NDLI: Effect of sulfonation with concentrated sulfuric acid on the composition and carbonizability of LLDPE fibers

Content Provider	Springer Nature Link
Author	Xie, Ben Hong, Liang Chen, Peng Zhu, Bo
Copyright Year	2015
Abstract	The linear low-density polyethylene (LLDPE) fibers were sulfonated in 95 % concentrated sulfuric acid. The structure composition and thermal stability of the polyethylene (PE) fibers sulfonated for various times were determined by Fourier transform infrared spectroscopy (FTIR), resonance Raman spectra, elemental analysis, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA). It was confirmed that substitution, oxidation and desulfonation took place in succession during sulfonation. The initial increase of sulfonic acid and hydroxyl groups, as an indication of the substitution reaction, led to a proposal that the reaction was initiated by the abstraction of hydrogen by H2SO4 to give PE radical, which reacted with H2SO4 to give HSO3· and HO· radical, and terminated by the formation of PE–SO3H and PE–OH. The subsequent decrease of hydroxyl groups and generation of carbonyl groups were attributed to the oxidation reaction. The formation of C=C double bonds and the decrease of sulfur and sulfonic acid groups later on implied that the desulfonation reaction proceeded to induce intermolecular cross-linking. The cross-linked and conjugated polyenes derived from the desulfonation probably attributed to the high char yield for sulfonated LLDPE fibers.
Starting Page	891
Ending Page	908
Page Count	18
File Format	PDF
ISSN	01700839
Journal	Polymer Bulletin
Volume Number	73
Issue Number	3
e-ISSN	14362449
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-09-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polyethylene fibers Sulfonation Desulfonation Conjugation Cross-linking Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Condensed Matter Physics Polymers and Plastics

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