Abstract:

Various light scattering data for polycaprolactone (PCL) grafted silica nanoparticles, GPC and TGA data are also presented for various brush length and grafting density PCL functionalized nanoparticles.

Suggested Citation:

Kyle Bentz, Daniel Savin. 2016. Investigation of Grafting Reactions of Polycaprolactone on Silica Nanoparticles. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N72F7KF1

Purpose:

To determine molecular properties of grafted PCL onto silica nanoparticles.

Data Parameters and Units:

Raw DLS Data: DLS: Dynamic light scattering; Θ: Scattering angle (radians); Θ: Scattering angle (degrees); Γ: Decay constant (s-1); q: Scattering vector (m-2 or m); Rh: Hydrodynamic radius (nm); Ref index: Refractive index; Wavelength (m); Slope; Dt: translational diffusion coefficient; Solvent Viscosity (cP); Solvent RI: Solvent Refractive Index; THF: tetrahydrofuran; NPs: Nanoparticles; Reaction time (min); Rush length; Mn: Number-average molecular weight; PDI: polydispersity index; Weight loss: molecular weight lost. Conditions: Immediately after dialysis, 24 hours after dialysis, 1 week after dialysis, Dried and redispersed, Aminated, Water, Bare NPs - Ethanol, COOH – Water, COOH – Water - 1 week sitting, COOH – DMF (dimethylformamide), Bare Ethanol, Thiol Ethanol, Micelles. Varying Grafting Density: Water 0:100 OH (hydroxyl group):Inert, Water 25:75 OH:Inert, Water 50:50 OH:Inert, Water 75:25 OH:Inert, Water 100:0 OH:Inert. THF Time to gel. Effect of Crosslinker: THF - Cross at 40min, 80min, 120min, 160 min, 200min, 240min, crosslinked. THF-Non-Cross at 40min, 80min, 120min, 160min, 200 min, 240 min, non-crosslinked. Raw TGA Data: TGA: Thermogravimetric Analysis; t: retention time (min); T: temperature (degrees C); M: mass (milligrams); M%: mass percent (in the TGA experiment, this number drops as more and more compound decomposes at higher temperature). Conditions: Snowtex: commercially available silica particle from Nissan Chemical (bare particle); oh (hydroxyl) functional; pcl (polycaprolactone) adsorbed polymer; grafted polymer - polymer functional; polymer functional at 1 hour, 2 hours, 3 hours, 4 hours, 5 hours; Alcohol functional; bare. Raw GPC Data: GPS: Gel permeation chromatography; RI Mode; Max Base; Min – retention time in minutes; Norm: normalized RI response in GPC experiment; RI: refractive index measurement during a gel permeation chromatography experiment, a change in refractive index is indicative of polymer eluting out of chromatography column; Grph ht adj: graph height adjustment.

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