000			01485nam a2200193Ia 4500
008			220216s9999 xx 000 0 und d
100			_aVersloot P
245		0	_aSulfur vulcanization of simple model olefins, Part IV : Vulcanizations of 2,3-dimethyl-2-butene with TMTD and activated zinc dithiocarbamate/xanthate accelerators at different temperatures
260			_bRubber Chemistry and Technology _c1995
300			_a563-572
520			_aThe mechanism of the accelerated sulfur vulcanization of rubber was studied by the use of 2,3-dimethyl-2-butene (C6H12, TME) as a simple, low-molecular model alkene. Treatment of TME with a mixture of ZnO, S8 and the classical accelerator TMTD at temperatures above 100 C yields a mixture of addition products (C6H11-Sn-C6H11). In the temperature range of 50 up to 100 C only interrmediate products, C6H11-Sn-S(s)CN(CH3)2 are obtained. Room temperature vulcanization is feasible using highly reactive accelerators, such as xanthate derivatives. These derivatives result in formation of the crosslink precursors which are converted to the actual crosslink in the presence of zinc dithiocarbamates. The addition of (secondary) amines enhances the solubility of the dithiocarbamates, and therefore the reactivity of the xanthate/zinc dithiocarbamate combination.
650			_aNatural rubber
650			_aSulfur vulcanization
700			_aHaasnoot J G
700			_aPut J
700			_aReedijk J
700			_aVan Duin M
942			_cJS
999			_c69931 _d69931