Glyptal is a polymer heavily utilized in the commercial manufacture of paints and lacquers. Structurally, what distinguishes the rigid resin Glyptal from the highly crystalline fibre Terylene (Dacron)

Question

Glyptal is a polymer heavily utilized in the commercial manufacture of paints and lacquers. Structurally, what distinguishes the rigid resin Glyptal from the highly crystalline fibre Terylene (Dacron)?

Prashant Kotian · Accepted Answer

Correct answer: B. Both share ethylene glycol as a diol. However, Glyptal uses phthalic acid (ortho isomer), which prevents close chain packing and yields a resin. Terylene uses terephthalic acid (para isomer), which packs perfectly into fibres.

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