Details

Autor(en) / Beteiligte

• Bäuerle, Tim
• Ulitzsch, Steffen
• Lorenz, Anita
• Rebner, Karsten
• Chassé, Thomas
• Kandelbauer, Andreas
• Lorenz, Günter

Titel

Effects of process parameters on silane grafting of liquid ethylene-propylene copolymer by reactive extrusion as quantified by response surface methodology

Ist Teil von

• Polymer (Guilford), 2020-08, Vol.202, p.122601, Article 122601

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Here, we report the continuous peroxide-initiated grafting of vinyltrimethoxysilane (VTMS) onto a standard polyolefin by means of reactive extrusion to produce a functionalized liquid ethylene propylene copolymer (EPM). The effects of the process parameters governing the grafting reaction and their synergistic interactions are identified, quantified and used in a mathematical model of the extrusion process. As process variables the VTMS and peroxide concentrations and the extruder temperature setting were systematically studied for their influence on the grafting and the relative grafting degree using a face-centered central composite design (FCD). The grafting degree was quantified by 1H NMR spectroscopy. Response surface methodology (RSM) was used to calculate the most efficient grafting process in terms of chemical usage and graft yield. With the defined processing window, it was possible to make precise predictions about the grafting degree with at the same time highest possible relative degree of grafting. [Display omitted] •Liquid ethylene propylene copolymer produced by radical initiated VTMS modification via controlled reactive extrusion.•Causal understanding of reactive extrusion based on identifying and quantifiying factor effects and synergistic actions.•Robust quantitative modelling of extrusion process allowing reliable prediction of grafting degree at high graft yields.•Continuous VTMS grafting process on a semi-industrial scale with tailored functionalization degree.