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Styrene and substituted styrene grafted functional polyolefins via nitroxide mediated polymerization

Abstract

The grafting of (functionalized) polystyrene from bulk or surface-functionalized polyolefins via nitroxide mediated polymerization is described. High density polyethylene and a poly(ethylene-co-α-olefin) copolymer (EOC) modified with different functional 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) derivatives were used as macroinitiators for the “grafting from” polymerization of various styrene-based monomers to offer polyolefin-g-poly styrene graft copolymers. The successful grafting of styrene and styrene derivatives was demonstrated by complementary analyses such as infrared (ATR-FTIR) and NMR spectroscopies, size exclusion chromatography, thermogravimetric analysis, and differential scanning calorimetry. Typically, IR of the grafted copolymers showed the bands attributable to the aromatic moieties and the obtained thermograms evidenced a lower degradation temperature for the grafted copolymers compared to that of polyolefin starting materials. In addition, solid state 19F-NMR was chosen to confirm the growth of polystyrene (PS) chains when EOC functionalized with a fluoroalkyl TEMPO was used for the NMP. The extent of grafting of PS chains onto the polyolefin backbone was found to depend on the nature of macroinitiator, especially on the structure and cleavage temperature of alkoxy-amine derivatives created by TEMPO functionalization, on its content and on the adopted experimental conditions.

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Publication details

The article was received on 05 Oct 2017, accepted on 30 Nov 2017 and first published on 30 Nov 2017


Article type: Paper
DOI: 10.1039/C7PY01693J
Citation: Polym. Chem., 2017, Accepted Manuscript
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    Styrene and substituted styrene grafted functional polyolefins via nitroxide mediated polymerization

    I. domenichelli, S. Banerjee, S. Taddei, E. Martinelli, E. Passaglia and B. Ameduri, Polym. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7PY01693J

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