Abstract
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.
| Original language | English |
|---|---|
| Article number | 44181 |
| Journal | Journal of Applied Polymer Science |
| Volume | 133 |
| Issue number | 44 |
| DOIs | |
| Publication status | Published - 20 Nov 2016 |
Keywords
- nanoparticles
- nanowires and nanocrystals
- radical polymerization
- stimuli-sensitive polymers
- surfaces and interfaces
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