In the effort to reduce global dependence on petrochemicals, bio-sourced polymers are developed using monomers derived from renewable plant oils.
One such green material is Nylon-6,10, which is synthesized by the condensation polymerization of Monomer A (1,6-diaminohexane) and Monomer B (sebacic acid, derived from castor oil). The structures of these monomers are shown below:
Which of the following represents the correct repeating unit of the resulting polyamide, Nylon-6,10?
−[−NH(CH2)6NH−CO(CH2)10CO−]−-\text{[}-\text{NH}(\text{CH}_2)_6\text{NH}-\text{CO}(\text{CH}_2)_{10}\text{CO}-\text{]}-−[−NH(CH2)6NH−CO(CH2)10CO−]−
−[−NH(CH2)6NH−CO(CH2)8CO−]−-\text{[}-\text{NH}(\text{CH}_2)_6\text{NH}-\text{CO}(\text{CH}_2)_8\text{CO}-\text{]}-−[−NH(CH2)6NH−CO(CH2)8CO−]−
−[−NH(CH2)5NH−CO(CH2)8CO−]−-\text{[}-\text{NH}(\text{CH}_2)_5\text{NH}-\text{CO}(\text{CH}_2)_8\text{CO}-\text{]}-−[−NH(CH2)5NH−CO(CH2)8CO−]−
−[−NH(CH2)6CO−NH(CH2)8CO−]−-\text{[}-\text{NH}(\text{CH}_2)_6\text{CO}-\text{NH}(\text{CH}_2)_8\text{CO}-\text{]}-−[−NH(CH2)6CO−NH(CH2)8CO−]−