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热塑性塑料的分子结构为线型结构,因此在建筑工程中不能作为结构材料使用。与此相反,热固性塑料的分子结构则为网状交联结构,因而各种机械力学性、耐湿性、绝缘性、耐老化性等均优于热塑性塑料。如用纤维和热固性树脂复合成产品,其拉伸强度可和钢材比拟,弹性模量也达到了铝合金的数量级,因而在国外作为结构材料发展很快,在建筑工程中应用广泛,玻璃钢就是最典型的一种。
The molecular structure of thermoplastics is a linear structure and therefore cannot be used as a structural material in construction projects. In contrast, the molecular structure of thermosetting plastics is a cross-linked network structure, so all kinds of mechanical properties, moisture resistance, insulation, and aging resistance are superior to thermoplastics. Such as fiber and thermosetting resin compounded into a product, its tensile strength can be compared with the steel, the elastic modulus also reached the order of magnitude of the aluminum alloy, and therefore developed rapidly as a structural material in foreign countries, widely used in construction projects, fiberglass is the most Typical one.