Polymers
Bayani Gaba-gaba
Polymers are the second great family of graphic materials. Where paper and card give a printable, foldable surface, polymers give transparency, waterproofing, flexibility and durability that fibre cannot. A clear drinks bottle, a laminating pouch, a self-adhesive vinyl shop sign, a polypropylene presentation folder and a 3D-printed model are all graphic products made from polymers. For the designer, the skill is knowing which named polymer gives the right balance of clarity, toughness, cost and recyclability.
This note covers the graphic-products polymer objectives: how polymers are classified into thermoplastics, thermosets and biopolymers; the stock forms (sheet, film, board, granule, resin) that the graphic designer actually buys; the properties that decide a choice; the named polymers from PET to PLA and from PVC to epoxy resin and what each is used for; and the environmental questions that now shape every polymer decision. The named materials are the heart of the syllabus, so each one is given a clear identity, property and use.
Manufura
- demonstrate knowledge of polymers, including biopolymers, and understand their classification, stock forms, properties, environmental impact and uses
- demonstrate knowledge of thermo polymers, for example: - nylon - low- and high-density polyethylene (LDPE and HDPE) - polyethylene terephthalate (PET) - polyvinyl chloride (PVC) (including self-adhesive vinyl) - acrylic (PMMA) - polystyrene (PS) - polypropylene (PP) - acrylonitrile-butadiene-styrene (ABS) - polylactic acid (PLA)
- demonstrate knowledge of the following thermosetting polymers: - polyester resin - epoxy resin.
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Polymers. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which statement correctly describes a thermosetting polymer? A. It can be softened and reshaped many times B. It sets hard once and cannot be remelted C. It is always made from plant sources D. It is the easiest type of polymer to recycle Answer: B
- Which polymer is most commonly used for clear, lightweight drinks bottles? A. PVC B. HDPE C. PET D. Polyester resin Answer: C
- Self-adhesive vinyl used for vehicle graphics and shop-window signs is a film made mainly from which polymer? A. Acrylic (PMMA) B. PVC C. LDPE D. ABS Answer: B
- Which property of polypropylene makes it ideal for the living hinge in a document folder? A. Optical clarity B. High melting point C. Resistance to repeated flexing (fatigue resistance) D. Electrical conductivity Answer: C
- Which statement about the biopolymer PLA is correct? A. It is made from crude oil B. It is renewable and compostable only in industrial conditions C. It cannot be used in 3D printing D. It biodegrades quickly in any environment including the sea Answer: B
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Akwai a cikin manhajar Green Bridge
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Yi Aikin Tambayoyin Gwaji
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