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In Situ Modification of Unmodified Montmorillonite in Polypropylene by Electron‐Induced Reactive Processing
Author(s) -
Thakur Varun,
Gohs Uwe,
Wagenknecht Udo,
Heinrich Gert
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100694
Subject(s) - montmorillonite , chemical modification , polypropylene , in situ , surface modification , polymer chemistry , chemical engineering , silane , chemistry , materials science , organic chemistry , engineering
The potential of electron‐induced reactive processing for the in situ modification of unmodified montmorillonite (MMT) is described. During melt mixing process, energy and negative electron charges are absorbed in the polypropylene‐unmodified MMT composite in the presence of a chemical coupling agent. The total amount of absorbed electron charges, the absorbed dose, and the pH‐dependent charges developed on the MMT edges play a significant role in the in situ modification of MMT. The proposed chemical mechanism behind the in situ modification of MMT in the presence of vinyl silane as coupling additive is described in detail. Finally, a speculative sketch is described to explain the influence of pH‐dependent charges on the modification of MMT.