| CPC C08L 53/025 (2013.01) [C08F 293/00 (2013.01); C08F 297/044 (2013.01)] | 19 Claims |

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1. A composition comprising:
a structure comprising
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an end group comprising at least one of lithium, sodium, or magnesium, wherein:
![]() symbolizes a covalent bond to a neighboring atom,
R2 is a functional group derived from at least one of a homocyclic molecule, a heterocyclic molecule, a polycyclic molecule, an aliphatic molecule, or an organo-phosphorous molecule,
1≤x≤1000, and
2≤z≤1000.
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