Polymers Flashcards
What is the thermoplastic?
A material which can be repeatedly re-shaped and reheated allowing it to be recycled off its initial use. The plastics have long linear chain molecules held by forces.
What is a thermosetting polymer?
Material which undergoes a chemical change where molecules form cross links. Thermostat polymers cannot be reheated and reshaped even at very high temperatures.
What is an elastomer?
A material which was room temperature can be deformed under pressure and then upon release of pressure will return its original shape. Last of us have weak bonds which allow them to stretch easily.
What are different types of polymer base sheet and film?
Foam board, fluted PP sheet, translucent PP sheet, Styrofoam, low density polyethylene sheet, plastic foam
What are properties of foam board?
Two layers of card with a foam middle core
What are uses of foam board?
Mood board backing as well as presentation boards and modelling
What are flutter pp sheets ?
Extracted sheets with integral flutes or corrugations which are relatively lightweight and easily bent along the flutes
What are the uses of fluted PP sheets?
Signs such as construction site signs as well as storage boxes
What are the properties of translucent polypropylene sheet?
Tough poly machine can be folded millions of time virtually impossible to tear and water resistant
Uses of translucent PP sheets
Packaging products folders as well as boxes
What are the properties and performance characteristics of Styrofoam?
They are dens can be cut and sanded with standard workshop tools
What are the uses of Styrofoam?
Product model link and formers for mouldings and laminating
What are the properties of low density polyethylene?
They are tough and available and then sheet form they can be transparent and have a good chemical resistant and flexible
What are the uses of low density polyethylene?
Food wrapping, air pillow packaging, bubble wrap as well as carrier bags
What are the uses of plastozate foam ?
They are tough flexible have a good impact of resistant and impermeable to liquids
What are the uses of plastozate foam ?
Protective packaging swimming floats, gym and exercise mats
What are the properties of cellular acetate?
They are transparent and tough and naturally by degrade
What are the uses of cellular acetate?
Packaging film and membranes and photographic film
What are the uses of polylactide?
They are transparent, tough and naturally by degradable
What are the uses of polylactide?
By the gradable packaging film
What are the properties of Ldpe ?
Tough , chemical resistant , weatherproof and available in translucent
- safe working them is 65
Thermoforming plastic
What are the properties of high density polyethylene ?
Available in translucent and is weatherproof, tough and has a good chemical resistance
Themo forming plastic
What are the properties ofpolypropylene ?
Available in translucent, good chemical resistance, tough , good fatigue resistance
Safe working temperature-100 degrees
Thermoforming plastic
What are the properties of Hips ?
Hard , rigid , available in translucent, tough
Safe working temp is 70 degrees
Thermoforming plastic
What are the properties of Abs ?
Tough , hard , available in opaque
Safe working temperature is 80 degrees
Thermoforming plastic
What are the properties of pmma ?
Tough, hard, good chemical resistance, available in translucent.
Safe temperature is 95
Thermoforming plastic
What are the properties of nylon ?
Tough , corrosion resistant, good temperate resistance , low coefficient of friction
Safe working temperature is 150
Thermoforming plastic
What are the properties of rigid polyvinyl chloride ?
Rigid, tough, hard, good chemical resistance, good weathering
Safe working temperature- 95 degrees
Thermoforming plastic
What are the properties of urea formaldehyde?
Hard , heat resistant , good electrical insulator, brittle
Thermo setting plastic
Properties of Melamine formaldehyde ?
Hard , heat resistant, good chemical resistance , food safe
Thermosetting plastic
What are the properties of polyester resin ?
Rigid , heat resistant, chemical resistant and brittle
What are the properties of epoxy resin ?
Rigid , clear , hard , tough and chemical resistant
Thermosetting polymers
What are the properties of natural rubber ?
High tensile strength, low elongation, good hardness , good cold resistance
What are the properties of butadiene rubber ?
Tough, excellent wear resistance against friction , good thermal resistance
What are the properties of neoprene ?
Good thermal resistance, toughness , good oil and chemical resistance, excellent weather resistance and electrical insulator
What are the properties of silicone ?
Good flexibility at low temperatures , poor abrasion resistance, good thermal resistance to temperature esteemed , good lubricating qualities
What are the two types of bio polymers ?
Natural and synthetic
What are the negatives of using bio polymers ?
- Produce methane gas when they decompose in landfill contributing to global warming
- the require high temperatures to degrade and may leave toxic residues
- natural bio polymers need land to grow the crops
- they cannot be recycled and may contribute to theme throw away culture
What type of polymer is corn starch polymer and what is its source ?
Natural Bio polymer , made from starch vegetables such as corn and potatoes
What type of polymer is potatopak and what is its source ?
It is a natural biopolymer made from potato starch
What type of polymer is biopol polymer and what is its source ?
Natural biopolymer made from bacteria grown in cultures. Additives to promote refraction
What type of polymer is poly lactic acid polymer and what is its source ?
It is a synthetic bio polymer made from corn kernels or sugar cane , fermented to produce lactic acid which is synthesised
What type of polymer is lactide polymer and what is its source ?
A synthetic bio polymer that is fullly compostable and water soluble.
What type of polymer is glycolide polymer and what is its source ?
A synthetic bio polymer that is fully compostable
What are the different types of refraction
Photodegradable- light
Oxydegradable - oxygen
Hydro degradable- water
Why does refraction occur ?
The action of micro organisms which convert the material into water , carbon dioxide, biomass and possibly methane
