Download - POLYMERS.ppt
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PLASTICPLASTIC FIBERFIBER ELASTOMERELASTOMER
Made by: Himalay sahuMade by: Himalay sahu
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objectivesobjectives By the end of the class, students By the end of the class, students
should be able should be able To explain the importance of proper To explain the importance of proper
disposal of synthetic polymersdisposal of synthetic polymersTo suggest ways to dispose of To suggest ways to dispose of
synthetic polymers in order to synthetic polymers in order to preserve the environmentpreserve the environment
To practice good habits in disposing To practice good habits in disposing of synthetic polymersof synthetic polymers
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What is What is Polymer ?!Polymer ?!o Food?Food?o Bag?Bag?o Animal?Animal?o Plant?Plant?o Cloth?Cloth?
o Or what?Or what?
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POLYMERSPOLYMERS
large molecules made up of many large molecules made up of many smaller and identical repeating smaller and identical repeating units units
-> -> monomersmonomers These repeating units joins These repeating units joins
together by together by
covalent bondscovalent bonds
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POLYMERSPOLYMERS
The chemical process that join The chemical process that join the monomers together the monomers together
- - POLYMERISATIONPOLYMERISATION
Polymerisation can be divided Polymerisation can be divided into 2 types :into 2 types : addition polymerisationaddition polymerisation condensation polymerisationcondensation polymerisation
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POLYMERSPOLYMERS
Polymers can be divided into 2 Polymers can be divided into 2 types :types :
naturally occurring polymersnaturally occurring polymers
synthetic polymerssynthetic polymers
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naturally occurring naturally occurring polymerspolymers
Polymers that exist in plants or Polymers that exist in plants or animalsanimals
Types of naturally occurring polymers Types of naturally occurring polymers proteinprotein : muscles: muscles carbohydrates carbohydrates : cellulose: cellulose natural rubbernatural rubber : latex: latex
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synthetic polymerssynthetic polymers
Polymers made in industry from Polymers made in industry from chemical substanceschemical substances
Scientists are able to copy Scientists are able to copy structures of natural polymers to structures of natural polymers to produce synthetic polymers produce synthetic polymers trough scientific researchtrough scientific research
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synthetic polymerssynthetic polymers
many of raw materials for many of raw materials for synthetic polymers are obtain synthetic polymers are obtain fromfrom
-> petroleum-> petroleum types of synthetic polymerstypes of synthetic polymers
plasticsplastics fibersfibers elastomerselastomers
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plasticsplastics
composed of polymers of composed of polymers of carbon and hydrogen alone or with and hydrogen alone or with oxygen, nitrogen, chlorine or oxygen, nitrogen, chlorine or sulfur in the backbone sulfur in the backbone
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plasticsplastics
Properties of plastics :-Properties of plastics :- LightLight strong strong malleable malleable inert to chemicalinert to chemical insulators of electricity insulators of electricity
and heatand heat
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plasticsplastics
example of plastics are :-example of plastics are :- polythene (polyethylene)polythene (polyethylene) polyvinylchloride (PVC)polyvinylchloride (PVC) polypropene (polypropylene)polypropene (polypropylene) polystyrenepolystyrene PerspexPerspex BakeliteBakelite
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fibersfibers
long chain polymers that long chain polymers that withstand withstand stretchingstretching
example of fibers are :-example of fibers are :-polyamide nylon, polyamide nylon, teryleneterylenephenol-formaldehyde (PF)phenol-formaldehyde (PF)acrylic polymersacrylic polymers
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elastomerselastomers
polymer that can regain its polymer that can regain its original shape after being original shape after being stretched or pressedstretched or pressed
example of elastomers are :-example of elastomers are :-Styrene-butadiene rubber(SBR)Styrene-butadiene rubber(SBR)Polyisoprene (IR) Polyisoprene (IR) Polybutadiene (BR) Polybutadiene (BR) Chloroprene Rubber (CR) Chloroprene Rubber (CR)
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What is What is the the
impacts impacts of of
synthetic synthetic polymers polymers towards towards
human human and and
environmenvironment?ent?
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Environmental Environmental pollution pollution !!!!!!
Most of the polymers are non-Most of the polymers are non-biogradeablebiogradeable
Cannot be decomposed by Cannot be decomposed by bacteria / decomposerbacteria / decomposer
So… caused disposal problem So… caused disposal problem when polymer not decaywhen polymer not decay
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Environmental Environmental pollution pollution !!!!!!
Plastics items discardedPlastics items discarded Blockage of drainage systems & Blockage of drainage systems &
riversrivers So… caused flash floodsSo… caused flash floods
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Environmental Environmental pollution pollution !!!!!!
Polymer containers not buried in Polymer containers not buried in the groundthe ground
Become breeding ground for Become breeding ground for mosquitoesmosquitoes
So… caused diseases such as So… caused diseases such as denguedengue
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Environmental Environmental pollution pollution !!!!!!
The non-biogradeable polymers The non-biogradeable polymers thrown into rivers -> lakes -> thrown into rivers -> lakes -> seasseas
Swallowed by aquatic animalsSwallowed by aquatic animals Animals die due to chockingAnimals die due to chocking
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That’s not the That’s not the only impacts of only impacts of
plasticsplastics
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Ways to dispose Ways to dispose synthetic polymer synthetic polymer
properlyproperly PYROLISIS-burn without oxygenPYROLISIS-burn without oxygen
INCINERATION-gas is filteredINCINERATION-gas is filtered
INVENT A BIODEGRADEABLE INVENT A BIODEGRADEABLE SYNTHETIC POLYMERSYNTHETIC POLYMER
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CATEGORY Code Example DENSITY
1 PETE Pop bottlePeanut butter jar
Mylar
1.38 – 1.39
2 HDPE Milk jugShampoo bottle
0.95 – 0.97
3 V Pipes and fittings, pill bottles, shower curtains, garden hoses, tile, leather like luggage and
upholstery
1.15 – 1.35
4 LDPE Trash bagsDiaper liners
0.92 – 0.94
5 PP Indoor/outdoor carpeting, kitchenware
0.90 – 0.91
6 PS StyrofoamPen casing
Clear plastic cups
1.05 – 1.07
7 OTHER Toothpaste and cosmetic containers
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PRACTISING GOOD HABITS IN PRACTISING GOOD HABITS IN DISPOSING OF SYNTHETIC DISPOSING OF SYNTHETIC
POLYMERSPOLYMERS
1.1. Separate the synthetic Separate the synthetic polymers from other wastes.polymers from other wastes.
2.2. RecycleRecycle
3.3. ReuseReuse
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3) State environmental disaster 3) State environmental disaster occurs due to improper disposal of occurs due to improper disposal of plastics.plastics.
Flash floodFlash flood
acid rainacid rain
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Conclusions:-Conclusions:-
There are ways to dispose There are ways to dispose synthetic polymers:synthetic polymers:
a) pyrolisisa) pyrolisis
b) incenerationb) inceneration
c) use biodegradable c) use biodegradable synthetic synthetic polymerspolymers
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Good habits in disposing of Good habits in disposing of synthetic polymers:synthetic polymers:
a) recyclea) recycle
b) reuseb) reuse
c) separate synthetic polymers c) separate synthetic polymers from from the other wastesthe other wastes
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THANKTHANK
YOUYOU….!!!….!!!