Fibre‐reinforced polybutadiene/ styrene‐butadiene‐styrene triblock copolymer/ ethylene‐propylene‐diene terpolymer/titanium dioxide (PB/SBS/EPDM/TiO₂) composite laminates with superior dielectric properties were fabricated by impregnation and hot pressing. The effects of concentration and particle size of rutile spherical TiO₂ on the microwave dielectric properties of the PB/SBS/EPDM/TiO₂ composite laminates were investigated at microwave frequency region. Additionally, the mechanical, thermal, and water absorption properties of the laminates were also evaluated. Results indicated that the dielectric properties were obviously improved with the increase of concentration or the decrease of particle size. The laminate filled with 230 nm TiO₂ at a filler loading of 70 wt% possessed high dielectric constant (7.03, 10 GHz), low dielectric loss (0.0042, 10 GHz), outstanding mechanical, thermal properties, and low water absorption. Enhanced dielectric properties and other prominent properties enable the fibre‐reinforced polyolefin‐based composite laminates to be a potential candidate for microwave substrate applications.

中文翻译：

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TiO2的浓度和粒径对聚烯烃基微波基片介电性能的影响

纤维增强的聚丁二烯/苯乙烯-丁二烯-苯乙烯三嵌段共聚物/乙烯-丙烯-二烯三元共聚物/二氧化钛（PB / SBS / EPDM / TiO ₂）复合层压板通过浸渍和热压制成。研究了金红石球形TiO ₂的浓度和粒径对PB / SBS / EPDM / TiO ₂复合层压板微波介电性能的影响。另外，还评估了层压材料的机械，热和吸水性能。结果表明，随着浓度的增加或粒径的减小，介电性能明显提高。填充230 nm TiO ₂的层压板填料含量为70 wt％时，其介电常数高（7.03，10 GHz），介电损耗低（0.0042，10 GHz），具有出色的机械，热性能和低吸水率。增强的介电性能和其他突出性能使纤维增强聚烯烃基复合层压板成为微波基板应用的潜在候选者。