The effective network chain density ( e ) and the density of the chains between sulfurizations (2[S] chem ) for natural rubber vulcanized with N-t-butyl benzothiazole sulfenamide (TBBS) in different levels of HAF-HS (N347) carbon black were determined by equilibrium swelling and solid-state 13 C-NMR
Structural characterization of sulfur vulcanized deproteinized natural rubber by solid-state 13C NMR spectroscopy
β Scribed by Jitladda T. Sakdapipanich; Tippawan Kowitteerawut; Surakit Tuampoemsab; Seiichi Kawahara
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 100 KB
- Volume
- 100
- Category
- Article
- ISSN
- 0021-8995
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The chemical changes that occur in thermal degradation of sulfur-cured natural rubber were investigated using 13 C-NMR analysis. The crosslinked carbons formed during the vulcanization process appear in the NMR spectra as peaks representing the various structures formed. Samples of vulcanized rubber
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## Abstract Crystallization of ferrocene and ruthenocene substituted in the 1β and 1β²βpositions by two nitronyl nitroxide radicals gave the new crystal phases Ξ²β**1** (besides the known phase Ξ±β**1**), Ξ±β**2**, and Ξ²β**2** whose structures were determined by Xβray analysis. In Ξ²β**1** the radical m