Injection molded golf ball cores

1. A golf ball comprising:

a layer composed of a thermoplastic polyether ester elastomer, the thermoplastic polyether ester elastomer formed from a reaction of a polytetramethylene glycol (PTMO), a 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and dimethyl terephthalate; and

a cover layer disposed over the layer;

wherein the layer is a core or a mantle layer.

2. A golf ball comprising:

a core;

a mantle layer disposed over the core; and

a cover layer disposed over the mantle layer;

wherein at least one of the core, the mantle layer and the cover layer is composed of a thermoplastic polyether ester elastomer, the thermoplastic polyether ester elastomer formed from a reaction of a polytetramethylene glycol (PTMO), a 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and dimethyl terephthalate.

3. The golf ball according to claim 2 wherein the cover layer is composed of an ionomer material or a thermoplastic polyurethane material.