with the For a poly(hexamethylen-adipamide) polymerization degree of 200, write the structure and compute the exact and approximate molecular mass.

Monomers/initators used in free radical polymerization i) What monomer can be used with benzoyl peroxide and under what conditions? ii) What monomer can be used with di-tert-butyl peroxide and under what conditions? iii) What monomer can be used with hydrogen peroxide and under what condition?

d) Early in the polymerization at lower conversion of the MVK monomer, the polymer chains formed are primarily linear. However, close to the end of the reaction, as most of the monomer is consumed, branched polymers may start to appear. Propose a possible rationale for the formation of branched polymer structures (hint: consider the types of termination reactions that may compete with polymerization when only little monomer is still present). 로 3 3 linear vs. branched

1. What is Tacticity, show syndiotactic, isotactic and atactic polymer. Which is easiest to crystallize and why.

What is Macromolecular hypothesis, what is contribution of Staudinger, Carothers, and Paul Flory to Polymer science.

Determine the change in kinetic chain length if the concentration of monomer decreases by 6.5 and the concentration of initiator increases by 4.9 during chain polymerization? 9.29 14.39 31.85 2.94

f. An alternating copolymer is known to have a number-average molecular weight of 250,000 g/mol and a degree of polymerization of 3500. Compute the repeat unit molecular weight of copolymer.

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