Thermoresponsive Pyrrolidone Block Copolymer Organogels from 3D Micellar Networks.

ABSTRACT: A new series of amphiphilic pyrrolidone diblock copolymers poly[N-(2-methacrylaoyxyethyl)pyrrolidone]-block-poly(methyl methacrylate) (PNMP _m -b-PMMA _n ; where m is fixed at 37 and n is varied from 45 to 378) is developed. Spontaneously situ-gelling behaviors are observed in isopropanol when n varies from 117 to 230, whereas only dissolution or precipitation appears when n is beyond this region. Further analysis reveals that uniform thermoinduced reversible gel-sol transitions are observed in those organogels, which is attributed to the disassembly from micellar networks to micelles as confirmed by electron microscopy and other techniques. The gel-sol transition temperature is highly dependent on n

SUBMITTER: Cheng S 

PROVIDER: S-EPMC6640968 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature