Exploration of the modification-induced self-assembly (MISA) technique and the preparation of nano-objects with a functional poly(acrylic acid) core. Issue 28 (1st July 2022)

• Record Type: Journal Article
• Authors: Zhou, Peng; Shi, Boyang; Liu, Yuang; Li, Penghan; Wang, Guowei
• Is Part Of: Polymer chemistry. Volume 13:Issue 28(2022)
• Page Start: 4186
• Page End: 4197
• Publication Date: 2022-07-01
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/d2py00666a
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : The hydrolysis-based post-polymerization modification method was introduced into the self-assembly process and a modification-induced self-assembly (MISA) technique was presented. Abstract : The hydrolysis-based post-polymerization modification method was introduced into the self-assembly process and a modification-induced self-assembly (MISA) technique was presented. The diblock copolymer poly(styrene)- b -poly( tert -acrylate) (PS- b -P t BA) was employed as a precursor, trifluoroacetic acid (TFA) was used as a modifying agent, and toluene was used as the solvent. With the gradual hydrolysis of the P t BA block, the generated poly(acrylic acid) (PAA) block showed reduced solubility in toluene and induced an in situ self-assembly process. By modulating the degree of polymerization of the P t BA block (DPP t BA ), weight solids content (up to 15.0% w/w), the morphological evolution of the MISA process was investigated, and a series of spherical, worm-like and vesicular nano-objects were obtained. By modulating the topology of copolymers, such as the triblock copolymers PS- b -P t BA- b -PS and P t BA- b -PS- b -P t BA and star-shaped copolymers Star-(P t BA- b -PS)4 and Star-(PS- b -P t BA)4, it was observed that the topology also played an important role in the self-assembly behavior. As an alternative route to self-assembly, the MISA technique comprehensively combined the merits of the conventional self-assembly and the recently developed polymerization-induced self-assembly (PISA) techniques.