Poly worm micelles

Degradable Poly(ethylene oxide)-block-Polycaprolactone Worm Micelles... 

Fig. 67 Schematic of phase behaviour for blend of novolac epoxy resin with nearly symmetric poly(methyl acrylate-co-glycidylmelhacrylate)-0-polyisoprene. Ordered L can be swollen with up to about 30% of resin before macroscopic phase separation occurs, producing heterogeneous morphologies containing various amounts of L, C, worm-like micelles and pristine epoxy. At lower concentrations, disordered worm-like micelles transform into vesicles in dilute limit. According to [201]. Copyright 2003 Wiley...

Temperature-responsive behavior was also observed for gels formed by worm-like micelles of poly(styrene)-bZocA -poly(iV-isopropyl acrylamide). Poly(iV-isopro-pyl acrylamide) molecules are known to associate when the ambient temperature is increased above their lower critical solubihty temperature (LCST) of 32 °C [215]. When the gel was heated to a temperature above the LCST of the poly(A-isopropyl acrylamide) block, a nanofibrillar network was formed [167, 177]. The association of poly(A-isopropyl acrylamide) was reversible [215] cooling of the nanofibrillar gel led to dissociation of the polymer network. 

Amphiphilic block copolymers are well-known starting points for the preparation of micelles—either organized structures in the solid state or individual spherical or worm-like micelles suspended in a liquid medium. In polyphosphazene science, it is relatively easy to prepare diblock copolymers. As discussed above, both blocks can be phosphazenes or one can be a phosphazene and the other an organic polymer block or a poly(organosiloxane). Provided one block is hydrophilic and the other hydrophobic, micellar characteristics (Figure 1.15) are accessible. One example... 

Fig. 10 Structure of a -((PEE)-(PEO)-(poly(/-methyl-e-caprolactone))) miktoarm block terpoly-mer, along with schematic representations and cryo-TEM micrographs of the resulting self-assembled micellar structures hamburger , segmented worm-like and raspberry micelles (from left to right). Reproduced with permission from [56]. Copyright (2008) American Chemical Society...

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