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55 Cards in this Set
- Front
- Back
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Name the process to strengthen rubber by adding _________ to transform it into a thermosetting elastomer
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vulcanization
sulfer |
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The major raw material for synthetic plastic is ________ and for synthetic rubber is _________
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petroleum or natural gas
natural solid fuel |
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To further improve rubbers strength and wear resistance, an additive called _____ is added to rubber to achieve that.
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carbon black
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Latex gloves have been used extensively for various purposes. What are latex gloves made from?
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Ethylbenzene-styrene, natural rubber
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Name of the plastic with recycling #1
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PETE
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Name of the plastic with recycling #2
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HDPE
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Name of the plastic with recycling #3
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V
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Name of the plastic with recycling #4
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LDPE
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Name of the plastic with recycling #5
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PP
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Name of the plastic with recycling #6
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PS
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Plastic used for making water/soda bottles
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PET
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What rubber is most commonly used by the seal industry for its excellent resistance to petroleum products
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Synthetic rubbers-nitrile rubber
Chloroprene/Neoprene Urethane rubber |
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Two most common methods for making plastic films
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blown film extrusion (TP)
Cast film extrusion Sheet extrusion |
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Auto tires are made of _________ rubbers
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styrene budadine Rubber (SBR)
Natural Rubber (NR) Polybutadine rubber (BR) |
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What rubber is impermeable and used as an inner liner in auto tires, basket balls
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Butyl Rubber (IIP)
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Which of the following polymers does not contain hydrogen
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PTFE
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Material for making green house panels as an alternate to glass
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Polycarbonate (PC)
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Typical material for making plastic floor tiles, water pipes, garden hoses and credit cards
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PVC
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The only inorganic polymer you have learned in this class
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Silicon
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As part of the son rays,_________ will damage polymers due to the high energy it carries is strong enough to break the bonds of polymer after long term exposure
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UV light and Heat
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Phenol formaldehyde which is a ______ polymer was used in your lab to make coasters using a method called _________
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Synthetic
Compression molding |
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Before mixing with a hardner, the epoxy resin that you used in your composite lab is a __________, and the plastic pellets you used in your injection molding lab is a _______
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thermoset
Thermoplastic |
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Carbon fibers are produced through a process called pyrolysis which is the process of
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carbonization
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The polymer whish is used to make plexiglass is
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PMMA
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Which of the following is a natural occuring ceramic material
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clay silicates
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The specific strength of a carbon fiber is ___times that of metals
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10
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Which elastomer is most suitable for metal applications
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silicone
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A recently developed strong fiber called Dynemma has been claimed as the worlds strongest fiber which has potential to replace all other fibers for composites. The polymer ised for making Dyneema fiber fibers is _______
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UHMWPE
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Polymers formed with only one type of monomer.
ex. PS Styrene, PE Ethylene, PP Polypropylene |
Homopolymers
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Polymers formed with two or more different types of monomers
ex. SBR Rubber, ABS Plastics |
Copolymers
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bonds easily broken by heat
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secondary bonds
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Only plastic that is not amorphous
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PET
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Natural Fibers
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Jute, hemp, wool, cotton, wood
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3 most commonly used synthetic fibers
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1. Polyamide (used for aramid, nomex)
2. Polyacrylonitrile (PAN) aka acrilic fibers 3. Polyester (PET) |
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Most important monomer
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Ethylene
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Characteristics of Engineering Plastics
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high strength and stiffness to weight ratios
High toughness and impact resistance |
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Increases hardness
Reduces oxidation |
vulcanization, invented by goodyear
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Most composites are combinations of two materials ______ material and _______ material
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reinforcing
matrix |
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Type of resin used for carbon (graphite) fibers
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epoxy
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Type of resin most used for glass fiber
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polyester
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Hand lay-up
spray up pre preg layup |
Open Molding
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Compression molding
Reinforced reaction injection molding Pultrusion Vacum Infusion molding |
Closed Molding
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What are ceramics
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crystaline in nature
Compounds formed between metallic and non metallic Common glass is amorphous ceramic material low impact strength (brittle) High porosity corrosion resistance high melting point |
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Clay is mainly a complex mixture of ________
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Silicates
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Common ceramic forming methods
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Slip Casting (water absorption mold with ceramic slurry)
Extrusion (paste or clay) Injection Molding Powder Pressing |
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What are the three rubbers utilized for tires?
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SBR, BR, and NR
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What are the Three most commonly used synthetic fibers?
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PA(Nylon), PAN, and PET
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Most commonly used fibers and resins?
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fibers: Glass fiber, Carbon Fiber, Kevlar Fiber(aramid)
Matrix: Epoxy, polyester, and vinyl ester |
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What is the definition of composite materials?
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Man-made materials that are a combination of at least two different materials. (created to contain properties that can not be held while on their own)
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The 3 most common manufacturing processes for thermoplastics?
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Extrusion molding
Blow molding Injection molding |
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The best oxygen barrier and best water barrier film
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Evoh for oxygen
PP,HDPE for water |
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Why is it important to use an autoclave while producing composites.
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Because the use of HIGHER TEMPERATURE and HIGHER PRESSURE allows to give the material for higher strength. and rid of air bubbles and excess resin
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Two most commonly used thermoplastics?
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HDPE AND PET
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What is the poly olefin family?
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LDPE 20%, HDPE14%, PP19%
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What are the five different plastic alloys
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SBR HIPS ABS NBR SAN
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