Facile Determination of Molecular Structure Trends in Amphiphilic Core Corona Star Polymer Synthesis via Dielectric Property Measurement. Issue 15 (17th June 2016)

• Record Type: Journal Article
• Authors: Hild, Frederic; Nguyen, Nam T.; Deng, Eileen; Katrib, Juliano; Dimitrakis, Georgios; Lau, Phei‐Li; Irvine, Derek J.
• Is Part Of: Macromolecular rapid communications. Volume 37:Issue 15(2016)
• Page Start: 1295
• Page End: 1299
• Publication Date: 2016-06-17
• Subjects: cavity perturbations -- dielectric properties -- star polymers -- structure determination; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201600149
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract : The use of dielectric property measurements to define specific trends in the molecular structures of poly(caprolactone) containing star polymers and/or the interbatch repeatability of the synthetic procedures used to generate them is demonstrated. The magnitude of the dielectric property value is shown to accurately reflect: (a) the number of functional groups within a series of materials with similar molecular size when no additional intermolecular order is present in the medium, (b) the polymer molecular size for a series of materials containing a fixed core material and so functional group number, and/or (c) the batch to batch repeatability of the synthesis method. The dielectric measurements are validated by comparison to spectroscopic/chromatographic data. Abstract : This plot of real permittivity ( ε ′) value against temperature for star poly(caprolactine)s initiated with pentaerythritol ethoxylate/trimethylolpropane ethoxylate shows this dielectric property measurement can be used to demonstrate that: (a) star polymers synthesized using conventional and microwave heating result in very similar molecular structures, and (b) different star structures can be differentiated by this property.