Synergistic effects of in situ fibrillated polytetrafluoroethylene and polystyrene–butadiene block on the microcellular foaming behaviors of polyphenylene oxide modified by high-impact polystyrene

IF 2.8 3区化学 Q2 POLYMER SCIENCE

Journal of Applied Polymer Science Pub Date : 2024-04-24 DOI:10.1002/app.55551

Meiqi Yan, Zhuolun Li, Haiming Liu, Yibo Sun, Xiangdong Wang, Shihong Chen

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Abstract

Microcellular 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.

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原位纤维化聚四氟乙烯和聚苯乙烯-丁二烯嵌段对高抗冲聚苯乙烯改性聚苯醚微孔发泡行为的协同效应

利用超临界二氧化碳发泡技术制备了具有高强度的聚苯醚/高抗冲聚苯乙烯（PPO/HIPS）微孔泡沫。该研究重点考察了 PPO/HIPS 混合物中聚四氟乙烯（PTFE）和聚苯乙烯-丁二烯嵌段（SEBS）聚合物的影响。与纯 PPO/HIPS 混合物相比，含有 1 phr PTFE 的 PPO/HIPS 混合物显示出更高的冲击强度（7.62 kJ/m2），泡沫抗压强度提高了 5%。与纯 PPO/HIPS 混合物相比，含有 1 phr PTFE（作为成核剂）和 5 phr SEBS（作为增韧剂）的 PPO/HIPS 泡沫显示出较小的细胞直径（13.73 μm）和最高的细胞密度（2.02 × 109 cells/cm3）。此外，PPO/HIPS/PTFE-1/SEBS-5 泡沫的抗压强度（5% 应变时为 1.63 兆帕）比 PPO/HIPS/PTFE-1 泡沫显著提高了 92%。

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来源期刊

Journal of Applied Polymer Science 化学-高分子科学

CiteScore

5.70

自引率

10.00%

发文量

1280

审稿时长

2.7 months

期刊介绍： The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.