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

Beschreibung

3º de ESO Tecnologia Quiz am Polymers and plastics, erstellt von patricia gomez am 03/05/2022.

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patricia gomez

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Español

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tecnologia3º de eso

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