Aqueous hydrogen peroxide-induced degradation of polyolefins: A greener process for controlled-rheology polypropylene

Moad, Graeme; Dagley, Ian J.; Habsuda, Jana; Garvey, Christopher J.; Guoxin, Li; Nichols, Lance; Simon, George P.; Nobile, Maria Rossella

doi:10.1016/j.polymdegradstab.2015.04.001

In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for chain scissioning or vis-breaking of polypropylene during melt-processing to produce a controlled rheology product. The novel process involves the direct injection of aqueous hydrogen peroxide into the polypropylene melt under pressure. The polypropylene produced has reduced molar mass, narrowed molar mass distribution, and is indistinguishable in terms of melt flow rate, molar mass distribution, crystallinity and melt rheology from conventionally vis-broken polypropylene produced using an organic peroxide (2,5-dimethyl-2,5-di-tert-butylperoxyhexane (DHBP)). However, the polypropylene produced in the current process is notably free of the initiator-derived organic volatiles that are formed as by-products in the case where organic peroxides such as DHBP are used. (c) 2015 Elsevier Ltd. All rights reserved.

Titolo:	Aqueous hydrogen peroxide-induced degradation of polyolefins: A greener process for controlled-rheology polypropylene
Autori:	Moad, Graeme [Writing – Review & Editing] (Corresponding) Dagley, Ian J. [Membro del Collaboration Group] Habsuda, Jana [Membro del Collaboration Group] Garvey, Christopher J. [Membro del Collaboration Group] Li, Guoxin [Membro del Collaboration Group] Nichols, Lance [Membro del Collaboration Group] Simon, George P. [Membro del Collaboration Group] NOBILE, Maria Rossella [Data Curation] mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2015
Rivista:	POLYMER DEGRADATION AND STABILITY
Abstract:	In this work we demonstrate that aqueous hydrogen peroxide is an effective reagent for chain scissioning or vis-breaking of polypropylene during melt-processing to produce a controlled rheology product. The novel process involves the direct injection of aqueous hydrogen peroxide into the polypropylene melt under pressure. The polypropylene produced has reduced molar mass, narrowed molar mass distribution, and is indistinguishable in terms of melt flow rate, molar mass distribution, crystallinity and melt rheology from conventionally vis-broken polypropylene produced using an organic peroxide (2,5-dimethyl-2,5-di-tert-butylperoxyhexane (DHBP)). However, the polypropylene produced in the current process is notably free of the initiator-derived organic volatiles that are formed as by-products in the case where organic peroxides such as DHBP are used. (c) 2015 Elsevier Ltd. All rights reserved.
Handle:	http://hdl.handle.net/11386/4647558
Appare nelle tipologie:	1.1.2 Articolo su rivista con ISSN

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