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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: Biomaterials. 2008 Dec 7;30(6):1232–1245. doi: 10.1016/j.biomaterials.2008.10.064

Table 2.

Physicochemical characteristics of selected poloxamer block copolymers.

Copolymer Molecular massa Average no. EO units (x)b Average no. PO units (y)c Hydrophilic-lipophilic balance (HLB)c Critical micelle concentration (CMC), % w/vd
Pluronic L61 2000 4.6 31.0 3 0.02
Pluronic P85 4600 52.3 39.7 16 0.03
Pluronic F127 12600 200 65.2 22 0.004
Pluronic F68 8400 153 29.0 29 0.4
a

Average molecular weights provided by the manufacturer (BASF, Wyandotte, Michigan)

b

The average number of ethylene oxide (EO) and propylene oxide (PO) units

c

Hydrophilic-lipophilic balance (HLB) values of the copolymers and the cloud points were determined by manufacturer (BASF, Wyandotte, Michigan)

d

CMC values were determined previously using pyrene probe [48].