ISSN:
0003-3146
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Sulfur crosslinking systems are well established for curing of rubbers containing olefinic bonds and are well optimized for various processing and end product requirements. This is achieved by the clever selection of accelerator or their combinations or varying sulfur to accelerator ratio. This ratio defines primarily the structure and density of the sulfur crosslinks. Semi efficient crosslinking systems allow in NR as in SBR best compromise of properties with respect to processing, static and dynamic behaviour and ageing. In NR the structure of the crosslinks contrary to SBR has a larger influence on dynamic crack propagation. Polysulfidic crosslinks are preferred for higher tensile strength, tear and fatigue resistance.Great challenges for accelerated sulfur crosslinking exist to meet new ecological and toxicological requirements such as avoidance of nitrosamines in rubber industry. The present work shows that there is a potential for new developments in the classical sulfur vulcanization to satisfy the present needs and meet the future challenges.
Additional Material:
13 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/apmc.1992.052020104
