Journal
POLYMER ENGINEERING AND SCIENCE
Volume 61, Issue 10, Pages 2567-2575Publisher
WILEY
DOI: 10.1002/pen.25783
Keywords
desulfurized rubber powder; free-radical polymerization; maleic anhydride; mechanism
Categories
Funding
- National Natural Science Foundation of China [51778136]
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The study aimed to enhance the recycling value of solid waste rubber by surface functionalization of desulfurized rubber powder using a one-pot method based on free-radical polymerization theory. Characterization techniques confirmed the successful grafting of maleic anhydride onto the desulfurized rubber powder, which led to improved thermal properties and surface coverage with a layer of fold-like maleic anhydride polymer.
The objective of the article was to enhance the recycling value of solid waste rubber by surface functionalization of desulfurized rubber powder using a one-pot method based on free-radical polymerization theory. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, scanning electron microscopy, and elemental analysis were used to characterize the maleic anhydride-grafted desulfurized rubber powder, and the grafting mechanism was also investigated. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed that maleic anhydride was grafted onto the desulfurized rubber powder. Thermogravimetric analysis indicated that the maleic anhydride-grafted desulfurized rubber powder and desulfurized rubber powder possessed different thermal properties and structure. The results of scanning electron microscopy and elemental analysis illustrated that the surface of the desulfurized rubber powder was covered with a layer of fold-like maleic anhydride polymer. The mechanism of grafting desulfurized rubber powder with maleic anhydride may be achieved by replacing the active alpha-H on the methylene group of the desulfurized rubber macromolecule chain.
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