TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Ulitzsch, Steffen
A1  - Bäuerle, Tim
A1  - Stefanakis, Mona
A1  - Brecht, Marc
A1  - Chassé, Thomas
A1  - Lorenz, Günter
A1  - Kandelbauer, Andreas
T1  - Synthesis of an addition-crosslinkable, silicon-modified polyolefin via reactive extrusion monitored by in-line raman spectroscopy
JF  - Polymers
N2  - We present the modification of ethylene-propylene rubber (EPM) with vinyltetra-methydisiloxane (VTMDS) via reactive extrusion to create a new silicone-based material with the potential for high-performance applications in the automotive, industrial and biomedical sectors. The radical-initiated modification is achieved with a peroxide catalyst starting the grafting reaction. The preparation process of the VTMDS-grafted EPM was systematically investigated using process analytical technology (in-line Raman spectroscopy) and the statistical design of experiments (DoE). By applying an orthogonal factorial array based on a face-centered central composite experimental design, the identification, quantification and mathematical modeling of the effects of the process factors on the grafting result were undertaken. Based on response surface models, process windows were defined that yield high grafting degrees and good grafting efficiency in terms of grafting agent utilization. To control the grafting process in terms of grafting degree and grafting efficiency, the chemical changes taking place during the modification procedure in the extruder were observed in real-time using a spectroscopic in-line Raman probe which was directly inserted into the extruder. Successful grafting of the EPM was validated in the final product by 1H-NMR and FTIR spectroscopy.
KW  - reactive extrusion
KW  - silane modification
KW  - hydride modification
KW  - vinyltetramethyldi-siloxane (VTMDS)
KW  - response surface analysis
KW  - ethylene-propylene copolymer (EPM)
KW  - grafting
KW  - process analytical technology (PAT)
KW  - in-line spectroscopy
KW  - in situ analysis
Y1  - 2021
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:rt2-opus4-30887
SN  - 2073-4360
SS  - 2073-4360
U6  - https://doi.org/10.3390/polym13081246
DO  - https://doi.org/10.3390/polym13081246
VL  - 13
IS  - 8
SP  - 1
EP  - 22
S1  - 22
PB  - MDPI
CY  - Basel
ER  -