Polymers and plastics

1. 1We use the word plastic to [blank_start]describe[blank_end] a series of materials with similar [blank_start]structure[blank_end] that are [blank_start]mouldable[blank_end] under the correct conditions of [blank_start]pressure[blank_end] and [blank_start]temperature[blank_end], and wich mantein their [blank_start]shape[blank_end] when these conditions are lifted.
   TYPES OF POLYMERS
   [blank_start]Thermoset[blank_end]: plastic formed by cross-linked polymers chain
   Thermoplastic: plastic formed by [blank_start]linear[blank_end] polymers chain
   Elastomers: plastic formed by [blank_start]coiled[blank_end] polymers chains

   1. Astructure
   2. Bdescribe
   3. Cmouldable
   4. Dpressure
   5. Etemperature
   6. Fshape
   7. GThermoset
   8. Hlinear
   9. Icoiled
2. 2THERMOSET
   Can be shaped using [blank_start]heat[blank_end]
   [blank_start]Melamine[blank_end]: resistance to high temperature ([blank_start]utensils[blank_end], kitchen cupboard)
   Bakelite: hard [blank_start]blackplastic[blank_end] that withstand [blank_start]heat[blank_end] very well ( handle, [blank_start]plugs[blank_end])
   Polyester [blank_start]resin[blank_end]: [blank_start]rigid[blank_end] and brittle, usually strengthened with fibreglass (cars bodle, [blank_start]pools[blank_end])

   1. Aheat
   2. BMelamine
   3. Cutensils
   4. Dblackplastic
   5. Eheat
   6. Fplugs
   7. Gresin
   8. Hpools
   9. Irigid
3. 3ELASTOMERS
   very [blank_start]flexible[blank_end] material and they degrade easly with [blank_start]heat[blank_end].
   Rubber: naturally ([blank_start]latex[blank_end]) or synthetic, a lot of [blank_start]elasticity[blank_end].
   [blank_start]Neoprene[blank_end]: flexible, insulated and waterproof
   Silicone: flexible, soft and [blank_start]durable[blank_end]

   1. Aflexible
   2. Bheat
   3. Clatex
   4. Delasticity
   5. ENeoprene
   6. Fdurable
4. 4THERMOPLASTICS
   Plastics that are softened by heating and can be [blank_start]melted[blank_end] as times as you [blank_start]want[blank_end].
   PET: recyclable, high [blank_start]transparent[blank_end] ( [blank_start]bottle[blank_end])
   [blank_start]HDPE[blank_end]: opaque, [blank_start]inflexible[blank_end] (milk bottle, bags, container)
   PVC: resistance to abrasion and [blank_start]impact[blank_end] ( [blank_start]pipes[blank_end], cable insulator)
   LDPE: soft, flexible and strached ( [blank_start]bags[blank_end] and packaning film)
   [blank_start]PP[blank_end]: model and dye, resistance to solvent (toys, [blank_start]folder[blank_end], packaning)
   [blank_start]PS[blank_end]: very lighweight, bbrake easly ( stationery, [blank_start]toys[blank_end])
   

   1. Amelted
   2. Bwant
   3. Ctransparent
   4. Dbottle
   5. EHDPE
   6. Finflexible
   7. Gimpact
   8. Hpipes
   9. Ibags
   10. JPP
   11. Kfolder
   12. LPS
   13. Mtoys
5. 5MATERIAL OF 3D PRINTING
   [blank_start]PLA[blank_end]: came from [blank_start]sugar cane[blank_end], beet, [blank_start]non-toxic[blank_end], is biodegradable, its melted at [blank_start]200C[blank_end] and has low [blank_start]resistance[blank_end].
   ABS: Its no [blank_start]biodegradable[blank_end], came from [blank_start]petroleum[blank_end], [blank_start]toxic[blank_end], its melted at [blank_start]250C[blank_end], wramping and have [blank_start]hight[blank_end] resistance.
   [blank_start]PETG[blank_end]: Its the best of bouth
   3D PRINTING PROCESS
   Design- [blank_start]slicing[blank_end]- printing

   1. APLA
   2. Bsugar cane
   3. Cnon-toxic
   4. D200C
   5. Eresistance
   6. Fbiodegradable
   7. Gpetroleum
   8. Htoxic
   9. I250C
   10. Jhight
   11. KPETG
   12. Lslicing
6. 6MODELING PLASTICS
   [blank_start]Extursion[blank_end]: [blank_start]thermoplastic[blank_end], to obtain long products. Heat the object and then [blank_start]cooled[blank_end] it
   Injection moulding: [blank_start]melt[blank_end] plasticc into a [blank_start]cold[blank_end] mould
   Compression moulding: [blank_start]thermoset[blank_end]. Melt and [blank_start]press[blank_end]
   [blank_start]Blow[blank_end] moulding: Blow until it take the form eith a mould
   Vacuum forming: thermoplastic, ( [blank_start]hacer algo al vacio[blank_end])

   1. AExtursion
   2. Bthermoplastic
   3. Ccooled
   4. Dmelt
   5. Ecold
   6. Fthermoset
   7. Gpress
   8. HBlow
   9. Ihacer algo al vacio

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3º de ESO Tecnologia Test sobre Polymers and plastics, creado por patricia gomez el 03/05/2022.

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