پديدآورندگان :
Hosseini Kakhk S. H Polymer Science Department, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran , Keyvan Rad J Polymer Science Department, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran , Abedini H Department of Process and Modeling, Iran Polymer and Petrochemical Institute, P.O. Box 14185/458, Tehran, Iran , Mahdavian Ali Reza Polymer Science Department, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran
كليدواژه :
PVC , core , shell , ASA , impact modifier , emulsion polymerization
چكيده فارسي :
Development of impact modifiers with the core-shell structure for enhancing toughness of rigid polymers such as poly (vinyl chloride) (PVC) has attracted a great deal of interest. In this study, crosslinked acrylonitrile-styrene-acrylate (ASA) impact modifier with different core (poly(butyl acrylate)) contents was prepared by two-stage seeded emulsion polymerization. The prepared ASA particles were then compounded with PVC using an internal mixer. The influence of ASA particles with crosslinked poly(acrylonitrile-co-styrene) as the shell layer, and those with different core contents on impact strength of their blends with PVC were investigated. Crosslinking of the shell layer in ASA particles facilitated their well-distribution in PVC matrix and observed by SEM images. This improved their impact resistance and heat distortion temperature (HDT) compared to those without any crosslinking. In addition, the Izod results showed that ASA particles with higher core content had higher impact strength.
