Morphology and physical properties of SAN/NBR blends: The effect of AN content and melt viscosity of SAN

✍ Scribed by Sang Jun Ahn; Kwan Hee Lee; Byung Kyu Kim; Han Mo Jeong

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 360 KB
• Volume: 73
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19990808)73:6<935::aid-app10>3.0.co;2-q

✦ Synopsis

To study the effect of dispersed poly(butadiene-co-acrylonitrile) (NBR) rubber size on the physical properties of poly(styrene-co-acrylonitrile) (SAN)/NBR blends, SANs with various melt viscosities and acrylonitrile (AN) contents were examined. The dispersed size of NBR, whose AN content is 30 wt %, was reduced as the melt viscosity of the SAN matrix was increased or as the AN content of the SAN matrix was reduced in the range of 19 -32 wt %. As the melt viscosity of the SAN matrix was increased, the damping peak of the NBR phase moved to a higher temperature, and as the AN content of SAN was reduced, the damping peak of the SAN phase moved to a lower temperature. Higher values of impact strength and elongation at break and reduced yield behavior at a low shear rate were observed at a finer dispersion of NBR.