This document discusses polymers classified by their applications, focusing on elastomers. It defines elastomers as polymers with both elasticity and viscosity, and provides examples such as natural rubber, synthetic rubbers like polybutadiene and butyl rubber, and silicone rubber. The document explains the processes of obtaining natural rubber from trees and vulcanization. It discusses key elastomer properties like glass transition temperature and applications in industries and products like tires, hoses and coatings.
Additives of Polymer, Additives of plastic, Improve properties of Plastic, Ty...Jaynish Amipara
additives of plastic.
uses of filler in plastic.
types of a heat stabilizer.
types of lubricant.
types of plasticizer in plastic.
plastic in antioxidant.
Additives of Polymer, Additives of plastic, Improve properties of Plastic, Ty...Jaynish Amipara
additives of plastic.
uses of filler in plastic.
types of a heat stabilizer.
types of lubricant.
types of plasticizer in plastic.
plastic in antioxidant.
Pultrusion is a continuous process for manufacture of composite materials with constant cross-section.
It is more widely used in industries where there is a continuous demand of the product
Pultrusion is a continuous process for manufacture of composite materials with constant cross-section.
It is more widely used in industries where there is a continuous demand of the product
The presentation is based upon the quality testing and procedures of natural rubber and synthetic rubber. This presentation also contains part of Mouding process in rubbers.
elastomeric fibers: properties and applicationsSeble Petros
elastomeric fibers are fibers which have a property of extreme extencibility and elastic recovery. this seminar describes major properties and applications of elastomeric fibers.
The presentation describes about the butyl rubber about its properties, compounding, categories, applications, new innovations, advantages and disadvantages. The references are added at the end
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
4. Elastomers : -
An Elastomer is a polymer with viscoelasticity (i.e.,
both viscosity and elasticity) and very weak intermolecular
forces, and generally low Young's modulus and high failure
strain compared with other materials
Now we have some key point to identify
elastomers
4
5. 1. IUPAC defines the term "elastomer" by
"Polymer that displays rubber-like elasticity.
2. Elastomers are amorphous polymers
3. Elastomers are usually thermosets but may also
be thermoplastic
4. the elastomer will return to its original configuration
when the stress is removed
5
6. Now we see in this example clearly : -
(A) is an unstressed polymer.
(B) is the same polymer under
stress.
When the stress is removed, it will
return to the A configuration. (The
dots represent cross-links)
6
7. There are some Example of Elastomers In our daily
life : -
1. Natural polyisoprene(cis or Trans)
Fig :- Gutta Percha Fig :- Cameroon tree Fig :- Rubber latex
7
8. 2. Synthetic rubber i.e., Polybutadiene rubber
* It is a polymer formed from the polymerization of the monomer 1,3-
butadiene.
* Polybutadiene has a high resistance to wear and is used especially in
the manufacture of tires and
* which consumes about 70% of the production
8
9. 3. Butyl rubber, sometimes just called "butyl", is a synthetic
rubber
* A copolymer of isobutylene with isoprene.
* The abbreviation IIR stands for isobutylene isoprene
rubber.
* Polyisobutylene, also known as "PIB" or polyisobutene
Fig : - Hand gloves made from Polyisobutylene
9
10. 3. Ethylene-vinyl acetate (EVA)
also known as poly (ethylene-vinyl acetate) (PEVA)
*It is the copolymer of ethylene and vinyl acetate.
* The weight percent vinyl acetate usually varies from 10 to 40%,
with the remainder being ethylene.
Fig : - EVA foam sheetsFig : - ShoesFig : - Pool noodles
10
11. 4. Silicone rubber is an elastomer (rubber-like
material)
* composed of silicone—itself a polymer—
containing silicon together with carbon, hydrogen,
and oxygen.
* Silicone rubbers are widely used in industry,
* resistant to extreme environments and temperatures
from -67 °F to 572 °F (-55 °C to 300 °C)
Fig : - Liquid Silicone Rubber
Fig : - A silicone
rubber pastry
brush.
11
12. How elastomers made from Natural And Synthetic
resources
1. Rubber tapping : -
In This Process The milky white liquid latex is collected from the
rubber trees in a cup by making a slight V-cut on the tree bark.
Fig : - Figure shoes Process Of Tapping
12
13. 2. Mastication – The rubber obtained from the tapping
process is still not ready to be used. When it is cold it is very
brittle in nature and when warmed up it becomes very
gluey. To remove the brittle nature and strong odor of the
rubber
Fig : -
In this Figure A Man drawn the Rubber
Into Mastication Machine Which Obtained
From Tapping Process
13
14. 3. Vulcanization : –
“Vulcanization is a Process Of Heating of Rubber
With Sulphur At very High Temperature “
The process was discovered in 1839 by the U.S.
inventor Charles Goodyear
Even after performing all these steps rubber is not
much stronger and harder to be used in various items
like car tires and machinery. To enhance all these
properties, sulphur is added to
14
15. the rubber and it is heated at a temperature ranging 373
k to 415 k. This process is known as
vulcanization. Sulphur acts as a cross-linking agent and
after vulcanization, rubber gets cross-linked and becomes
hard.
15
16. Properties of Elastomers :-
1.Glass Transition Temperature : -
The glass–liquid transition, or glass transition, is the
gradual and reversible transition
in amorphous materials (or in amorphous regions
within semi crystalline materials), from a hard and
relatively brittle "glassy" state into a viscous or
rubbery state as the temperature is increased
* The glass-transition temperature Tg of a material
characterizes the range of temperatures over which this
glass transition occurs.
16
17. * It is always lower than the melting temperature, Tm, of the
crystalline state of the material
Fig : - This Graph Shows Measurement of Tg (the
temperature at the point A) by differential scanning
calorimetry
An Example Of Glass transition in our Daily Life
Fig : - In this We clearly See The transition In ironing, a fabric is heated through the glass-
rubber transition.
17
18. There are Various Polymers With Glass Transition
Temperature (Tg) : -
Material Tg (°C) Tg (°F)
Commercial
name
Tire rubber −70 −94
Polyvinylidene
fluoride (PVDF)
−35 −31
Polyvinyl fluoride (PVF) −20 −4
Polysulfone 185 365
Polystyrene (PS) 95 203
Polypropylene (PP isotactic) 0 32
Polypropylene (PP atactic) −20 −4
Polynorbornene 215 419
Polylactic acid (PLA) 60–65 140–149
18
Continue
20. 2. It May Possibly Used in Temperature Range Approximately -40
to 100 Degree Centigrade. It Exhibits Elongation Up to 450 to 500 %
.
3. It possesses Good Physical properties , Excellent abrasion
resistance but sensitive to
oil , waste water and ozone ; show good but not outstanding
Electrical properties.
4. SBR is superior to natural rubber because of its easy processing
and good quality end
Products
5. Because of its irregular structure , SBR does not crystallize.
20
22. Application of rubber in our daily life
1. Industrial Rubber
Since World War II, rubber has found its way into an
innumerable amount of industries, for an even greater
amount of applications
Feet, Pads, Bumpers Heavy Duty Rubber Rubber Shock AbsorbersFoam Sponge Rubber
22
23. 2. Smart Products
Rubber-Cal stocks an entire inventory of specialty rubber items.
These range from flexible ducting hoses to rubber parts for
snowplows, street sweepers, and woodworking sanders
Flexible Ducting Street Sweeper Parts Rubber Snowplow Cutting Edges
23
25. 4. Percentage of elastomers used in Industrial
Coatings Resins
Polyurethanes are versatile
polymers with a broad range of
applications across many industries
Polyurethane coatings are applied
to products to improve their
appearance and provide protection
from environmental conditions,
such as sunlight UV, abrasion, rain
Fig : - Graph Show % of elastomer
used in industrial coating resins
25