Mechanical and Thermal Properties of Poly(phthalazinone biphenyl ether sulfone)/PEEK Blends

Abstract

A series of blends with various compositions are prepared by melt extrusion on the basis of novel copoly(phthalazinone biphenyl ether sulfone) (PPBES) and poly(ether ether ketone) (PEEK). The melt flowability, mechanical and thermal properties of the blends are studied. The results show that the incorporated PEEK has a large influence on the melt viscosity and thermal stability of blends. The tensile strength of the blends remains at about 90 MPa at room temperature; PPBES improves the mechanical properties of PEEK at 150°C. The flexural strength and modulus of the PPBES/PEEK blends also increase with the addition of PEEK.

Keywords:

• Blends
• Mechanical properties
• PEEK
• Phase structure
• Poly(phthalazinone biphenyl ether sulfone)

ACKNOWLEDGMENTS

This work has been financially supported by the National High Technology and Development Program of China (863 Program) No. 2003AA33G030. The authors gratefully acknowledge the help extended by Dr. Ren Mingfa for running MTS New810, Ms. Li Jianfeng for running the Differential Scanning Calorimetry and Dr. Lugang for running scanning electron microscopy.

Notes

^a 1% weight loss temperature.

^b 5% weight loss temperature.

^c Maximum-decomposing-rate.