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Determination of crosslink densities of carbon black filled natural rubber sulfur vulcanizates by 13 C NMR MAS spectroscopy and 1 H NMR transversal relaxation

1992; Wiley; Volume: 202; Issue: 1 Linguagem: Inglês

10.1002/apmc.1992.052020116

1522-9505

Uwe Hoffmann, Wolfram Gronski, Gerald Simon, André Wutzler,

Polymer crystallization and properties

Abstract Two NMR spectroscopic methods were applied to carbon black filled NR vulcanizates to determine the chemical crosslink density. Both methods give corresponding results. Addition of carbon black leads to a decrease of crosslink density with increasing filler content. The influence is more pronounced at higher sulfur content.