Viscosimetry of Polymers and Polyelectrolytes

Santamarı́a, Anton

doi:10.1002/macp.200500485

Cited by 1 publication

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“…Thermogravimetric analysis was obtained in a TGA 2050 from TA Instruments with a heating rate of 20 °C/min. The viscosity average molecular weight ( M v ) was determined following the Mark–Houwink–Sakurada equation using polymeric solutions at 1.0 g/mL in a μVISC-m RheoSense Inc. viscosimeter, and the results were in agreement with gel permeation chromatography (GPC) and NMR data. − Contact angle measurements (θc) were carried out in an OCA15EC Dataphysics Instrument. The measurements were performed on the surface of a freshly prepared tablet.…”

Section: Methodsmentioning

confidence: 77%

Controlled Branching by Step-Growth Polymerization of Xylitol and Succinic Acid via Microwave Irradiation

et al. 2021

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Copolymerization of xylitol usually yields cross-linked materials. In this work, microwave-assisted polyesterification of xylitol and succinic acid produced materials with diverse molecular weights and different branching degrees, and more importantly, no cross-linking was observed, as supported by the solubility behavior and spectroscopic data. Reactions were carried out for short times, less than 20 min, which is not common for production of industrial polyesters. Control over the branching degree was achieved by tuning the reaction conditions, such as temperature, time of exposure, and monomer ratio, during microwave irradiation. No solvent or catalyst was employed during the step-growth polymerization.

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