Homopolymers as structure-driving agents in semicrystalline block copolymer micelles

ACS Nano
Georgios RizisAdi Eisenberg

Abstract

A simplified hierarchical self-assembly strategy is presented in which homopolymer additives are used to manipulate the crystallization-driven self-assembly of block copolymer micelles in selective media. By first incorporating the appropriate homopolymer chains within the micelle core, the system then evolves passively to yield crystalline platelets. These lamellae may be considered as self-assembled analogues of the traditional polymeric single crystal, which can be challenging or laborious to obtain otherwise. Used here as the test systems are micelles bearing polycaprolactone as the crystalline subphase in water and a mixed hydrophilic corona of poly(ethylene oxide) and poly(acrylic acid) the composition of which was varied methodically. Comicellization with homo-PCL has no influence at first; instead, the assemblies undergo morphological changes hierarchically, which were probed by electron microscopy and light scattering measurements. For all materials, the final product is consistently lamellar and micrometer-sized; however, lamellar shape variations are encountered as the stabilizing corona is altered. Such lamellae are unexpected based on the composition of most copolymers used here. The phenomenon also depends highly ...Continue Reading

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Citations

Oct 25, 2016·Chemical Society Reviews·Chunhua CaiLiquan Wang
Nov 3, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Xingjuan ZhaoHong-Guo Liu
Dec 20, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Zaizai TongGuohua Jiang
May 10, 2017·ACS Applied Materials & Interfaces·Jun-Huan LiChristine K Luscombe
Mar 27, 2020·Chemical Communications : Chem Comm·Shaofei SongMitchell A Winnik
Feb 3, 2018·ACS Central Science·Maria InamRachel K O'Reilly
Oct 29, 2017·Journal of the American Chemical Society·Maria C ArnoRachel K O'Reilly

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