Phase morphology and dynamic mechanical behavior for MIS toughened polyvinyl chloride

作者：Wang, Hai Ling; Tan, Hong Sheng; Li, Yu Jie; Yu, Yuan Zhang^*

来源：Journal of Applied Polymer Science, 2013, 129(6): 3466-3472.

DOI：10.1002/app.39095

• resins
• synthesis and processing
• rubber
• plasticizer
• morphology

Graft copolymers of isoprene (Is), styrene (St), and methyl methacrylate (MMA) monomers (MIS) with typical core-shell structure were synthesized by seed emulsion polymerization and used as a toughening agent for preparation of polyvinyl chloride (PVC)/MIS blends. The St and MMA monomers were separately grafted on the cross-linked poly-isoprene rubber core. The toughness, sub-micro-morphology, and dynamic mechanical behavior of the blends were characterized by impact machine, scanning electron microscopy (SEM), and dynamic mechanical analyzer. The results showed that the impact strength of the blends was optimized when the content of MIS in PVC/MIS blends was kept at a constant value of 8 wt %, while the content of Is in MIS was 70 wt %. SEM morphologies of impact fractured surface showed that the PVC/MIS blends were typical ductile fracture because of the toughness effect of rubber particles, which correlated well with the mechanical properties. Under the same rubber content condition, the curves of the dynamic mechanical behavior of MIS toughened PVC blends appeared a more obvious rubber peak, indicating that the rubber content of MIS was higher than that of methyl methacrylate-butadiene-styrene (MBS), which explained the better toughening effect of MIS compared with MBS.

• 出版日期2013-9-15
• 单位山东理工大学