文章摘要
Phase Morphology Evolution and Compatibilizing Mechanism of Compatibilized HIPS/HVPBR TPV
Received:August 24, 2014  Revised:August 24, 2014
DOI：
Key Words: HIPS; HVPBR; phase morphology evolution; compatibilization; dynamic vulcanization; microstructure
Author NameAffiliationE-mail
ZHAO Jing College of Materials Science & Engineering,Qingdao University of Science & Technology,Qingdao zhaoj15192032780@163.com 
He Ning Qingdao Institute of Products Quality Supervision and Inspection,Qingdao  
WANG Zhao-bo* College of Materials Science & Engineering,Qingdao University of Science & Technology,Qingdao wangzhb.cn@gmail.com 
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Abstract:
      Thermoplastic vulcanizates (TPV) based on high impact polystyrene (HIPS)/high vinyl polybutadiene rubber (HVPBR) blends were prepared by dynamic vulcanization, where styrene-butadiene-styrene block copolymer (SBS) was used as a compatilizer. The Phase morphology evolution was researched by field emission scanning electron microscope, and the influence of SBS on the microstructure of the prepared TPVs and the compatibilizing mechanism were also investigated. Experimental results indicated that the rubber phase was fragmented continuously during the dynamic vulcanization and was evolved into spherical particles with the diameters of 3-5 μm at 6 min (t90). Compared with that of HIPS/HVPBR TPV, the diameters of HVPBR particles in HIPS/SBS/HVPBR TPV were much smaller and the surfaces were much rougher. The microstructure images of HIPS/SBS/HVPBR TPV indicated that large amounts of clutter-like lamellar structure were formed in the surface of the rubber particles during the dynamic vulcanization. It would inevitably lead to the remarkably increased interface area and the enhanced interface interaction between the crosslinked HVPBR rubber and HIPS resin, resulting in the significant improvement of the mechanical properties.
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