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Polymer Technology

Polymer Technology
Tyres are made by

Extrusion
Rotational moulding
Compression moulding
Injection moulding

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Polymer Technology
Molecular weight of polymers are in the range of

10 to 10³
10⁷-10⁹
10²-10⁷
10⁹-10¹¹

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Polymer Technology
Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used

For surface coating of automobiles & air crafts
For film forming materials
As plasticiser for PVC & nitrocellulose
For fibre making

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Polymer Technology
Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten

Saturated polyester
Either B or C
Polyurathane
Polystyrene

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Polymer Technology
Silicone resins, which are highly water repellant and has good heat resistance can not be used

Hydraulic fluid for heat transfer
Resin for lamination
As room temperature adhesive
As grease & lubricant

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Polymer Technology
Neoprene is rendered non-inflammable, because of

Its linear chain structure
Its cross-linked structure
The presence of chlorine atoms in its monomer
The absence of chlorine atoms in its monomer

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