Which of the following is true for the resultant polymer product formed, when molecules of pthalic acid react with molecules of glycerol?

cross-link polymer

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linear polymer

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branch polymer

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none of mentioned

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Solution

The correct option is A cross-link polymer
The reaction between pthalic acid and glycerol initially results into linear or branched polymer but, due to trifunctionality of glycerol, ultimately cross-linking takes place between the molecules.

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