Affiliation:
1. School of Chemistry and Materials Engineering Beijing Technology and Business University Beijing People's Republic of China
2. Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics Beijing People's Republic of China
Abstract
AbstractMicrocellular foams of polyphenylene oxide/high‐impact polystyrene (PPO/HIPS) with high strength are prepared using supercritical CO2 foaming technology. The study focuses on examining the influence of polytetrafluoroethylene (PTFE) and polystyrene–butadiene block (SEBS) polymers in PPO/HIPS blends. Compared with the pure PPO/HIPS blend, the PPO/HIPS blend with 1 phr PTFE exhibits higher impact strength (7.62 kJ/m2), and the foam compressive strength is 5% larger. The PPO/HIPS foams with 1 phr PTFE (as a nucleating agent) and 5 phr SEBS (as a toughening agent) display a small cell diameter (13.73 μm) and the highest cell density (2.02 × 109 cells/cm3) compared to the pure PPO/HIPS blend. Moreover, the compressive strength of the PPO/HIPS/PTFE‐1/SEBS‐5 foam (1.63 MPa at a 5% strain) demonstrates a remarkable increase of 92% compared to that of the PPO/HIPS/PTFE‐1 foam.
Funder
National Key Research and Development Program of China