pvc
TRANSCRIPT
PVCWhat is PVC?PVC (Poly Vinyl Chloride) is a versatile
thermoplastic material obtained from ethylene and salt by vinyl chloride polymerisation
It is the best explored materials in the world due to serious scientific researches carried in order to disprove accusations
Synthesis of PVCSuspension polymerisation:First the raw material VCM is pressurized
and liquified and then fed into the polymerisation reactor which contains water and suspending agents
Through high speed agitation within the reactor small droplets of VCM are obtained
Next the initiator is fed into the reactor
PVC is produced by reaction under a few bar at 40⁰ C – 60⁰ C
PVC obtained through suspension polymerisation is suspended in water as particles of 50 – 200 µm
Therefore the slurry discharged from the polymerisation reactor is stripped of residual monomer, dehydrated and the particle size is controlled by screening to yield PVC in the form of white powder
Applications of PVCConstruction windows :PVC has been used as construction product
for half a centuryUnplasticized PVC is one of the stiffest
polymers at normal temperature and shows little deterioration after many years in service
Health Care – Blood Bags:Flexible PVC is used to make storage bags
and in fact the only material approved by the European pharmacopoeia
The other health care products of PVC are i)Artificial skin ii)Blood transfusion sets
iii) Blood vessels for artificial kidneys
Electronic Cables:PVC was first used as cable insulation as a
replacement for rubber during second world war
PVC cables do not harden and crack over time and find use in many application from tele communications to electric blankets
These cables are recyclable by recovinyl
Automotives – Cars:PVC brings both high performance qualities
and important cost benefits to the automotive industry
Instrument panels, seat coverings, head lining, protective strips, floor coverings and anti stone damage protection are things done by using PVC
Sports:PVC fabric has been used to create new
sporting venues in London alonePVC products applications performed well in
making sports surfaces, sports equipment and clothing
i) Protective barriers ii) Matting and wiring
Propertiesi) Weathering stability:
PVC is resistive to aggressive environmental factors is therefore the material of choice for roofing
ii) Versatility:PVC can be flexible and rigid
iii) Fire Protection:PVC is a material resistant to ignition due to its chlorine content
iv) Longevity:PVC products can last upto 100 years and even more
v) Energy Recovery: PVC has high thermal power When utilized in incinerators PVC provides power and heat for home and industry
vi) Barrier Properties:PVC can be made impervious to liquids and vapours
vii) Recyclability:PVC is recyclable more than other plastics
viii) Economical Efficiency:PVC is the cheapest of the large tonnage polymers providing many products with the best quality price ratio
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