synthetic，syntactic，composite区别？ 最近看资料syntactic foams, composite synatactic foams，没弄明白到底有什么不同？请专家指示， 谢谢。 以下为文章的部分原文： The main materials used in the insulation industry consist of polymer materials such as polypropylene,polyurethane and epoxy. These insulation materials come in four main forms as solid, blown foam, syntactic and composite syntactic. Syntactic and composite syntactic foams have been specifically developed for deepwater applications.These materials offer the advantage of high strength and low density. Syntactic foams generally consist of small hollow spherical structures called microspheres incorporated into a solid polymer matrix. It is the microspheres which provide high hydrostatic strength to the polymer. Microspheres are typically between 50 and 200 microns in diameter and are commonly made from glass. Typical densities for syntactic foams are 600-800 kg/m3. Syntactic foam systems are designed to operate in water depths of up to 6000m. Compolite syntactic foams are similar to syntactic foams but also contain larger hollow spherical structures called macrospheres which are over lmm in diameter and can he as large as 75mm in diameter. The use of macrospheres helps to reduce the density of the material further from that of a syntactic foam and still provide reasonable hydrostatic strength. In general microspheres provide higher strength than macrospheres. Macrospheres are generally made from reinforced thermoplastics. Typical densities for composite syntactic foams are 400-600kg/m3. Composite syntactic foam systems have operational depths of up to 3000m. The most common polymer materials used for thermal insulation are polyurethane (thermoplastic and elastomeric), epoxies(amine or anhyride cured) and polypropylene.查看更多3个回答 . 3人已关注
第1天
关注盖德视界
添加小助手
