Plastics pipes and fittings for industrial applications. Collection of data on combined chemical-resistance

2021 ◽  
Keyword(s):  
Chemical Resistance ◽  
Industrial Applications

Oxa-Michael polyaddition of vinylsulfonylethanol for aliphatic polyethersulfones

2021 ◽  
Author(s):  
Nicole Ziegenbalg ◽  
Ruth Lohwasser ◽  
Giovanni D’Andola ◽  
Torben Adermann ◽  
Johannes Christopher Brendel
Keyword(s):  
Refractive Index ◽  
High Temperature ◽  
Flame Retardant ◽  
Chemical Resistance ◽  
High Refractive Index ◽  
Industrial Applications ◽  
Interesting Class ◽  
The Common ◽  
Flame Retardant Properties

Polyethersulfones are an interesting class of polymers for industrial applications due to their unusual properties such as a high refractive index, flame-retardant properties, high temperature and chemical resistance. The common...

scholarly journals Evaluation of Dynamic Materials Procured from Waste Biomass

2011 ◽  
Vol 2011 ◽  
pp. 1-7
Author(s):  
Ashish Chauhan ◽  
Balbir Kaith
Keyword(s):  
Moisture Absorption ◽  
Chemical Resistance ◽  
Phenol Formaldehyde ◽  
Graft Copolymers ◽  
Ethyl Acrylate ◽  
Industrial Applications ◽  
Modulus Of Rupture ◽  
Waste Biomass ◽  
Dynamic Materials ◽  
Physico Chemical

Methyl acrylate (MA) monomer was graft copolymerized onto Hibiscus sabdariffa stem fiber and used to explore the additive effect of vinyl acrylate (VA) and ethyl acrylate (EA) on percentage grafting and the properties of the fiber, in binary vinyl monomeric mixtures. The graft copolymers were reinforced into phenol-formaldehyde polymer matrix to form biocomposites and characterized by FTIR, XRD, TGA, DTA, and SEM techniques. They were evaluated for physico-chemical changes in properties like moisture absorption at different relative humidity levels and chemical resistance against 1 N NaOH and 1 N HCl. These graft copolymers-reinforced biocomposites had higher mechanical strength like hardness, modulus of rupture, modulus of elasticity, and stress at the limit of proportionality. These novel materials can have numerous scientific and industrial applications for the development of technology.

Processing of Pet-Silver Nanocomposite Filaments

2016 ◽  
Vol 869 ◽  
pp. 350-355 ◽  
Author(s):  
Marcos Antônio Guerra ◽  
Neide Aparecida Mariano ◽  
Alfeu Saraiva Ramos ◽  
Maria Gabriela Nogueira Campos
Keyword(s):  
Chemical Resistance ◽  
Thermal Analyses ◽  
Crystalline Polymer ◽  
Industrial Applications ◽  
Homogeneous Distribution ◽  
Rheological Characterization ◽  
Silver Nanocomposite ◽  
Fiber Processing ◽  
Master Batch ◽  
Excellent Chemical

Nanoparticles play a fundamental role on nanocomposite properties, as they significantly increase the contact area and allow a homogeneous distribution in comparison to microparticles. Silver nanoparticles (AgNP) have been extensively used in biomedical and engineering applications due to their interesting properties, such as antibacterial activity. Polyethylene terephthalate (PET) is a semi-crystalline polymer and has excellent chemical resistance and thermal stability. Because of its remarkable properties, PET has been used in several industrial applications, such as packaging, electrical, automotive, construction and textile. The aim of this study was to prepare potential antimicrobial PET-AgNP nanocomposite filaments for textile applications. Therefore, AgNP were incorporated in the PET matrix at different concentrations (0.05; 0.10; 0.15; 0.20; 0.25; 0.30; 0.35 and 0.40%) by extruding the PET resin with specific amounts of a 10% (w/w) AgNP/PET master batch. Then, rheological characterization was carried out and filaments were produced for mechanical, optical and thermal analyses. The incorporation of up to 0.20% (w/w) of AgNP in the polymeric matrix has not significantly altered overall properties of PET nanocomposites. Moreover, the nanocomposite incorporated with 0.05% of AgNP demonstrated suitable intrinsic viscosity for fiber processing and PET-like mechanical, thermal and optical properties.

scholarly journals Experimental Evaluation of Modified Sulfur Concrete for Achieving Sustainability in Industry Applications

2018 ◽  
Vol 11 (1) ◽  
pp. 70 ◽  
Author(s):  
Margareth Dugarte ◽  
Gilberto Martinez-Arguelles ◽  
Jaime Torres
Keyword(s):  
Compressive Strength ◽  
Chemical Resistance ◽  
Chemical Properties ◽  
Industrial Applications ◽  
Northern Region ◽  
Significant Loss ◽  
Experimental Program ◽  
Portland Cement Concrete ◽  
Chemical Attack ◽  
Short Service Life

Portland cement concrete (PCC) has been the most widely used concrete in the construction industry. However, PCC has a short service life under some aggressive environments, leading to the need of costly repairs. The purpose of this research was to implement local materials to produce a modified sulfur concrete (MSC) with better performance in industrial applications. Several modified sulfur concrete mixtures were prepared using natural aggregates from the northern region of Colombia, and sulfur cement by combination of sulfur with a modifier, with the objective of achieving the best performance based on mechanical strength and chemical resistance. To achieve this purpose, an experimental program based on a k-factorial design was used to determine the optimal mix design based on the results of the compressive strength. The mixture presenting the best results was then examined further with standardized tests to determine its physical, mechanical, and chemical properties (compressive strength, abrasion resistance, bulk density, absorption, and chemical resistance). Final results showed that the sulfur concrete mixture is very resistant to chemical attack and an outstanding substitute for PCC. The results indicated that there is no significant loss in weight and no relevant variation in compressive strength after the specimens were immersed in sulfuric acid and sulfate solutions. In addition, similar results were obtained for the slabs located in chemicals plants whose conditions were assessed during a 60-day period of exposure.

ELECTRICAL RESISTIVITY MEASUREMENTS: A REVIEW

2013 ◽  
Vol 22 ◽  
pp. 745-756 ◽  
Author(s):  
YADUNATH SINGH
Keyword(s):  
Electrical Resistance ◽  
Chemical Resistance ◽  
Resistivity Measurement ◽  
Barrier Properties ◽  
Ceramic Materials ◽  
Industrial Applications ◽  
Thermal Barrier ◽  
Thermal Anomalies ◽  
Resistivity Measurements ◽  
Inspection Techniques

World-wide interest on the use of ceramic materials for aerospace and other advanced engineering applications, has led to the need for inspection techniques capable of detecting unusually electrical and thermal anomalies in these compounds. Modern ceramic materials offer many attractive physical, electrical and mechanical properties for a wide and rapidly growing range of industrial applications; moreover specific use may be made of their electrical resistance, chemical resistance, and thermal barrier properties. In this review, we report the development and various techniques for the resistivity measurement of solid kind of samples.

scholarly journals Functionalized copolyimide membranes for the separation of gaseous and liquid mixtures

2010 ◽  
Vol 6 ◽  
pp. 789-800 ◽  
Author(s):  
Nadine Schmeling ◽  
Roman Konietzny ◽  
Daniel Sieffert ◽  
Patrick Rölling ◽  
Claudia Staudt
Keyword(s):  
Chemical Resistance ◽  
Temperature Stability ◽  
Liquid Mixtures ◽  
Industrial Applications ◽  
Gas Separations ◽  
High Temperature Stability ◽  
Good Separation ◽  
Separation Processes ◽  
Membrane Materials ◽  
Sulfur Containing

Functionalized copolyimides continue to attract much attention as membrane materials because they can fulfill the demands for industrial applications. Thus not only good separation characteristics but also high temperature stability and chemical resistance are required. Furthermore, it is very important that membrane materials are resistant to plasticization since it has been shown that this phenomenon leads to a significant increase in permeability with a dramatic loss in selectivity. Plasticization effects occur with most polymer membranes at high CO2 concentrations and pressures, respectively. Plasticization effects are also observed with higher hydrocarbons such as propylene, propane, aromatics or sulfur containing aromatics. Unfortunately, these components are present in mixtures of high commercial relevance and can be separated economically by single membrane units or hybrid processes where conventional separation units are combined with membrane-based processes. In this paper the advantages of carboxy group containing 6FDA (4,4′-hexafluoroisopropylidene diphthalic anhydride) -copolyimides are discussed based on the experimental results for non cross-linked, ionically and covalently cross-linked membrane materials with respect to the separation of olefins/paraffins, e.g. propylene/propane, aromatic/aliphatic separation e.g. benzene/cyclohexane as well as high pressure gas separations, e.g. CO2/CH4 mixtures. In addition, opportunities for implementing the membrane units in conventional separation processes are discussed.

Sign in / Sign up

Export Citation Format

Share Document