Did you know the real reason bubblegum’s original color was pink is because when Walter E. Diemer was looking for a color to put in the gum, the only color around the factory was pink? (Ament, 2007) Also, what is bubblegum and why can you blow bubbles with it? The properties of the gum cause and make it possible for the gum to stretch and form a bubble. What is Gum When we chew gum, we are basically chewing rubber. Gum started out as latex sap from a tree (the sapodilla). The tree grew in Central
metals [4]. They do however have desirable properties such as the ability to be easily formed into complex shapes. The properties of a composite are a function of the pr... ... middle of paper ... ...t not deform at all under load and as such an elastomer matrix might not be suitable for this application. Man-made polymers are generally called ‘resins’ and can be classified under two types; thermoplastic and thermoset, according to the effect of heat on their properties. Thermoplastic materials contain
OVPOSS is shown in Figure 1. As can be seen, the POE Chains are activated by the DCP in the first stage and then they react with the OVPOSS vinyl groups to form an integrated network. In fact, it is generally understood that the peroxide abstracts the hydrogen atoms of POE chain and this new radical reacts with the vinyl groups in OVPOSS. The crosslinking process is very fast and effective because each OVPOSS molecule has eight reactive vinyl groups. In addition, increment in amount of DCP or OVPOSS
as a modifier, namely Plastomer and Elastomer. Plastomers polymers like ethylene vinyl acetate (EVA) have high rate of strength gain but shows brittle behaviour at low temperature. Elastomers like SBR and NR shows a very elastic behaviour, stretches to around ten times and quickly return to original shape upon release of stress. The process of modifying asphalt differs in both plastomers and elastomers. Plastomers forms a tough and rigid network while elastomers forms an elastic framework. They are
4-polyisoprene. Styrene-butadiene rubber (SBR) is the most common synthetic rubber. It is a random copolymer of styrene and butadiene and has good physical properties once it has been strengthened through vulcanization. Introduction Rubber is an elastomer that can be obtained naturally from certain trees or synthesized from petroleum and natural gas. [1] It is a valuable resource that is commonly used in tires, machine belting, wire insulation, and shoe soles. Rubber is created naturally, most commonly
Firefighter is considered as one of the most dangerous jobs in America which accounts for 829 fatalities and more than 65880 injuries over the past decade. Every year, fire accidents provoke detrimental cost to all around the world. In some countries such as India and Russia, average number of fire deaths per year is around 10000 – 20000. This high figures demonstrate the urgency of an advancement in fire handling services. With many limitations that humans possess including the breathing issues
Plastic Materials for Medical devices July 2015 Table of Contents Abstract 1 1. Medical Plastics Market overview 1 2. Polymer materials 2 3. Healthcare Domain requirements 3 3.1 Sterilization compatibility 4 3.2 Biocompatibility 5 3.3 Benefits of Medical Polymer knowledge 6 4. Summary 6 5. How will your use case bring value to IGATE business/vertical 6 6. References 6 7. About the Authors 6 Abstract Polymers popularly coined as “plastics” have proved their importance in different
1. Introduction Polymeric materials play a functional role in every aspect of daily life, from clothing to infrastructure. Polymers differ greatly from other materials, such as ceramics or metals, based upon the types of bonding. Metals bond metallically, creating a sea of electrons, and ceramics generally bond ionically, strongly tying electrons to lattice points. Polymers bond covalently in carbon chains, which (in general) make their properties more variable due to the possibilities of arrangement
Steps of Manufacturing The Steering Wheel Introduction Steering wheels nowadays are made up of resin covered metallic internal core and an external shell that is made up of different material depending on the manufacturer (George, 2011). In this formula model car steering wheel, the core will be made up of carbon fibre that will be impregnated with polypropylene. The rack housing will be made of 6063-T6 high strength aluminium with the grips being ABS. Steps Followed in Manufacturing of Steering
Have you ever wondered why the plastic bag that you left on the porch during winter cracks or breaks more easily than when you left it during summer time but a piece of wood which was left just like the plastic bag has no effect whatsoever? This is because of a phenomenon, which only happens to polymers, known as the glass transition. For each polymer, there is a certain temperature at which the amorphous polymers undergo a second order phase transition from a rubbery and viscous amorphous solid
1) REPLICA MOLDING: Replica molding is a process that transfers a pattern from a rigid or elastomeric mold into another material by using a liquid which gets solidified when it comes in contact with the mold. Replica molding can be broken down into three subfields namely microtransfer molding, micromolding in capillaries and UV-molding. As shown in the figure below, the rigid master is prepared by lithography, molding or by some other techniques and then the prepolymer is poured onto the master and
INTRODUCTION What is polymer? The term name of polymer came from ancient greek, poly and mers meaning many parts. Polymer consist a very large molecule comprising hundreds or thousands of atoms formed by successive linking of one or two, occasionally more, types of small molecule in chain or network structures. In Fig 1, this specific molecular structure (chainlike structure) of polymeric materials is responsible for their intriguing mechanical properties. Polymer architecture can vary.
contrast to other elastomer like polymers. Such as, good processability, resistance to oils as well as hydrocarbons, especially resistance to hydrocarbons and oils, NBR has wide region of service temperature (from -35 oC up to 100 oC) [1-2]. High density polyethylene (HDPE) is a semi-crystalline with outstanding chemical resistance as well as simple processability.Nitrile butadiene rubber (NBR) is a simply processable, tough, and flexible rubber. The knowledge of thermoplastic elastomers (TP)from blends
Hello. Today I will be talking to you all about silicone textured breast implants. Before I start, I want to mention that there have been about 1,500 known cases of BIA-ALCL, mostly in textured breast implants, around the world. There have been over 35 million people who have had breast augmentation surgeries and therefore there is a small risk of experiencing this type of lymphoma. Although that said, this illness is quite severe and if you or individuals you know are interested in getting breast
Synthetic polymers are used by chemist to make many everyday items that we are frequently using without even realising. A common product that the use of synthetic polymers have been introduced to is various types of cosmetics and personal care items. Synthetic polymers are currently being used in cosmetics and questioned whether they are either inevitable or ineffective in their use. Synthetic polymers are already being used in cosmetics this meaning the effects of synthetic polymers must either
Ladies of any age can be malcontented if their bosoms are unequal to their body. Bosom size and shape is an essential part of lady's identity. Any uneasiness identified with bosoms may prompt to low fearlessness. There are numerous choices to reshape or improve the bosom of a lady. Plastic surgery bosom expansion is one of the beat approaches to upgrade your bosoms. Surgical bosom increase is a standout amongst the most as often as possible picked plastic surgery by the ladies of the United States
Amandi Hiyare: Before forming my research question, I had a discussion with my research project coordinator “Lisa Pope” who told me that the Flinders nanotechnology research team has been developing microbial catheters. Then on Monday I had an interview with Professor Joe Shapter who told me that your team was leading this project. So I was wondering whether you would be able to provide me with some detailed information about this innovation? Prof. Amanda Ellis: The problem with catheters is the
SILICONE - A TRENDING BIOMATERIAL R.PERUMAL SAMI,rperumalsamirdftijk@gmail.com,C.LALITHA LAKSHMI,lalithamufc@gmail.com, T.LAKSHMI,nandhini2013@gmail.com . ABSTRACT: Silicone polymers are of relatively recent invention and commercial production was started in the 1940's. Shortly thereafter it was found that glass surfaces treated with silicone fluid delayed the clotting of blood. By the mid-1950s medical applications of silicones had greatly increased and many studies of the biological
then allowed to cool and removed form the mold by an ejector system. Different raw plastics materials can be used in the injection molding process. Most commonly injection molding machines provide processing for phenolics, melamine, silicone, elastomers and polyester. These materials can be numerous colors and can be used for making the various products depending on what characteristics like elasticity. flexibility and hardness are needed. The injection molding machine has two main components
In the modern world, the role of engineers and engineering as a profession has an enormous impact on our everyday lives. Almost everything we touch was designed by engineers; from the cars we drive to the houses we live in. It is essential, then, that a system is in place to ensure engineering decisions are handled with moral integrity and safety in mind. This is known as ethics. On some level, all engineering decisions are governed by an overarching code of ethics in the form of a code of conduct