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. Author manuscript; available in PMC: 2013 Jun 21.
Published in final edited form as: Biomacromolecules. 2012 Aug 3;13(9):2616–2623. doi: 10.1021/bm300847x

Table 1. Summary of the examined polymers.

Polymer Mw (g/mol) m n EO/PO HLB*
P188 8400 27 80 8/2 29
P1107 15000 20 58 7/3 24
PEG-8K 8000 0 182 ∞ Hydrophilic
P181 1750 32 2 1/9 3
P333 4950 60 17 3/7 9
P335 6500 56 37 5/5 15
*

HLB: hydrophile-lipophile balance. For PEO-PPO-PEO copolymers, HLB = -36m/(2n+m)+33, where m represents the number of repeat units in the PPO segment and n represents the number of repeat units in the PEO segment.21 In general, the higher the HLB, the higher the hydrophobicity of the copolymer is.