Morphology and Emulsification of Poly(-2-(methacryloyloxy) ethyl pyrrolidone)--poly(benzyl methacrylate) Assemblies by Polymerization-Induced Self-Assembly.

In this work, a series of amphiphilic diblock copolymers poly(-2-(methacryloyloxy) ethyl pyrrolidone)--poly(benzyl methacrylate) (PNMP --PBzMA ) were developed by the dispersion polymerization method in ethanol. The polymerization-induced self-assembly (PISA) behaviors were studied systematically, and a comprehensive structure-property relationship was also established. Two distinct PISA tendencies were observed, which was mainly depended on the polymerization degree of PNMP segment.

Thermoresponsive Pyrrolidone Block Copolymer Organogels from 3D Micellar Networks.

A new series of amphiphilic pyrrolidone diblock copolymers poly[-(2-methacrylaoyxyethyl)pyrrolidone]--poly(methyl methacrylate) (PNMP --PMMA ; where is fixed at 37 and is varied from 45 to 378) is developed. Spontaneously situ-gelling behaviors are observed in isopropanol when varies from 117 to 230, whereas only dissolution or precipitation appears when 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.