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In a cross-linking reaction of unsaturated polymers, hydrogen abstraction usually occurs at which positions along the polymer backbone?

Which of the following describes the process of Polymer drawing?

Which of the polymers listed below are currently mostly recycled?

In the reaction below:                     The urethane groups once formed can react further with any free isocyanate present upon heating to form a new group called:

The following methods can be used to induce cross-linking of polymer chains by photolysis except:

The following are true about the use of Lexan except:

Which monomer and which type of initiator would you use to synthesize the following polymer?        

Which polymer below will have the highest Glass Transition temperature (Tg)?                               

The number average molecular weight of poly(vinyl chloride) formed from vinyl chloride is 37,400 g/mol. If the polydispersity index (PDI) of the polymer formed is 1.5, determine the weight-average molecular weight (Mw) of the polymer.

A sample of poly(vinyl chloride) is found to have a number-average molar mass of 75,200 g/mol. Neglecting contributions from end groups, what is the number-average degree of polymerization (Xn) of this sample? (Molecular mass of Vinyl chloride = 62.498 g/mol)