Synthetic Polymers
Bayani Gaba-gaba
Polymers are giant molecules built from thousands of small repeating units, and they are everywhere: the plastic bottle in your bag, the non-stick coating on a frying pan, the polyester in your school uniform. Understanding how they are made, used, and disposed of connects organic chemistry directly to environmental science.
In this lesson you will learn the difference between addition and condensation polymerisation, how to draw repeat units and deduce monomers, and why the disposal of polymers is a global environmental challenge. You will also meet biopolyesters, a newer class of polymers designed to biodegrade.
Manufura
- know that an addition polymer is formed by joining up many small molecules called monomers
- understand how to draw the repeat unit of an addition polymer, including poly(ethene), poly(propene), poly(chloroethene) and (poly)tetrafluoroethene
- understand how to deduce the structure of a monomer from the repeat unit of an addition polymer and vice versa
- explain problems in the disposal of addition polymers, including: - their inertness and inability to biodegrade - the production of toxic gases when they are burned.
- know that condensation polymerisation, in which a dicarboxylic acid reacts with a diol, produces a polyester and water
- understand how to write the structural and displayed formula of a polyester, showing the repeat unit, given the formulae of the monomers from which it is formed including the reaction of ethanedioic acid and ethanediol:
- know that some polyesters, known as biopolyesters, are biodegradable
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Katunan tunawa
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Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Synthetic 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.
- In addition polymerisation, the monomer must contain: A) An -OH group B) A C=C double bond C) A -COOH group D) A halogen atom Answer: B
- What is produced alongside the polymer in condensation polymerisation? A) Hydrogen B) Carbon dioxide C) Water D) Nothing Answer: C
- Which polymer is made from chloroethene? A) Poly(ethene) B) Poly(propene) C) Poly(chloroethene) D) Poly(tetrafluoroethene) Answer: C
- Addition polymers are difficult to dispose of because they are: A) Soluble in water B) Radioactive C) Non-biodegradable D) Explosive Answer: C
- A polyester is formed from a dicarboxylic acid and a: A) Diamine B) Diol C) Diketone D) Dialdehyde Answer: B
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Yi aikin wadannan tambayoyi a cikin manhaja
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