Polymer-In-Our-Life (1).pptx

8/19/2019 Polymer-In-Our-Life (1).pptx

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Polymer In Our Life A polymer is a large molecule or macromolecule composed of

many repeated subunits. Because of their broad range of

properties, both synthetic and natural polymers play an essential

and ubiquitous role in everyday life. Polymers range from familiar

synthetic plastics such as polystyrene to natural biopolymers such

as DA and proteins that are fundamental to biological structureand function. Polymers have both natural and synthetic, are

created via polymeri!ation of many small molecules, "no#n as

monomers. $heir consequently large molecular mass relative

to small molecule compounds produces unique physical

properties, including toughness, viscoelasticity, and a tendency to

form glasses and semicrystalline structures rather than crystals.


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Appearance of real linear polymer chains as recorded using an atomic force

microscope on a surface, under liquid medium. %hain contour length for this

polymer is &'() nm* thic"ness is &(.) nm.


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$#o $ypes Of Polymers

• Polymers are of t#o types+

• atural polymeric materials such

as shellac, amber, #ool, sil" and natural rubber have been used

for centuries. A variety of other natural polymers eist, such

as cellulose, #hich is the main constituent of #ood and paper.

• $he list of synthetic polymers includes synthetic

rubber, phenol formaldehyde resin

-or Ba"elite, neoprene, nylon, polyvinyl chloride -P/% or

vinyl, polystyrene,polyethylene, polypropylene , polyacryloni

trile, P/B, silicone, and many more.


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Polymer 0iber

• 0iber is a natural or synthetic string or used as a component of

composite materials or #hen matted into sheets, used to ma"e

products such as paper, papyrus, or felt.

• 0ibers are often used in the manufacture of other materials.

$he strongest engineering materials often incorporate fibers,

for eample carbon fiber and ultra1high1molecular1#eight

polyethylene.

• 2ynthetic fibers can often be produced very cheaply and in

large amounts compared to natural fibers, but for clothingnatural fibers can give some benefits, such as comfort, over

their synthetic counterparts.


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atural 0ibers

• %otton is a soft, fluffy staple fiber that gro#s in a boll or

protective capsule around the seeds of cotton plants of the

genus 3ossypium in the family of 4alvaceae.

• $he fiber is almost pure cellulose.


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• Wool is the tetile fiber obtained from sheep

and certain other animals, including cashmere

from goats, mohair from goats, qiviut frommus"oen, angora from rabbits, and other

types of wool from camelids.

5ool 6ust before processing.


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CASHMERE

MOHAIR GOAT

ANGORA RABBIT


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• Silk is an animal protein fiber produced by

certain insects to build their cocoons and

#ebs. 4any different types of silk are produced by a huge variety of different types

of insects other than moth caterpillars.

2il" sari #eaving 2il" sari


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• Nylon fibers are one of the fibers having the

longest history among synthetic fibers. $hey areused for a variety of uses from clothing to home

furnishings and industrial uses. In nylon fibers,

there are many types depending on the ra#

materials.

•

Nylon


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• Acrylic fibers are synthetic fibers made from a

polymer -polyacrylonitrile #ith an averagemolecular #eight of &7((,(((, about 78(( monomer

units. $o be called acrylic in the 9.2, the polymer

must contain at least :;< acrylonitrile monomer.


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EXPERIMENT IS DOING!!!


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$etile 0ibers Burning $est

• atural 0ibers

%otton

-atural cellulosic fiber

- Burns, doesn=t melt.

- 2mells li"e burrning paper or #ood.

-

>esidue + 0ine gray ash.


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5ool

atural protein fiber.• Burns, doesn=t melt.

• 2trongly smells of burning hair or feathers.

•

2tops burning #hen removed from fire.• >esidue + Blac" hollo# bead that can be

crushed to blac" po#der.


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2il"

atural protein fiber.• Burns, doesn=t melt.

• 2mells of burning hair of feathers + odoris not

as strong as #ith #ool -sil" doesn=t containsulphur.

• 2tops burning #hen removed from fire.

• >esidue + Blac" hollo# bead that can becrushed to blac" po#der.


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ylon

• 2hrin"s from heat, melts, can burn.

• 2mells a bit li"e celery.

• >esidue + ?ard cream or blac" coloured bead that

cannot be crushed.

Acryclic• 2hrin"s from heat, melts and burns.

• 2potters #hen burning.

•

Acrid smell.• >esidue + ?ard blac" bead that can be partially

crushed


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THANK YOU

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Polymer-In-Our-Life (1).pptx