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5736186 
Journal Article 
Effect of rubber content of ABS on properties of PC/ABS blends. 1. Rheological, mechanical, and thermal properties 
Nigam, I; Nigam, D; Mathur, GN 
2005 
1 
Polymer - Plastics Technology and Engineering
ISSN: 0360-2559
EISSN: 1525-6111 
44 
5 
815-832 
WOS:000230198100004 
The effect of rubber content of poly(acrylonitrile butadiene styrene) (ABS) on compatibility and properties of polycarbonate (PC)/ABS blend systems has been investigated. The rheological, mechanical, physical, and thermal properties of PC/ABS blend systems containing ABS of different rubber content were studied. The reduced torque data on torque rheocord indicated improved processability of PC by addition of ABS, however, in ABS-rich compositions, higher rubber content reduces the extent of improvement. The tensile strength of PC decreased with addition of ABS to it but PC-rich compositions have a nearly additive response. The deviation form additivity for blends having higher rubber ABS was more pronounced. However, the impact strength of blends having higher rubber ABS were higher than other types and showed a positive deviation from additivity with variation in compositions. The blends containing ABS with lower rubber content showed a single glass-transition temperature (Tg) in differential scanning calorimetry studies (DSC) in the whole composition range indicating miscibility. Although two Tgs, one associated with PC phase and one with ABS phase, were observed for blends containing high rubber ABS, the shift in Tgs with respect to pure component values indicates partial miscibility. The decrease in the extent of shift with increase of ABS in these blends indicates undesirable phase separation due to poor adhesion of higher level of rubber content. 
polymer blends; PC/ABS blends; rheological; mechanical; thermal; torque rheocord