Rheological behavior of blends of poly(methyl methacrylate) (PMMA) and poly(acrylonitrile-stat-styrene)-graft-polybutadiene (ABS)

✍ Scribed by Chang Dae Han; Heng-Huey Yang

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 425 KB
• Volume: 33
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1987.070330413

✦ Synopsis

The rheological behavior of blends of poly(methy1 methacrylate) (PMMA) and poly(acrylonitrile-stat-styrene)-gru~t-polybutadiene (ABS) was investigated using a cone-and-plate rheometer. The rheological properties measured were shear stress (u12), viscosity (q), and first normal stress difference (N,) as functions of shear rate (T) in steady shearing flow, and storage modulus (G') and loss modulus (G") as functions of frequency ( w ) in oscillatory shearing flow. It has been found that the rheological behavior of blends of ABS and PMMA was very similar to that of blends of poly(styrene-stat-acrylonitrile) (SAN) and PMMA, in that Nl in logarithmic plots of Nl versus uI2, and G' in logarithmic plots of G' versus G", vary regularly with blend composition. This has led us to conclude that the rubber particles that are grafted on an SAN resinous matrix in ABS resin plays only a minor role in influencing the compatibility of ABS/PMMA blends, and that the SAN chains attached to the surface of rubber particles, and the SAN matrix phase, play a major role in compatibilizing ABS resin with PMMA.