3501-16 - PLASTICS synthetic organic polymers capable of...

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PLASTICS - synthetic organic polymers capable of being molded and used in engineering applications. POLYMERS - extremely large molecules which are made up of smaller units called ______________ . Examples: Structure of Polyethylene (PE) Structure of Polyvinyl Chloride (PVC) FIRST COMMERCIAL PLASTIC - First commercial plastic was invented in 1910 by Leo Hendrik Baekeland (Belgian-born American), who combined Phenol and Formaldehyde to form Phenol-formaldehyde (PF) or ________ . (Characteristics: Electrically resistant, chemically stable, heat-resistant, shatter-resistant.) Two Major Types of Plastics : (1) THERMOPLASTICS - will soften when they are heated and harden when cooled, no matter how many times the cycle is repeated. (2) THERMOSETTING PLASTICS - harden (or "thermoset") in an irreversible process when heated. (2a) CHEMICALLY SETTING PLASTICS - harden by adding suitable chemicals. PRODUCTION OF PLASTICS RAW MATERIALS: - __________ from plant fibers - Derivatives from __________ (such as Phenol, cresols & naphthalene)
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3501-16 - PLASTICS synthetic organic polymers capable of...

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