Effects of composition and dynamic vulcanization on the rheological properties of PP/NBR blends

被引：15
|
作者：
Hernández, M
González, J
Albano, C
Ichazo, M
Lovera, D
机构：
[1] Univ Simon Bolivar, Dept Mecan, Caracas 1080, Venezuela
[2] Cent Univ Venezuela, Fac Ingn, Lab Polimeros, Ctr Quimica,IVIC, Caracas, Venezuela
来源：
POLYMER BULLETIN | 2003年 / 50卷 / 03期
关键词：
D O I：
10.1007/s00289-003-0158-8
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Rheological behavior of isotactic polypropylene (PP) and nitrile rubber (NBR) blends, in the composition range of 10-30-wt % NBR content were studied, with special reference to the effect of blend ratio, dynamic vulcanization and compatibilization. All blends were prepared in a twin-screw extruder. Capillary Rheometry was employed. Pseudoplastic behavior of blends was favored by increasing rubber content. The incorporation of NBR into PP lowered activation energies. Compatibilization of unvulcanized blends did not produce significant changes on flow behavior. Dynamically vulcanized blends provide unique processing characteristics that enable to perform well in both injection molding and extrusion.
引用
收藏
页码：205 / 212
页数：8
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