomposites

1991 ◽  
Vol 249 ◽  
Author(s):  
E.P. Giannelis ◽  
V. Mehrotra ◽  
O. Tse ◽  
R.A. Vaia ◽  
T.-C. Sung
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix ◽  
Physical And Mechanical Properties ◽  
Two Dimensional ◽  
Molecular Dispersion ◽  
The Individual ◽  
Synthetic Approaches ◽  
Intercalative Polymerization ◽  
Ceramic Nanocomposites

ABSTRACTNew generations of polymer-ceramic nanocomposites are being developed by intercalation of layered solids. Synthetic approaches include intercalative polymerization, direct polymer intercalation and molecular dispersion of the host layers in the polymer matrix. The unique physical and mechanical properties of the hybrids are attributed to the molecular dispersion and the synergism between the individual components.

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