Relationship between branch length and the compatibilizing effect of polypropylene-g-polystyrene graft copolymer on polypropylene/polystyrene blends
Article first published online: 11 NOV 2013
Copyright © 2014 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 7, April 5, 2014
How to Cite
2014). Relationship between branch length and the compatibilizing effect of polypropylene-g-polystyrene graft copolymer on polypropylene/polystyrene blends. J. Appl. Polym. Sci. 131, 40126, doi: 10.1002/app.40126, , and (
- Issue published online: 13 JAN 2014
- Article first published online: 11 NOV 2013
- Manuscript Accepted: 26 OCT 2013
- Manuscript Received: 23 JUL 2013
- National Natural Science Foundation of China. Grant Numbers: 51233005, 51073149
Three polypropylene-g-polystyrene (PP-g-PS) graft copolymers with the same branch density but different branch lengths were evaluated as compatibilizing agents for PP/PS blends. The morphological and rheological results revealed that the addition of PP-g-PS graft copolymers significantly reduced the PS particle size and enhanced the interfacial adhesion between PP and PS phases. Furthermore, it is verified that the branch length of PP-g-PS graft copolymer had opposite effects on its compatibilizing effect: on one hand, increasing the branch length could improve the compatibilizing effect of graft copolymer on PP/PS blends, demonstrated by the reduction of PS particle size and the enhancement of interfacial adhesion; on the other hand, increasing the branch length would increase the melt viscosity of PP-g-PS graft copolymer, which prevented it from migrating effectively to the interface of blend components. Additionally, the crystallization and melting behaviors of PP and PP/PS blends were compared. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40126.