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Most plastics are thermoplastics. Most thermoplastics are commodity. PowerPoint Presentation
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Most plastics are thermoplastics. Most thermoplastics are commodity. - PowerPoint PPT Presentation


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Most plastics are thermoplastics. Most thermoplastics are commodity. JUST print out slides 1 – 30!!!. Engineering Thermoplastics. The most common!! Acrylonitrile Butadiene Styrene (ABS) Polycarbonate (PC) Polyamides (PA or Nylon). Polymer Materials. Engineering Resins ABS Nylon

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slide1

Most plastics are thermoplastics.

Most thermoplastics are commodity.

engineering thermoplastics

JUST print out slides 1 – 30!!!

Engineering Thermoplastics

The most common!!

Acrylonitrile Butadiene Styrene (ABS)

Polycarbonate (PC)

Polyamides (PA or Nylon)

polymer materials
Polymer Materials
  • Engineering Resins
    • ABS
    • Nylon
    • Polycarbonate
    • Acetal
    • Acrylic
    • Cellulosics
    • Ionomer
polymer materials1
Polymer Materials
  • Engineering Resins (cont)
    • PBT
    • PET
    • PPO
acrylonitrile butadiene styrene

Acrylonitrile Butadiene Styrene

ABS

EXCELLENT CHEMICAL RESISITANCE!!

acrylonitrile butadiene styrene abs
Acrylonitrile Butadiene Styrene (ABS)
  • This is an ethenic engineering plastic
    • i.e. basic monomer structure as ethylene – just modifying polystyrene by:
      • Adding plasticizer and copolymers of styrene butadiene and styrene acrylonitrile to produce a polystyrene terpolymer of acrylonitrile, butadiene and styrene (ABS).
slide7

ABS

butadiene

slide8
ABS
  • Major Uses
    • Appliance Housings
    • Canoes
    • Typewriter Keys
    • Pipes & Pipe Fittings
    • Telephone Housings
slide9
ABS
  • Why would you want to use it?
    • Low to Medium Cost
    • Good Impact Strength
    • Good Chemical Resistance
    • High Gloss Surface Finish
    • Good Flexural Properties
slide10
ABS
  • Processes
    • Injection Molding
    • Extrusion
    • Blow Molding
    • Thermoforming
slide11
ABS
  • Long Term Service Temperature
    • Max = 135°
    • Min = Already below Tg
nylon

Nylon

PA - Polyamide

http://www.sdplastics.com/nylon.html

http://www.ides.com/generics/Nylon/Nylon_typical_properties.htm

HIGHEST STRENGTH THERMALPLASTIC!!

basic info
Basic Info
  • Polyamides (nylon) are polymers formed as a condensation product of an acid and amine. They all contain the characteristic amide group: CO-NH.

** suffixes refer to the number of carbon atoms in each reacting substances involved in condensation process. They are used as an identification factor. Nylons with a period between the numbers are homopolymers; nylons with a slash (/) between numbers are a cop0lymner (ex. Nylon 6/12 is a copolymer of nylons 6 and 12)

  • Types
    • Most Common
      • Nylon 6
      • Nylon 6/6
    • Nylon 6/10
    • Nylon 6/12
    • Nylon 11
    • Nylon 12
slide15

Nylon

Nylon 6/6

  • Crystalline – Yes, very flexible
  • Hygroscopic – Yes (O and N)
  • Glass Transition = (135 F)
  • Flammability – Varies depending on additives, but will usually self extinguish because of N
nylon1
Nylon
  • Major Uses
    • Structural parts!! (i.e. replacement for cast aluminum 380 series)
    • Electrical Connectors
    • Gears
    • Bearings
    • Cables, Ties, Rope
    • Fishing Line
    • Automotive Valve Covers/Oil Pans
    • Sports/Exercise Equipment
    • Tools
nylon2
Nylon
  • Why would you want to use it?
    • High Strength – among the highest of all engineering plastics
    • Good candidate for structural parts
    • Good Heat Resistance (continuous use up to 260 F, bonded to rubber in molds up to 350 F)
    • Good Chemical Resistance
    • Excellent Wear Resistance
    • Good Fatigue Resistance
nylon3
Nylon
  • Processes
    • Injection Molding
    • Extrusion
    • Blow Molding
    • Rotational Molding
    • Thermoforming
more on nylon
More on Nylon
  • One of the first “engineering” plastics (30s).
  • Crystalline thermoplastic
  • Can have tensile properties comparable to soft aluminum.
  • Types 6 and 6/6 are the cheapest and most common (also worst for moisture absorption)!! These two grades = 90% of production in US. Also, highest strength grades.
  • Biggest disadvantage – tendency to absorb moisture after prolonged period (up to 10% by weight) which causes war page.
  • Nylon 12 – best moisture resistant grade
slide22

Su = 35 ksi!!

**Discuss bearing plate project for RuR, show samples

polycarbonates pc
Polycarbonates (PC)

IMPACT STRENGTH!!

slide24
Polycarbonate
  • Crystalline – No, too rigid
  • Hygroscopic – Yes (O)
  • Glass Transition – High (300 F)
  • Flammability – No (High number of double carbon bonds will extinguish –soot)
polycarbonates pc1
Polycarbonates (PC)
  • Polycarbonates are amorphous linear polyesters with excellent moldability.
  • Good impact strength, temperature resistance.
  • Transparent (aka Plexiglas)
  • Tensile strength similar to ABS and nylon except impact strength can be 10X greater! But……Costs more and susceptible to environmental stress cracking.
polycarbonates pc2
Polycarbonates (PC)
  • Uses include:
    • Helmets (football and hard hats), face shield,power tool housings, cell phones, automotive dashboards, window cranks, small gears, etc.
slide28
Polyoxymethylene(Acetal or POM)
  • Crystalline – Yes, very flexible
  • Hygroscopic – Yes (O)
  • Glass Transition – Low (-100 F)
  • Flammability – Yes (only C and O bonds)
acetal1
Acetal
  • Major Uses
    • Gears
    • Bearings
    • Faucet Components
    • Fuel Pump Components
    • Refrigerator Clips
    • Zippers
acetal2
Acetal
  • Why would you want to use it?
    • Low to Medium Cost
    • Good Chemical Resistance
    • High Strength
    • Excellent Fatigue
    • Good Creep Resistance
    • Lubricity
    • Dimensional Stability at High Temperature
acetal3
Acetal
  • Processes
    • Injection Molding
    • Extrusion
    • Blow Molding
    • Rotomolding
acetal4
Acetal
  • Long Term Service Temperature
    • Max = 200°
    • Min = ~ -100
acetal6
Acetal
  • Material Suppliers
    • DuPont
    • Hoechst Celanese
    • BASF
    • LNP
slide36
Polymethylmethacrylate (Acrylic)
  • Crystalline – No, too rigid (dual methyl groups)
  • Hygroscopic – Yes (O)
  • Glass Transition – High (220 F)
  • Flammability – Yes (only C-H and C=O bonds)
acrylic1
Acrylic
  • Major Uses
    • Sheet
      • Windows
      • Displays
    • Signs
    • Surgical Instruments
acrylic2
Acrylic
  • Why would you want to use it?
    • Low Cost
    • Good Chemical Resistance
    • Hardness
    • Good Creep Resistance
    • Transparency
    • Best Polymer for Weatherability
acrylic3
Acrylic
  • Processes
    • Casting
    • Injection Molding
    • Extrusion
    • Thermoforming
acrylic4
Acrylic
  • Long Term Service Temperature
    • Max = 80°
    • Min = Already below Tg
acrylic6
Acrylic
  • Material Suppliers
    • AtoHaas
    • Continental
    • DuPont
    • ICI
cellulosic1
Cellulosic
  • Major Uses
    • Tool Handles
    • Safety Glasses
    • Tooth Brush Handles
    • Automotive and Furniture Trim
    • Toys
    • Tubing
    • Writing Instruments
cellulosic2
Cellulosic
  • Why would you want to use it?
    • Low Cost
    • Medium Chemical Resistance
    • Hardness
    • Transparency
    • Rigid
cellulosic3
Cellulosic
  • Processes
    • Casting
    • Injection Molding
    • Extrusion
cellulosic4
Cellulosic
  • Long Term Service Temperature
    • Max = 220°
    • Min = Already below Tg
cellulosic6
Cellulosic
  • Material Suppliers
    • Albis
    • Eastman
    • Kleer
    • Rotuba
ionomer1
Ionomer
  • Major Uses
    • Golf Ball Covers
    • Automotive Bumper Pads
    • Film for Food and Drugs
ionomer2
Ionomer
  • Why would you want to use it?
    • Good Resilience
    • Good Flexibility
    • Abrasion Resistance
    • Good Chemical Resistance
ionomer3
Ionomer
  • Processes
    • Injection Molding
    • Extrusion
ionomer4
Ionomer
  • Long Term Service Temperature
    • Max = 100°
    • Min = -40
ionomer6
Ionomer
  • Material Suppliers
    • Amoco
    • BASF
polymer materials2
Polymer Materials
  • Thermoset
    • EPOXY
    • Melamine
    • Urea
    • Phenolic
    • Polyester
    • Vinyl Ester
epoxy1
EPOXY
  • Major Uses
    • Encapsulating Electronic Components
    • Bobbins for Coil Windings
    • Adhesives
epoxy2
Epoxy
  • Why would you want to use it?
    • High Mechanical Strength
    • Outstanding Adhesive Properties
    • Good Resistance to Heat
    • Good Chemical Resistance
epoxy3
Epoxy
  • Processes
    • Compression/Transfer Molding
    • Injection Molding
epoxy5
Epoxy
  • Material Suppliers
    • Ciba-Geigy
    • Dow
    • Shell
melamine
Melamine
  • Major Uses
    • Molded Dinnerware
    • Electric Shaver Housings
    • Buttons
    • Ashtrays
    • Connector Bodies
melamine1
Melamine
  • Why would you want to use it?
    • High Surface Hardness
    • Good Heat Resistance
    • Good Flame Resistance
    • Resists Chipping and Breaking
melamine2
Melamine
  • Processes
    • Compression/Transfer Molding
    • Injection Molding
melamine3
Melamine
  • Material Suppliers
    • American Cynamid
    • BIP
    • Bud Co.
slide72
Urea
  • Major Uses
    • Control Housings
    • Wiring Devices
    • Control Buttons
    • Knobs
slide73
Urea
  • Why would you want to use it?
    • High Surface Hardness
    • Good Heat Resistance
    • Good Flame Resistance
    • Resists Chipping and Breaking
slide74
Urea
  • Processes
    • Compression/Transfer Molding
    • Injection Molding
slide76
Urea
  • Material Suppliers
    • American Cynamid
    • BIP
    • Bud Co.
phenolic1
Phenolic
  • Major Uses
    • Electrical Products
    • Connectors
    • Cooking ware (recall plate)
    • Ashtrays
    • Utensil Handles
    • Elecrtic Motor Components
    • Knobs
phenolic2
Phenolic
  • Why would you want to use it?
    • Good Heat Resistance
    • Good Flame Resistance
    • Good Rigidity
    • Good Creep Resistance
phenolic3
Phenolic
  • Processes
    • Compression/Transfer Molding
    • Injection Molding
phenolic4
Phenolic
  • Material Suppliers
    • Amoco Electronic
    • Rogers
    • Plenco
vinylester1
Vinylester
  • Major Uses
    • Pipe
    • Electrical Equipment
    • Grating
    • Exhaust Stacks
    • Washer Drums
    • Chemical Tanks
vinylester2
Vinylester
  • Why would you want to use it?
    • Good Heat Resistance
    • Excellent Bonding to Fibers
    • Good Chemical Resistance
    • Good Rigidity
    • Good Creep Resistance
vinylester3
Vinylester
  • Processes
    • Hand Lay-Up
    • Compression/Transfer Molding
    • Injection Molding
vinylester4
Vinylester
  • Material Suppliers
    • Premix
    • Glastic
    • Reichold