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Polymer Technology

Polymer Technology
__________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.

Phenolic
Epoxy
Amino
Alkyd

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Polymer Technology
Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are

50°C and 3 - 4 kg/cm²
250°C and 10 kgf/cm²
250°C and 1 kgf/cm²
50°C and 1 kgf/cm²

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Polymer Technology
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic

Tubings
Filaments
Pipes
Buckets

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Polymer Technology
In condensation polymerisation as compared to addition polymerisation

No co-product is lost
Generally only one monomer is involved
The monomers are unsaturated compounds
The monomers contain two functional groups

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Polymer Technology
Perspex can be used as a substitute of glass. Its monomer is

DMT
Tetrafluroethylene
Methyl methacrylate
Butadiene

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Polymer Technology
Density of low density polythene is about __________ gm/c.c.

0.38
0.91
0.81
0.56

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