New route to functional polyolefins: sulfonation of poly[ethylene‐co‐(5,7‐dimethylocta‐1,6‐diene)] and evaluation of properties

Abstract

An ethylene/5,7‐dimethylocta‐1,6‐diene copolymer was sulfonated using two different approaches, solution and surface modification, varying parameters such as reaction time, temperature and concentration of the sulfonation reagent. Techniques such as attenuated total reflectance Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy and elemental analysis confirmed the successful sulfonation of the copolymer by both methods. Water uptake studies showed that the polarity of the initial copolymer was markedly changed upon functionalization and that the sulfonation by the in‐solution method produced more hydrophilic polymers compared to the surface procedure. Moreover, differential scanning calorimetry and thermogravimetric analysis pointed out additional changes to the thermal properties of the sulfonated polymers relative to the copolymer precursor. This study showed that the sulfonation process of the non‐polar ethylene–diene copolymer led to a new hydrophilic material with a potential wide range of applications. © 2017 Society of Chemical Industry

Polypropylene microfibers via solution electrospinning under ambient conditions

“…Despite their unique features in the field, they have a number of limiting characteristics owing to compose of only nonpolar carbon and hydrogen atoms, which lead to incompatibility with other compounds . In order to overcome this disadvantage, the chemical modification of polyolefins by insertion of polar functional groups, utilizing traditional techniques, has been reported in recent years . The introduction of polar halogen atoms (fluorine, chlorine, bromine, or iodine), even at low concentrations as a reactive group to the nonpolar backbone of polyolefins, is one of the most effective techniques to improve the polarity and compatibility of these polymers .…”