Toughening of Polystyrene with Ethylene-Propylene-Diene Terpolymer (EPDM) Compatibilized by Styrene-Butadiene-Styrene Block Copolymer (SBS)

✍ Scribed by Zhengping Fang; Zhenghong Guo; Linlin Zha

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 235 KB
• Volume: 289
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200300356

✦ Synopsis

Abstract

Summary: Polystyrene (PS) was toughened with ethylene‐propylene‐diene terpolymer (EPDM) in the presence of styrene‐butadiene‐styrene block copolymer (SBS). Incorporation of SBS into the PS/EPDM blends clearly improved the impact properties. For PS/EPDM/SBS (mass ratio: 69/21/10) blends, the notched Charpy impact strength reached a maximum value of 26.3 kJ/m^2^. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that SBS was distributed on the interface between PS and EPDM. Butanone extraction and FTIR analysis found that there was a grafting reaction between PS and EPDM phase during melt compounding. Shearing and processing rheological behaviors of blends were evaluated with a Haake capillary rheometer and a torque rheometer, respectively.
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