Consider synthesis of poly(ethylene terephthalate) by polyesterification. Rate c

Question

Consider synthesis of poly(ethylene terephthalate) by polyesterification. Rate constants for polyesterification are 10-2 (L mol-1)2 s-1 (no catalyst added) and 2x10-2 L mol-1s-1 (catalyst added).

A) How long would it take to prepare a polyester of weight average molecular weight 3,000 under each set of conditions? Given that the initial dicarbixilic acid concentration is 3 mol L-1.

B)If 5 mol% excess of diol were to be used in the previous problem, what number average molecular weight would be obtained if the reactions were carried to the same conversion?

Explanation / Answer

Answer:

diol + carboxylic acid Polyester

Production of polyester follows second order kinetics.

2.303log(A/B) = kt([A0]-[B0]) -2.303log[A0][B0]

More information required to solve this.

= 10-2*

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.