Impact Strength and Crystallization Behavior of Nano-SiOx/Poly(phenylene sulfide) (PPS) Composites with Heat-Treated PPS
✍ Scribed by Dan Lu; Yiu-Wing Mai; Robert K. Y. Li; Lin Ye
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 135 KB
- Volume
- 288
- Category
- Article
- ISSN
- 1438-7492
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✦ Synopsis
Abstract
The effects of heat treatment on the crystal structure and impact strength of poly(phenylene sulfide) (PPS) and nano‐SiO~x~/ PPS nanocomposites were studied. The molecular weight of heat‐treated neat PPS was increased by 28% due to the crosslinking reaction that changed its crystal morphology. Also, the crystallinity was reduced by 18%, leading to an improvement of the Izod impact strength by 66%. Nano‐SiO~x~/PPS composites were manufactured by intensive compounding with 3 wt.‐% nano‐SiO~x~ particles treated by an epoxy functional group. Test results showed that the Izod impact strength of nano‐SiO~x~/heat‐treated PPS composites was 91% better and the crystallinity 27% less compared to the same properties of “as received” neat PPS. Nano‐SiO~x~ has a high specific surface area and a high surface energy; its grafted epoxy group promotes interfacial adhesion with the PPS matrix, hence increasing the Izod impact strength of the nanocomposites.
TEM micrograph of NHTM‐PPS with 3 wt.‐% nano‐SiO~x~.
magnified imageTEM micrograph of NHTM‐PPS with 3 wt.‐% nano‐SiO~x~.