文献类型：期刊文献

英文题名：Preparation and Properties of High-Temperature-Resistant and Low-Dielectric Constant Silicon-Containing Arylacetylene Resin/SiO2 Syntactic Foams

作者：Shen, Xuetao[1];Jin, Chaoen[1];Wang, Fan[1];Zhu, Yaping[1];Deng, Shifeng[1];Qi, Huimin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai 200237, Peoples R China

年份：2024

卷号：26

期号：22

外文期刊名：ADVANCED ENGINEERING MATERIALS

收录：;EI(收录号：20244417283065);WOS:【SCI-EXPANDED(收录号:WOS:001340947000001)】；

基金：This work was financially supported by the Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, East China University of Science & Technology, and the Fundamental Research Funds for the Central Universities (nos. 50321041918013 and 50321041917001).

语种：英文

外文关键词：high-temperature resistance; low dielectric constants; silicon-containing arylacetylene resin syntactic foams; wave-transmission materials

摘要：A silicon-containing arylacetylene resin (PSA)/SiO2 syntactic foam was prepared through a chemical foaming approach, with PSA serving as the matrix, quartz sand (QS) and nanosilica (nSiO2) acting as fillers, and their structures and properties were characterized. The results show that the incorporation of appropriate amounts of QS and nSiO2 can reduce the cell size and apparent density of the syntactic foam, and improve its heat resistance, dielectric properties and wave transmission properties. The addition of QS can increase the compressive strength of the syntactic foam, while the addition of nSiO2 decreases the compressive strength. The apparent densities of the PSA/9QS and PSA/9nSiO2 syntactic foams with 9% filler addition are 0.242 g cm-3 and 0.157 g cm-3, respectively, and the temperatures at 5% weight loss (Td5) under a nitrogen atmosphere were 692 degrees C and 658 degrees C, respectively. The dielectric constants were 1.59 and 1.25, respectively. The wave transmittance within the frequency range of 8.2-12.4 GHz was 98.5% and 96.8%, respectively. PSA/SiO2 syntactic foam can be used as a lightweight and high-temperature-resistant wave-transmission material in aerospace and other fields.