Nitrosamine formation in rubber: I. Influence of mixing history

被引:6
作者
Willoughby, BG [1 ]
Scott, KW [1 ]
机构
[1] Rapra Technol Ltd, Shrewsbury SY4 4NR, Salop, England
来源
RUBBER CHEMISTRY AND TECHNOLOGY | 1998年 / 71卷 / 02期
关键词
D O I
10.5254/1.3538487
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Despite much published research. the influence of fillers on nitrosamine formation in accelerated sulphur vulcanization is not well understood. This paper studies N-nitrosodimethylamine (NDMA) formation in a range of TMTD-accelerated, black-filled rubber formulations encompassing EPDM, SBR, NR, and NBR rubbers. Two levels of TMTD and carbon black were variables in this study as was the type of carbon black used (N330 and N550). The use of statistical experimental design has shown how reliable data on nitrosamine formation in vulcanizates can be obtained by paying strict attention to process history, and has revealed, for the SBR, NR, and NBR rubbers studied, a correlation between the temperatures reached on mixing with the level of nitrosamine generated on subsequent vulcanization. Far these rubbers the effect of this process history outweighs that of any ingredient variable. While allowing new insights to be gained on nitrosamine formation in rubber. these findings allow the development of a self-consistent mechanism for nitrosation processes where the reactions in diene rubbers mirror those in air.
引用
收藏
页码:310 / 322
页数:13
相关论文
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