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Mechanism of crosslinking in benzoyl peroxide‐initiated functionalization of vinyltriethoxysilane onto polypropylene in the water medium
Author(s) -
Yuan Hao,
Shao Qing,
Liang Fengchun,
Shi Hongwei,
Song Wenbo
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49534
Subject(s) - vinyltriethoxysilane , polyolefin , benzoyl peroxide , surface modification , grafting , polypropylene , polymer chemistry , materials science , silane , chemical engineering , peroxide , chemistry , polymerization , organic chemistry , composite material , polymer , layer (electronics) , engineering
Abstract Silane grafting and moisture crosslinking is one of the most common methods in the production of crosslinked polyolefin. A remarkable increase in the percentage of gel in the product was observed in benzoyl peroxide‐mediated aqueous suspension grafting of vinyltriethoxysilane onto polypropylene. Aimed to explore the crosslinking reaction mechanism in this functionalization process, comprehensive experiments had been conducted and the grafted products were characterized by mass spectrometry, 1 H NMR, and 29 Si NMR spectroscopy. Finally, a novel crosslinking mechanism was proposed based on the characterization results.