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Synthesis of poly( N ‐isopropylacrylamide) by distillation precipitation polymerization and quantitative grafting on mesoporous silica
Author(s) -
Jadhav Sushilkumar A.,
Brunella Valentina,
Miletto Ivana,
Berlier Gloria,
Scalarone Dominique
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.44181
Subject(s) - attenuated total reflection , materials science , poly(n isopropylacrylamide) , fourier transform infrared spectroscopy , grafting , chemical engineering , polymerization , polymer chemistry , polymer , dynamic light scattering , lower critical solution temperature , differential scanning calorimetry , thermogravimetric analysis , precipitation polymerization , mesoporous silica , copolymer , radical polymerization , nanoparticle , mesoporous material , chemistry , organic chemistry , nanotechnology , catalysis , physics , engineering , composite material , thermodynamics
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. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 44181.