TY - JOUR
T1 - Synthesis of poly(N-isopropylacrylamide) by distillation precipitation polymerization and quantitative grafting on mesoporous silica
AU - Jadhav, Sushilkumar A.
AU - Brunella, Valentina
AU - Miletto, Ivana
AU - Berlier, Gloria
AU - Scalarone, Dominique
N1 - Publisher Copyright:
© 2016 Wiley Periodicals, Inc.
PY - 2016/11/20
Y1 - 2016/11/20
N2 - In this work, syntheses of thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) with different molecular weights were carried out in ethanol by distillation precipitation polymerization (DPP) technique. The synthesized polymers were fully characterized by attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy, nuclear magnetic resonance spectroscopy, and size exclusion chromatography techniques. The lower critical solution temperatures of the polymers were determined with differential scanning calorimetry. A simple and versatile method for the in situ synthesis and grafting of PNIPAM on mesoporus silica nanoparticles (MSNs) with improved control over quantitative grafting is devised. The PNIPAM grafted MSNs were characterized with ATR-FTIR, thermogravimetric analysis, transmission electron microscopy, and dynamic light scattering analyses. From the results obtained it is showed that quantitative grafting of PNIPAM on MSNs from 1 to 20% by weight can be tuned by manipulating the in situ DPP reaction conditions.
AB - In this work, syntheses of thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) with different molecular weights were carried out in ethanol by distillation precipitation polymerization (DPP) technique. The synthesized polymers were fully characterized by attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy, nuclear magnetic resonance spectroscopy, and size exclusion chromatography techniques. The lower critical solution temperatures of the polymers were determined with differential scanning calorimetry. A simple and versatile method for the in situ synthesis and grafting of PNIPAM on mesoporus silica nanoparticles (MSNs) with improved control over quantitative grafting is devised. The PNIPAM grafted MSNs were characterized with ATR-FTIR, thermogravimetric analysis, transmission electron microscopy, and dynamic light scattering analyses. From the results obtained it is showed that quantitative grafting of PNIPAM on MSNs from 1 to 20% by weight can be tuned by manipulating the in situ DPP reaction conditions.
KW - nanoparticles
KW - nanowires and nanocrystals
KW - radical polymerization
KW - stimuli-sensitive polymers
KW - surfaces and interfaces
UR - http://www.scopus.com/inward/record.url?scp=84979779070&partnerID=8YFLogxK
U2 - 10.1002/app.44181
DO - 10.1002/app.44181
M3 - Article
SN - 0021-8995
VL - 133
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
IS - 44
M1 - 44181
ER -