Browsing University of Waterloo by Author "Duhamel, Jean"
Now showing items 21-27 of 27
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Quantifying the Level of Intermacromolecular Interactions in Ethylene-Propylene Copolymers by Using Pyrene Excimer Formation
Pirouz, Solmaz; Duhamel, Jean; Jiang, Sheng; Duggal, Akhilesh (American Chemical Society, 2015-07-14)A unique methodology based on fluorescence measurements is introduced to quantitatively measure the actual level of interpolymeric association between ethylene-propylene (EP) copolymers used as viscosity index improvers ... -
Quantitative Characterization of the Molecular Dimensions of Flexible Dendritic Macromolecules by Pyrene Excimer Fluorescence
McNelles, Stuart A.; Thoma, Janine L.; Adronov, Alex; Duhamel, Jean (American Chemical Society, 2018-02-12)Eight pyrene labeled dendrons (PyLDs) were prepared with a polyester backbone of bis(hydroxymethyl)propionic acid and the monomer and excimer fluorescence decays of the PyLDs were acquired and fitted according to the ... -
Surfactant-Structure Dependent Interactions with Modified Starch Nanoparticles Probed by Fluorescence Spectroscopy
Zhang, Qian; Kim, Damin; Li, Lu; Patel, Sanjay; Duhamel, Jean (American Chemical Society, 2019-02-05)The interactions between the surfactants sodium dodecyl sulfate (SDS) and sodium dioctylsulfosuccinate (AOT) and starch nanoparticles hydrophobically modified with the hydrophobic dye pyrene (Py-SNPs) were investigated in ... -
Temperature Response of Aqueous Solutions of Pyrene End-Labeled Poly(N-isopropyl acrylamide)s Probed by Steady-State and Time-Resolved Fluorescence
Fowler, Mike; Duhamel, Jean; Qiu, Xing Ping; Korchagina, Evgeniya; Winnik, Françoise M. (Wiley, 2018-02-15)Aqueous solutions of a series of monodisperse poly(N‐isopropylacrylamide)s end‐labeled with n‐butyl‐1‐pyrene at one or both chain ends (Pyn‐PNIPAMs with n = 1 or 2) were studied by turbidimetry, light scattering, and ... -
Temperature-Controlled Interactions Between Poly(N-isopropylacrylamide) Mesoglobules Probed by Fluorescence
Fowler, Michael Andrew; Duhamel, Jean; Qiu, Xing Ping; Korchagina, Evgeniya; Winnik, Françoise M. (American Chemical Society, 2018-02-23)Temperature-Controlled Interactions Between Poly(N-isopropylacrylamide) Mesoglobules Probed by Fluorescence Michael Andrew Fowlera, Jean Duhamel*a a Institute for Polymer Research, Waterloo Institute for Nanotechnology, ... -
Using Pyrene Excimer Fluorescence To Probe Polymer Diffusion in Latex Films
Casier, Remi; Gauthier, Mario; Duhamel, Jean (American Chemical Society, 2017-02-28)This study introduces a simple technique that can be used to quantitatively probe interparticle polymer diffusion (IPD) between adjacent particles in a latex film using pyrene excimer fluorescence (PEF). To demonstrate the ... -
Using Pyrene Excimer Fluorescence To Probe the Interactions between Viscosity Index Improvers and Waxes Present in Automotive Oil
Pirouz, Solmaz; Duhamel, Jean (American Chemical Society, 2017-03-28)A new methodology based on pyrene excimer fluorescence (PEF) was applied to quantitatively measure the actual level of intermolecular association between ethylene propylene (EP) copolymers in toluene in the presence of ...