Next Article in Journal
Thermoresponsive Polymer Gating System on Mesoporous Shells of Silica Particles Serving as Smart Nanocontainers
Next Article in Special Issue
Development of Polypropylene-Based Single-Polymer Composites With Blends of Amorphous Poly-Alpha-Olefin and Random Polypropylene Copolymer
Previous Article in Journal
The Reservoir Adaptability and Oil Displacement Mechanism of Polymer Microspheres
Previous Article in Special Issue
Antiplasticization of Polymer Materials: Structural Aspects and Effects on Mechanical and Diffusion-Controlled Properties
Article

Influence of Different Types of Peroxides on the Long-Chain Branching of PP via Reactive Extrusion

1
Institute of Material Science and Technology, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
2
Institute of Chemical Technology of Organic Materials, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
3
Pergan GmbH, Schlavenhorst 71, 46395 Bocholt, Germany
4
Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(4), 886; https://doi.org/10.3390/polym12040886
Received: 24 March 2020 / Revised: 6 April 2020 / Accepted: 8 April 2020 / Published: 11 April 2020
(This article belongs to the Special Issue Processing-Structure-Properties Relationships in Polymers II)
Long-chain branching (LCB) is known as a suitable method to increase the melt strength behavior of linear polypropylene (PP), which is a fundamental weakness of this material. This enables the modification of various properties of PP, which can then be used—in the case of PP recyclates—as a practical “upcycling” method. In this study, the effect of five different peroxides and their effectiveness in building LCB as well as the obtained mechanical properties were studied. A single screw extruder at different temperatures (180 and 240 °C) was used, and long-chain branched polypropylene (PP-LCB) was prepared via reactive extrusion by directly mixing the peroxides. The peroxides used were dimyristyl peroxydicarbonate (PODIC C126), tert-butylperoxy isopropylcarbonate (BIC), tert-Butylperoxy 2-ethylhexyl carbonate (BEC), tert-amylperoxy 2-ethylhexylcarbonate (AEC), and dilauroyl peroxide (LP), all with a concentration of 20 mmol/kg. The influence of the temperature on the competitive prevalent reactions of degradation and branching was documented via melt mass-flow rate (MFR), rheology measurements, and gel permeation chromatography (GPC). However, via extensional rheology, strain hardening could be observed in all cases and the mechanical properties could be maintained or even improved. Particularly, PODIC C126 and LP signaled a promising possibility for LCB in this study. View Full-Text
Keywords: polypropylene; reactive extrusion; peroxide; long-chain branching; strain hardening polypropylene; reactive extrusion; peroxide; long-chain branching; strain hardening
Show Figures

Graphical abstract

MDPI and ACS Style

Stanic, S.; Gottlieb, G.; Koch, T.; Göpperl, L.; Schmid, K.; Knaus, S.; Archodoulaki, V.-M. Influence of Different Types of Peroxides on the Long-Chain Branching of PP via Reactive Extrusion. Polymers 2020, 12, 886. https://doi.org/10.3390/polym12040886

AMA Style

Stanic S, Gottlieb G, Koch T, Göpperl L, Schmid K, Knaus S, Archodoulaki V-M. Influence of Different Types of Peroxides on the Long-Chain Branching of PP via Reactive Extrusion. Polymers. 2020; 12(4):886. https://doi.org/10.3390/polym12040886

Chicago/Turabian Style

Stanic, Sascha, Gergö Gottlieb, Thomas Koch, Lukas Göpperl, Klaus Schmid, Simone Knaus, and Vasiliki-Maria Archodoulaki. 2020. "Influence of Different Types of Peroxides on the Long-Chain Branching of PP via Reactive Extrusion" Polymers 12, no. 4: 886. https://doi.org/10.3390/polym12040886

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop