Abstract: The interpenetrating polymer network(IPN)of polydimethylsiloxane and polyurethane is introduced.The ablation properties and mechanical characteristics of the IPN are improved when adding ablative fillers.The burning rate of the IPN in oxyacetylene is 0 0726 mm/s

Key words: Propellant cladding;Cladding material;Siloxane;Ablation property;Mechanical performance

摘要： 用同步法合成聚二甲基硅氧烷／聚氨酯互穿聚合物网络（ＰＤＭＳ／ＰＵＩＰＮ），并在其中加入耐烧蚀性填料，该材料的力学性能及耐烧蚀性能都有较大提高，其氧乙炔线烧蚀率达到了０．０７２６ｍｍ／ｓ。

关键词: 推进剂包覆;包覆材料;硅氧烷;烧蚀性能;力学性能