Synthesis and Characterization of All-Acrylic Tetrablock
Copolymer Nanoparticles: Waterborne Thermoplastic Elastomers via One-Pot
RAFT Aqueous Emulsion Polymerization
Posted on 2024-02-14 - 20:33
Reversible addition–fragmentation chain transfer
(RAFT)
aqueous emulsion polymerization is used to prepare well-defined ABCB
tetrablock copolymer nanoparticles via sequential monomer addition
at 30 °C. The A block comprises water-soluble poly(2-(N-acryloyloxy)ethyl pyrrolidone) (PNAEP), while the B and
C blocks comprise poly(t-butyl acrylate) (PtBA) and
poly(n-butyl acrylate) (PnBA), respectively. High
conversions are achieved at each stage, and the final sterically stabilized
spherical nanoparticles can be obtained at 20% w/w solids at pH 3
and at up to 40% w/w solids at pH 7. A relatively long PnBA block
is targeted to ensure that the final tetrablock copolymer nanoparticles
form highly transparent films on drying such aqueous dispersions at
ambient temperature. The kinetics of polymerization and particle growth
are studied using 1H nuclear magnetic resonance spectroscopy,
dynamic light scattering, and transmission electron microscopy, while
gel permeation chromatography analysis confirmed a high blocking efficiency
for each stage of the polymerization. Differential scanning calorimetry
and small-angle X-ray scattering studies confirm microphase separation
between the hard PtBA and soft PnBA blocks, and preliminary mechanical
property measurements indicate that such tetrablock copolymer films
exhibit promising thermoplastic elastomeric behavior. Finally, it
is emphasized that targeting an overall degree of polymerization of
more than 1000 for such tetrablock copolymers mitigates the cost,
color, and malodor conferred by the RAFT agent.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Deane, Oliver
J.; Mandrelier, Pierre; Musa, Osama M.; Jamali, Mohammed; Fielding, Lee A.; Armes, Steven P. (2024). Synthesis and Characterization of All-Acrylic Tetrablock
Copolymer Nanoparticles: Waterborne Thermoplastic Elastomers via One-Pot
RAFT Aqueous Emulsion Polymerization. ACS Publications. Collection. https://doi.org/10.1021/acs.chemmater.3c03115
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
AUTHORS (6)
OD
Oliver
J. Deane
PM
Pierre Mandrelier
OM
Osama M. Musa
MJ
Mohammed Jamali
LF
Lee A. Fielding
SA
Steven P. Armes
KEYWORDS
transmission electron microscopytetrablock copolymers mitigatessoft pnba blocksdynamic light scatteringdifferential scanning calorimetryblock comprises water30 ° cpnba ), respectivelyhigh blocking efficiency>- butyl acrylateaqueous emulsion polymerization1 suppnaep ),high conversionsaqueous dispersions>- acryloyloxystudied usingsoluble polyprepare wellpoly (<ph 7ph 3particle growthoverall degreen malodor conferredethyl pyrrolidoneangle xambient temperature2 -(<