Table 1. Summary of triblock copolymers.

Polymer	Pluronic	Average MW (Da)	2PEO	PPO	PPO/PEO
P188	F68	8,400	160	27	0.17
Ext-P188	F108	14,600	280	44	0.16
P331	L101	3,700	14	54	3.86
PEG8000	—	8,000	—	—	—

Pluronic, BASF Corporation trademark designation; PEO, polyethylene oxide; PPO, polypropylene oxide.