Synthetic Polymers
Gbogbo ọrọ náà
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.
Ebumnobi
- 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
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Synthetic Polymers. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Synthetic Polymers? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
