Journal
POLYMER CHEMISTRY
Volume 13, Issue 12, Pages 1719-1730Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1py01636a
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- UNSW Mark Wainwright Analytical Centre
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Nanodimensional polymeric worms were synthesized using polymerization-induced self-assembly (PISA), with the core segment lightly crosslinked to potentially enable various applications.
Nanodimensional polymeric worms (fibers) are of significant interest for a variety of potential applications. Herein, we have used polymerization-induced self-assembly (PISA) implemented as aqueous reversible addition-fragmentation chain transfer (RAFT) polymerization to synthesize worms comprising a corona of poly(acrylic acid-stat-poly(ethylene glycol) methyl ether acrylate) and a core of poly(styrene-stat-n-butyl acrylate). Worms with theoretical glass transition temperatures (T-g) of 27.1 degrees C and -37.6 degrees C were synthesized based on two different molar ratios of styrene : n-butyl acrylate (70 : 30 and 20 : 80) for the core segment (second block). To date, there is limited knowledge available on PISA synthesis of worms of low T-g. Light crosslinking of the core-segments was achieved by introduction of a small amount of divinyl monomer, ethylene glycol diacrylate or poly(ethylene glycol) diacrylate, during PISA at the beginning of polymerization or after 2 h of polymerization. Comparison of the crosslinking efficiency for ethylene glycol diacrylate and poly(ethylene glycol) diacrylate showed that the water solubility of the crosslinker plays an important role in regard to maintaining the worm morphology and obtaining satisfactory crosslinking.
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